A practical guide to the technical concepts behind aluminum windows, doors,
shopfronts, sliding systems, folding systems, glass, fabrication, installation,
and system pricing.
Page sections
Use this index to jump directly to a topic. Each section includes a short
explanation, technical notes, and a simple visual reference.
Section 01
Core terms
Aluminum systems use a specific vocabulary to describe the profiles, parts,
and assemblies that make up windows, doors, sliders, shopfronts, and folding
systems. Understanding these terms makes it easier to read manuals, compare
systems, create quotes, and communicate with fabricators and installers.
Aluminum system
A complete product family made from extrusions, accessories, gaskets,
hardware, glass rules, fabrication methods, and installation details.
Extrusion
A long aluminum profile manufactured by pushing heated aluminum through
a shaped die. The same cross-section continues along the full length.
Frame
The fixed outer part of a window, door, shopfront, or slider that connects
the system to the building opening.
Sash
The opening or moving part of a window system. The sash usually carries
the glass and operates inside the fixed frame.
Mullion
A vertical dividing profile between glass panels, sashes, doors, or fixed
lights. Mullions often carry wind load and can be structurally important.
Transom
A horizontal dividing profile used to separate upper and lower glass areas
or create top lights within a frame.
Glazing bead
A removable or clip-in profile that holds the glass in position inside
the frame or sash.
Gasket
A rubber or flexible seal used around glass or moving parts to improve
weather sealing, cushioning, and fit.
Interlock
The meeting profile between sliding panels. It helps close the gap between
panels and contributes to sealing, alignment, and security.
Threshold / sill
The bottom part of a frame or door system. It is often critical for water
drainage, walking access, roller support, and weather resistance.
Wind loading is the pressure that wind applies to a window, door, shopfront,
slider, folding system, or glazed opening. A system must be strong enough to
resist that pressure without excessive bending, glass failure, water leakage,
air leakage, hardware problems, or fixing failure.
Wind load is not the same on every project. It depends on the building location,
height, exposure, opening size, building shape, and the position of the opening
on the building. Openings near corners, edges, exposed elevations, coastal zones,
or higher floors can experience higher pressure than more sheltered openings.
Design pressure
Design pressure is the wind pressure that the product or system is expected
to resist. It is often used when selecting glass thickness, mullion strength,
fixing requirements, and system suitability.
Positive pressure
Positive pressure occurs when wind pushes directly onto the outside face of
the window or door. The system is pushed inward toward the building interior.
Negative pressure / suction
Negative pressure occurs when wind creates suction on the building face.
The system can be pulled outward away from the building. Both positive and
negative pressure must be considered.
Deflection
Deflection is the amount a profile bends under wind pressure. A profile may
not break, but if it bends too much it can affect glass support, seals,
drainage, locks, rollers, and the visible quality of the installation.
Mullion loading
Mullions often carry wind load from glass panels on both sides. Taller or
wider openings may require stronger mullions, deeper profiles, reinforcing,
reduced panel sizes, or project-specific engineering checks.
Glass loading
Glass must be selected according to panel size, support condition, glass type,
thickness, and wind pressure. Larger glass panels usually require more careful
checking than smaller panels.
Fixing load
Wind load must transfer from the glass into the aluminum profiles, from the
profiles into the frame, and from the frame into the building. The fixings,
packers, anchors, and building substrate must all be suitable for the load.
A correct wind-loading check should consider the complete path of the load:
glass to bead, bead to sash or frame, sash to hardware or frame, frame to fixing,
and fixing to building structure. The system is only as strong as the weakest part
of that load path.
Glass selection is affected by the size of the pane, the wind pressure on the
opening, the glass type, the support condition, and where the glass is used.
Larger panes carry more load and usually need more careful checking than smaller
panes.
Glass should not be selected only by habit, price, or appearance. The same glass
thickness may be suitable in a small bathroom window but unsuitable in a large
patio slider, shopfront, or exposed upper-floor opening.
Glass area
Glass area is calculated as width multiplied by height. For example, a pane
that is 1.2 m wide and 1.5 m high has an area of 1.8 m². Larger areas usually
increase the demand on glass thickness and support.
Glass width and height
The width and height of a pane matter separately, not only as a total area.
A tall narrow pane and a wide short pane can behave differently, even when
their square meter area is similar.
Aspect ratio
Aspect ratio is the relationship between the width and the height of the
glass. Very narrow, very wide, or unusually shaped panes may need additional
checking because load distribution changes with shape.
Glass thickness
Thickness affects glass strength and stiffness. Thicker glass generally
resists bending better, but thickness alone is not the full answer. Glass
type, size, support, and location must also be considered.
Edge support
Glass may be supported on four edges, two edges, by structural silicone, by
clamps, or by point fixings. A pane supported on all four edges normally
behaves differently from a pane with limited edge support.
Glass bite
Glass bite is the amount of glass edge held inside the frame or glazing bead.
Too little bite can reduce support, while too much bite can create fit,
drainage, or tolerance problems.
Edge clearance
Glass should have suitable clearance inside the glazing pocket. Clearance
allows for fabrication tolerance, glass movement, frame movement, setting
blocks, drainage, and gasket compression.
Setting blocks
Setting blocks support the glass and keep the glass edge away from direct
hard contact with aluminum. They help position the pane correctly and protect
the glass edge from damage.
Safety location
Some glass positions require safety glass because people may walk into,
fall against, or impact the glass. The position of the glass can therefore
change the required glass type even when the panel size is unchanged.
A practical glass rule should therefore check the complete situation: pane width,
pane height, glass area, wind load, support condition, glass type, safety location,
and the system's glazing pocket limitations.
Glass type affects safety, strength, thermal performance, sound reduction,
solar control, security, appearance, and cost. The correct glass type depends
on the product, opening size, wind load, safety requirements, climate, and
performance target.
In aluminum systems, glass should be treated as part of the system rather than
as a separate item. The frame, bead, gasket, glass pocket, setting blocks, and
hardware must all be compatible with the chosen glass thickness and glass build-up.
Annealed glass
Annealed glass is standard float glass. It is commonly used where safety
glass is not required and where the panel size, load, and location allow it.
When broken, it can form larger sharp pieces.
Toughened / tempered glass
Toughened glass is heat-treated to improve strength. It is stronger than
ordinary annealed glass and usually breaks into small granular pieces. It is
commonly used in doors, sliders, large openings, and safety glazing locations.
Laminated glass
Laminated glass is made from two or more layers of glass bonded with an
interlayer. If it breaks, the interlayer helps hold broken pieces together.
It is often used for safety, security, acoustic control, balustrades, and
overhead or higher-risk applications.
Heat-strengthened glass
Heat-strengthened glass is partially heat-treated. It is stronger than
annealed glass but not the same as fully toughened glass. It may be used
where improved strength or thermal stress resistance is required.
Insulated glass unit / IGU
An insulated glass unit is made from two or more panes separated by a spacer
and sealed around the edge. The cavity between the panes improves thermal
performance and can also help with acoustic performance.
Double glazing
Double glazing is an IGU with two panes of glass. It can improve insulation,
comfort, condensation control, and energy performance when combined with the
correct frame system and installation.
Low-E glass
Low-E glass has a special coating that helps control heat transfer. Depending
on the coating type, it can help reduce heat loss, reduce heat gain, or improve
the overall energy performance of the glazed opening.
Tinted glass
Tinted glass reduces visible light and solar heat entering through the glass.
It can help reduce glare and heat gain, but it also changes the appearance and
daylight level inside the building.
Reflective glass
Reflective glass has a coating that reflects more light and solar energy. It
can help with solar control and privacy, but the visual effect and reflectivity
must suit the project and surrounding environment.
Spandrel glass
Spandrel glass is opaque or non-vision glass used to hide building structure,
floor zones, insulation, or services. It is often used in commercial façades
where the outside appearance needs to remain consistent.
Glass selection should be checked together with the system's glazing capacity.
A frame designed for single glass may not automatically accept a thicker laminated
panel or insulated glass unit without different beads, gaskets, packers, or profile
combinations.
Safety glazing is glass selected to reduce the risk of injury if a person impacts
the glass or if the glass breaks. It is especially important in doors, low-level
glazing, large panels, wet areas, stairways, balustrades, and other high-risk
positions.
Safety requirements are based on where the glass is used, not only on the glass
size. A small pane in a hazardous location may need safety glass, while a larger
pane in a protected location may have different requirements.
Safety glass
Safety glass is glass that is designed to reduce injury risk when broken or
impacted. Common examples include toughened glass and laminated glass.
Hazardous location
A hazardous location is a position where people are more likely to walk into,
fall against, lean on, or impact the glass. These locations often require
safety glazing.
Door glazing
Glass in doors is commonly treated as a safety glazing location because doors
move, are handled frequently, and are located directly in the path of people.
Sidelights and adjacent panels
Glass next to doors may also require safety glazing, especially where it is
close to the walking path and could be mistaken for an opening or impacted
during normal use.
Low-level glazing
Low-level glass can be a safety concern because people may fall into it or
impact it at body height. The required glass type depends on the applicable
code and the exact position of the pane.
Wet areas
Bathrooms, showers, and similar wet areas often require safety glazing because
slipping, falling, and close body contact with glass are more likely.
Balustrades and barriers
Glass used as a barrier or guard must be selected for both impact safety and
structural performance. Laminated safety glass is commonly considered where
post-breakage retention is important.
Post-breakage behavior
Different glass types behave differently after breakage. Toughened glass
usually breaks into small pieces, while laminated glass tends to remain held
together by the interlayer.
Safety glazing should always be checked against the applicable building code,
project drawings, product use, and local requirements. The final glass selection
should consider both the risk of human impact and the structural demands on the
glass.
Energy performance describes how well a window, door, or glazed system controls
heat flow, solar heat gain, air leakage, daylight, and condensation risk. The
glass, aluminum profiles, gaskets, thermal breaks, spacers, and installation all
affect the final result.
Aluminum is strong and durable, but it conducts heat easily. For this reason,
energy performance depends heavily on the glass type, whether the system is
thermally broken, the quality of the seals, and whether the installation closes
air gaps around the frame.
U-value / U-factor
U-value measures how easily heat passes through a window, door, or glazing
system. Lower U-values indicate better insulation and less heat transfer
through the product.
R-value
R-value measures resistance to heat flow. Higher R-values indicate better
insulation. U-value and R-value are related, but they are opposite measures:
lower U-value is better, while higher R-value is better.
Solar Heat Gain Coefficient / SHGC
SHGC measures how much solar heat passes through the glass into the building.
A lower SHGC blocks more solar heat, while a higher SHGC allows more solar
warmth into the space.
Visible Transmittance / VT
Visible Transmittance measures how much visible daylight passes through the
glass. Higher VT allows more natural light into the building.
Low-E coating
Low-E glass has a special coating that helps control heat transfer. Depending
on the coating type, it can improve insulation, reduce solar heat gain, or
help balance comfort and daylight.
Insulated Glass Unit / IGU
An IGU uses two or more panes of glass separated by a sealed cavity. The cavity
helps reduce heat transfer and can improve comfort, condensation control, and
acoustic performance.
Thermal break
A thermal break is an insulating material placed between the inside and outside
parts of an aluminum profile. It reduces heat transfer through the frame.
Warm edge spacer
A warm edge spacer is used at the edge of an insulated glass unit to reduce
heat transfer around the glass edge. It can improve edge temperature and help
reduce condensation risk.
Air leakage
Air leakage is the uncontrolled movement of air through closed windows, doors,
or frame joints. Better sealing reduces drafts, dust, noise, and energy loss.
Condensation
Condensation forms when warm moist air meets a cold surface. Better glass,
thermal breaks, warm edge spacers, ventilation, and humidity control can help
reduce condensation risk.
Energy performance should be considered as a complete assembly. A high-performance
glass unit can still perform poorly if the aluminum frame is not suitable, the
gaskets do not seal properly, or the installation leaves air gaps around the frame.
Water management is one of the most important parts of aluminum system design.
A window, door, slider, or shopfront must deal with rain, wind-driven water,
condensation, drainage, and installation sealing. The goal is not only to block
water, but to control where water can go and how it drains back outside.
Aluminum systems usually manage water through a combination of gaskets, glazing
pockets, sill design, drainage channels, weep holes, sealant, pressure balance,
and correct installation. If one part of this water path is blocked or incorrectly
installed, the system can leak even if the profiles themselves are well designed.
Water penetration
Water penetration means water has passed through the intended weather barrier
and entered the building interior. It is usually caused by failed seals,
blocked drainage, incorrect fabrication, poor installation, or pressure-driven
water movement.
Sill drainage
The sill or threshold is the bottom part of the frame. It is one of the most
critical areas because water naturally runs downward. A good sill detail must
collect water and direct it safely back outside.
Weep holes
Weep holes are small drainage openings that allow water inside the outer part
of the system to escape. They must remain open and should not be blocked by
sealant, plaster, dirt, paint, debris, or incorrect installation.
Drainage channel
A drainage channel is a designed path inside the frame or sill that carries
water toward the weep holes. The channel must remain clear and must slope or
drain according to the system design.
Pressure equalization
Pressure equalization helps reduce the force that pushes water inward. Some
systems allow controlled air movement inside outer chambers so pressure can
balance and water can drain instead of being driven into the building.
Gaskets and weather seals
Gaskets and weather seals reduce water and air movement between glass, sash,
frame, and moving parts. They must be correctly positioned, continuous, and
compressed enough to seal without distorting the system.
Sealant joints
Sealant is used between the aluminum frame and the building opening, and
sometimes between system components. Correct sealant selection, joint size,
surface preparation, backing rod, and movement allowance are all important.
End dams
End dams are barriers at the ends of a sill or sub-sill that stop water from
escaping sideways into the wall or interior. They are especially important
where water can collect at the bottom of an opening.
Sub-sill
A sub-sill is an additional sill profile or support detail installed beneath
the main frame. It can help improve drainage, support, alignment, and the
connection between the aluminum system and the building waterproofing.
Installation waterproofing
The aluminum system must connect correctly to the building waterproofing.
Flashings, membranes, sealants, sill support, and wall finishes must work
together so water is directed outward, not into the wall.
Water management should always be checked as a complete path: rain contacts the
glass and frame, enters controlled outer areas if necessary, drains through the
sill, exits through weep holes, and is directed away from the building. Any blocked
or reversed part of that path can create a leak.
Air, dust, and acoustic performance are closely connected. Small gaps that allow
air movement can also allow dust, noise, moisture, and insects to pass through.
A window or door may look closed, but if the seals, gaskets, locks, rollers, or
installation joints are not working correctly, the opening can still perform badly.
Good performance depends on the complete assembly: glass, frame, sash, gaskets,
brushes, interlocks, hardware adjustment, installation sealant, and the building
opening around the frame.
Air infiltration
Air infiltration is unwanted air entering through a closed window, door, or
frame joint. It can cause drafts, dust entry, noise transfer, energy loss,
and reduced comfort.
Air leakage path
An air leakage path is any route where air can pass through the system. Common
paths include poor gasket contact, meeting stiles, interlocks, drainage paths,
frame corners, lock points, and the perimeter joint around the frame.
Gasket compression
Gasket compression is the pressure applied to a gasket when a window or door
is closed. Too little compression can allow air and water leakage. Too much
compression can make the product difficult to operate or distort the seal.
Brush seals
Brush seals are flexible pile seals often used in sliding systems. They help
reduce air movement, dust, and rattling, especially where moving panels must
slide past each other.
Interlock sealing
Interlock sealing happens where sliding panels meet. This area is critical
because two moving panels must overlap, align, lock, and seal without creating
excessive friction.
Hardware adjustment
Hardware affects sealing. Rollers, hinges, locks, keepers, friction stays,
and multipoint locking points must be adjusted so the sash or panel sits in
the correct position and presses evenly against the seals.
Acoustic performance
Acoustic performance is the ability of a system to reduce sound transmission.
It depends on glass type, glass thickness, laminated acoustic glass, air gaps,
frame sealing, gasket quality, and the installation joint around the frame.
Acoustic glass
Acoustic glass is usually laminated glass with an interlayer designed to reduce
sound transmission. It can improve noise control, but only if the frame and
installation are also well sealed.
Perimeter air seal
The perimeter air seal is the sealed joint between the aluminum frame and the
building opening. A good frame can still perform poorly if the perimeter joint
is not sealed correctly.
Rattling and vibration
Rattling can happen when panels, glass, beads, rollers, or hardware are loose
or poorly adjusted. Movement under wind or operation can reduce comfort and
may indicate a sealing or support problem.
Acoustic and air performance should be checked as a system. Upgrading only the
glass may not solve the problem if air can still pass through interlocks, gaskets,
frame corners, drainage paths, or the installation joint.
Structural system design deals with how the aluminum profiles, glass, hardware,
fixings, and building connection resist loads. The system must support its own
weight, glass weight, wind pressure, operating forces, and movement without
excessive bending, failure, leakage, or poor operation.
Strength is not only about using heavier aluminum. The shape of the extrusion,
profile depth, wall thickness, fixing positions, reinforcement, and load path
all affect how the system performs.
Load path
The load path is the route that forces follow through the system. Wind load
moves from glass into beads or sash profiles, then into frames, mullions,
fixings, packers, and finally into the building structure.
Profile depth
Profile depth is the front-to-back size of an extrusion. Deeper profiles can
often resist bending better and may provide more space for drainage, gaskets,
glass pockets, or reinforcing.
Wall thickness
Wall thickness is the thickness of the aluminum material in the extrusion.
Thicker walls can improve strength, screw holding, durability, and fabrication
reliability, but they also increase weight and cost.
Moment of inertia
Moment of inertia is a structural property that describes how well a profile
resists bending. The shape of the extrusion can be as important as the amount
of aluminum used.
Deflection limit
A deflection limit controls how much a profile may bend under load. The profile
may not break, but too much movement can affect glass support, water resistance,
air sealing, hardware operation, and appearance.
Mullion strength
Mullions often carry wind load from glass panels on both sides. Tall openings,
wide glass panels, exposed elevations, and high wind areas may require stronger
mullions or reinforced profiles.
Reinforcing
Reinforcing means adding steel, aluminum, or another structural insert to
improve profile strength. It is often used in large shopfronts, tall frames,
large sliders, couplers, or high-load conditions.
Couplers
Couplers join separate frames or systems together. A coupler must manage
alignment, movement, water resistance, air sealing, and structural load
transfer between connected frames.
Fixings and anchors
Fixings transfer load from the aluminum frame into the building. The spacing,
type, edge distance, corrosion resistance, and substrate strength all affect
the final performance.
Substrate strength
The substrate is the material the frame is fixed into, such as concrete,
masonry, steel, timber, or another frame. A strong aluminum system can still
fail if it is fixed into an unsuitable substrate.
A structural check should consider the complete assembly rather than only one
profile. Glass, beads, mullions, frame corners, hardware, fixings, packers, and
the building opening all work together.
Aluminum systems must allow for movement and real-world construction variation.
Buildings move, openings are not always perfectly square, materials expand and
contract, and fabrication has practical tolerances. A good system must allow for
these differences without losing performance.
Movement and tolerance issues often show up as hard-to-operate doors, poor lock
engagement, glass stress, water leaks, visible gaps, distorted frames, or panels
that no longer line up correctly.
Building movement
Buildings can move because of structural deflection, settlement, wind load,
thermal movement, slab movement, and normal construction behavior. Aluminum
systems must be installed so this movement does not damage the frame or glass.
Thermal expansion
Aluminum expands when heated and contracts when cooled. Long frames, tracks,
shopfront runs, and couplers must allow for this movement, especially in areas
exposed to direct sun or large temperature changes.
Fabrication tolerance
Fabrication tolerance is the acceptable variation in cutting, machining,
drilling, punching, gasket length, hole position, and assembly. The system
must define how accurate each workshop operation needs to be.
Installation tolerance
Installation tolerance is the acceptable variation when fitting the product
into the building opening. The opening may not be perfectly level, plumb,
square, or straight, so the installer must allow for controlled adjustment.
Clearance gap
Clearance gap is the space allowed between the frame and the building opening.
It provides room for positioning, packers, sealant, movement, and adjustment.
Too little clearance can force the frame out of shape.
Packers
Packers are support pieces placed between the frame and building opening.
They help position the frame, transfer load, prevent distortion, and support
the product at fixing points and load points.
Level
Level means horizontal alignment. Sills, tracks, and thresholds must normally
be installed level or according to the system design so water drains correctly
and sliding or folding panels operate properly.
Plumb
Plumb means vertical alignment. Side frames and mullions must be installed
upright so panels close correctly, locks line up, and loads transfer as
intended.
Square
Square means the frame corners are at correct right angles. A frame can be
level and plumb but still out of square. Checking diagonal measurements helps
confirm squareness.
Sealant movement allowance
Sealant joints must have enough width and depth to absorb movement between
the aluminum frame and the building. A joint that is too small or poorly
prepared can tear, debond, or leak.
Tolerance control starts before installation. The building opening, frame size,
cut sizes, glass sizes, hardware positions, fixing positions, and sealant joint
design must all work together. A technically good system can perform poorly if it
is forced into an opening without enough adjustment space.
Hardware is the group of mechanical components that make an aluminum system
operate, lock, adjust, carry load, and remain usable over time. Good hardware
selection is essential for sliding doors, folding systems, hinged doors, opening
windows, shopfront doors, and large glazed panels.
Hardware should be selected as part of the full system. Panel size, glass weight,
wind load, frequency of use, corrosion exposure, security requirements, and
maintenance access all affect which hardware is suitable.
Rollers
Rollers carry the weight of sliding panels and allow them to move along the
track. Roller capacity must match the panel weight, glass weight, track type,
and expected use. Poor roller selection can cause hard operation, track damage,
panel sag, and locking problems.
Tracks
Tracks guide sliding panels and carry roller loads. The track must be strong,
straight, clean, and compatible with the roller profile. Track drainage and
threshold detailing are also important for weather performance.
Locks
Locks provide security and help pull panels or sashes into their correct
closed position. In sliding systems, locks must align with keepers and work
together with interlocks, rollers, and panel adjustment.
Keepers
A keeper is the receiving part of a lock. The lock hook, latch, bolt, or
shoot bolt engages into the keeper. If the keeper is misaligned, the product
may not lock properly or may not compress the seals correctly.
Handles
Handles must suit the product type, lock type, panel weight, and user
requirements. A handle should be comfortable to use, secure, correctly fixed,
and suitable for the traffic level of the opening.
Hinges
Hinges carry the weight of hinged doors and some opening windows. Hinge
selection depends on sash or door weight, width, height, fixing method,
frequency of use, and corrosion environment.
Friction stays
Friction stays are hardware arms used on opening windows. They support the
sash while allowing it to open and remain in position. They must match the
sash size, sash weight, opening angle, and wind exposure.
Multi-point locking
Multi-point locking uses more than one locking point along a sash or door.
It can improve compression, security, and sealing, especially on taller or
larger panels.
Shoot bolts
Shoot bolts lock into the head or sill of a frame and are often used in
folding systems, hinged double doors, or secondary panels. Their positions
must line up accurately with the receiving holes or keeps.
Door closers
Door closers control how a hinged door closes. They are common in commercial
entrances and shopfront doors. The closer must suit the door weight, traffic
frequency, wind exposure, accessibility requirements, and desired closing speed.
Corrosion-resistant hardware
Hardware in coastal, wet, industrial, or high-pollution environments should
be selected with corrosion resistance in mind. Stainless steel, treated
components, suitable finishes, and maintenance routines may be required.
Adjustment
Many hardware items require adjustment after installation. Roller height,
lock position, keeper position, hinge alignment, and panel squareness can
affect operation, sealing, security, and long-term performance.
Hardware problems often appear as system problems. A sliding door that leaks air,
does not lock, or feels heavy may have an issue with roller adjustment, panel
alignment, keeper position, track cleanliness, or gasket compression rather than
with the aluminum profiles themselves.
The finish protects the aluminum and gives the system its final appearance.
Finish selection affects color, durability, corrosion resistance, maintenance,
cost, lead time, and long-term visual quality.
Aluminum systems are commonly finished by powder coating or anodizing. The best
option depends on project requirements, appearance, exposure conditions, warranty
expectations, and the fabricator or supplier's available finish process.
Powder coating
Powder coating is a painted finish applied as dry powder and baked onto the
aluminum surface. It is widely used because it provides a durable colored
finish and is available in many colors, textures, and gloss levels.
Anodizing
Anodizing is an electrochemical process that forms a controlled oxide layer
on the aluminum surface. It creates a metallic finish and becomes part of the
aluminum surface rather than sitting on top like paint.
Finish color
Finish color is the visible color of the aluminum profiles. Color choice can
affect appearance, heat absorption, maintenance, availability, and whether
touch-up or replacement parts are easy to match later.
Gloss level
Gloss level describes how reflective or matte the finish appears. Common
options include matt, satin, semi-gloss, and gloss. Lower gloss finishes can
look more architectural, while higher gloss finishes can show reflections more.
Textured finish
A textured finish has a slight surface texture rather than a perfectly smooth
surface. Textured finishes can help hide minor handling marks and are often
used for modern architectural systems.
Surface preparation
Surface preparation is the cleaning and chemical treatment before finishing.
Good preparation is critical for coating adhesion, corrosion resistance, and
long-term finish performance.
Film thickness
Film thickness is the thickness of the applied powder coating layer. Too little
coating may reduce protection, while too much coating can affect fit, clipping,
gasket grooves, bead engagement, or moving parts.
Paint perimeter
Paint perimeter is the outside perimeter of the extrusion that receives powder
coating. For costing, it usually focuses on the exposed or reachable outside
surfaces rather than hidden hollow cavities.
Anodizing perimeter
Anodizing perimeter can include more surface area than powder coating because
anodizing is an immersion process. Internal cavities and surfaces may be more
relevant when estimating anodizing area and cost.
Coastal exposure
Coastal exposure increases corrosion risk because salt in the air can attack
finishes and hardware. Coastal projects may require higher-grade surface
preparation, suitable coating systems, corrosion-resistant hardware, and more
regular cleaning.
Industrial exposure
Industrial environments can expose aluminum to pollution, chemicals, dust, or
aggressive airborne particles. Finish selection and maintenance requirements
should reflect the exposure level.
Maintenance cleaning
Finished aluminum should be cleaned regularly to remove salt, dirt, pollutants,
and deposits. The harsher the environment, the more important regular cleaning
becomes for maintaining appearance and finish life.
Finish performance depends on both the finish process and the environment. A
high-quality finish can still fail early if surface preparation is poor, the wrong
finish is selected for the exposure, or the product is not cleaned and maintained.
Fabrication is the workshop process of converting aluminum profiles, glass,
hardware, gaskets, and accessories into a finished window, door, slider,
shopfront, or folding system. Good fabrication depends on accurate cutting,
correct machining, clean assembly, correct sealing, and proper quality checks.
A strong system design can perform poorly if it is fabricated incorrectly.
Small errors in cut length, hole position, drainage slots, gasket placement,
sealant, or hardware alignment can create leaks, hard operation, poor locking,
glass stress, or visible quality problems.
Cutting list
A cutting list tells the fabricator which profiles must be cut, how many
pieces are required, and what length each piece must be. It may also include
angles, finish, project reference, opening number, and assembly notes.
Cut length
Cut length is the exact length a profile must be cut to. It is usually
calculated from the final frame or sash size, less or plus system-specific
allowances, deductions, overlaps, or joint details.
Deduction
A deduction is an amount subtracted from an overall size to calculate a
profile cut length, glass size, gasket length, or hardware position. Each
system has its own deduction rules.
Mitre cut
A mitre cut is an angled cut, commonly used at frame or sash corners. Accurate
mitres are important for clean appearance, tight joints, corner strength, and
water resistance.
Square cut
A square cut is a straight 90-degree cut. It is often used where profiles butt
into each other, connect with cleats, or form transom and mullion joints.
Machining
Machining includes drilling, punching, routing, slotting, notching, and
preparing holes or cut-outs in profiles. Machining is used for drainage,
locks, rollers, handles, screws, cleats, and hardware fixing.
Drainage slots
Drainage slots are machined openings that allow water to leave the system.
Their position and size must follow the system design so water drains outside
instead of collecting or moving inward.
Cleats and corner brackets
Cleats and corner brackets help connect profiles at corners or joints. They
provide alignment, strength, and screw fixing support. Incorrect cleat use can
weaken corners or cause poor alignment.
Corner sealing
Corner sealing is the sealing of frame or sash joints to prevent water and air
movement through the corners. It is especially important at sills, thresholds,
shopfront frames, and sliding systems.
Gasket fitting
Gaskets must be cut, inserted, and joined correctly. Poor gasket fitting can
cause glass movement, water leaks, air leaks, rattling, or difficulty clipping
in beads.
Glazing
Glazing is the process of fitting glass into the frame or sash. It includes
setting blocks, glass positioning, gaskets, beads, packers, and checking that
the glass has correct bite and clearance.
Quality check
A fabrication quality check should confirm cut sizes, frame squareness,
diagonal measurements, drainage, hardware operation, lock alignment, gasket
fit, glass support, visible finish quality, and final labeling.
Good fabrication is repeatable. The clearer the system rules, cutting formulas,
machining positions, and assembly instructions are, the easier it is for a
workshop to produce consistent products with fewer mistakes and less waste.
Installation is the process of fixing the finished aluminum product into the
building opening. A correctly designed and fabricated system can still fail if it
is installed out of level, out of square, poorly sealed, badly fixed, or without
correct support.
Good installation must control alignment, structural fixing, load transfer,
waterproofing, sealant joints, drainage, movement, and final adjustment. The frame
must work with the building opening rather than being forced into it.
Opening preparation
The building opening should be checked before installation. Width, height,
squareness, level, plumb, substrate condition, waterproofing, clearance, and
fixing surfaces should all be suitable before the frame is installed.
Level sill
The sill or threshold must be installed level or according to the system
design. This is especially important for sliding doors, folding systems, water
drainage, and roller performance.
Plumb side frames
Side frames must be vertically aligned. If the sides are not plumb, panels can
drift, locks can miss their keepers, sashes can bind, and gaps can appear.
Square frame
The frame should be square, meaning the corners form correct right angles.
Diagonal measurements are commonly used to confirm that the frame has not been
twisted or racked during installation.
Fixings
Fixings hold the frame to the building structure. The fixing type, spacing,
embedment, edge distance, corrosion resistance, and substrate strength must
suit the system and project loads.
Packers
Packers support the frame at fixing and load points. They prevent the frame
from being pulled out of shape when screws or anchors are tightened, and they
help transfer load into the building.
Perimeter clearance
The gap between the frame and the building opening must allow for positioning,
packers, sealant, movement, and tolerance. Too little clearance can distort the
frame or prevent a proper sealant joint.
Perimeter seal
The perimeter seal closes the joint between the aluminum frame and the building.
Correct sealant, backing rod, surface preparation, joint depth, joint width, and
movement allowance are all important for long-term performance.
Flashing and waterproofing
Flashing and waterproofing details direct water away from the building opening.
The aluminum frame, sill, sub-sill, wall membrane, plaster, cladding, and sealant
must work together as one water-management detail.
Drainage protection
Drainage slots, weep holes, sill paths, and sub-sill drainage must remain open
after installation. They should not be blocked by sealant, plaster, debris,
packers, or floor finishes.
Final adjustment
After installation, opening parts should be adjusted. Rollers, hinges, locks,
keepers, friction stays, gaskets, and panel alignment should be checked so the
system operates and seals correctly.
Handover check
A good handover check confirms operation, locking, drainage, visible finish,
glass condition, sealant quality, cleaning, maintenance instructions, and any
project-specific requirements.
Installation should be treated as part of the system, not an afterthought. The
product, opening, fixings, packers, sealant, waterproofing, and final adjustment
all determine whether the installed system performs as intended.
System compatibility means that related aluminum systems are designed to work
together. A window system, patio slider, shopfront frame, and folding system may
have different functions, but they can still share logic, dimensions, accessories,
connection details, and installation principles.
Compatibility is important because it reduces unnecessary complexity. It helps
fabricators stock fewer unique parts, quote more consistently, train staff more
easily, and produce cleaner junctions between related products.
Compatible system family
A compatible system family is a group of products designed to relate to each
other. The systems do not need to be identical, but they should connect,
align, or share logic where it is practical.
Shared profile logic
Shared profile logic means that profiles are designed with related depths,
glazing lines, fixing zones, bead principles, drainage concepts, or connection
dimensions. This makes the range easier to understand and expand.
Common accessories
Common accessories are parts that can be reused across more than one system.
Examples may include gaskets, screws, setting blocks, glazing packers, end
caps, adaptors, cleats, or selected hardware items.
Adaptor
An adaptor is a profile or component used to connect one system or condition
to another. Adaptors help bridge differences in depth, alignment, fixing,
water management, or appearance.
Coupler
A coupler joins two frames or system sections together. It must manage
alignment, fixing, water resistance, air sealing, movement, and structural
load transfer between the connected parts.
Glazing line
The glazing line is the visual and technical position of the glass within
the frame. Compatible systems often try to align glazing lines so connected
products look intentional and clean.
Frame depth alignment
Frame depth alignment helps different systems sit together neatly. If depths
differ too much, the connection may need special adaptors, packers, flashings,
cover plates, or custom trim details.
Water path compatibility
When systems connect, their water paths must not conflict. Drainage from one
system should not discharge into another system incorrectly or into the
building interior.
Hardware clearance
Compatible systems must allow enough space for rollers, hinges, locks,
handles, keepers, interlocks, and operating parts. A connection that looks
good visually can still fail if hardware movement is blocked.
Stock simplification
Stock simplification is one of the main benefits of compatibility. Reusing
selected profiles and accessories across systems can reduce inventory,
training, picking errors, and fabrication complexity.
ERP and quoting compatibility
Compatible systems are easier to represent in a quoting or ERP system because
shared rules, shared accessories, and shared calculations can be reused across
product families.
Compatible does not mean every product must connect to every other product in
every configuration. Some products may be compatible only in selected versions.
For example, a practical two-track patio slider may connect into a shopfront
frame, while a larger three-track patio variant may need to remain a standalone
large-opening solution.
Shopfront and commercial framing systems are used for larger glazed elevations,
entrance screens, retail fronts, office partitions, showrooms, commercial doors,
and framed fixed glazing. These systems usually carry larger glass areas and may
need stronger mullions, better anchoring, commercial hardware, and more careful
water management than light residential systems.
A shopfront system is often the backbone for other connected products. It may need
to accept doors, fixed panels, top lights, side lights, couplers, adaptors, folding
systems, or selected patio slider integrations.
Shopfront system
A shopfront system is a commercial aluminum framing system used to create
glazed elevations and entrance screens. It typically includes frames, mullions,
transoms, beads, door adaptors, glazing gaskets, and fixing details.
Commercial frame
A commercial frame is generally designed for larger glass areas, stronger
fixings, heavier use, and more demanding project conditions than a light
residential frame.
Entrance screen
An entrance screen is a framed glazed assembly that includes a door or doors
together with fixed side lights, top lights, or shopfront framing around the
door opening.
Commercial door
A commercial door is usually designed for higher traffic and more frequent use.
It may require stronger hinges, a door closer, commercial locks, threshold
control, kick plates, pull handles, panic hardware, or access-control hardware.
Top light
A top light is a glazed panel above a door, window, or framed opening. In
shopfronts, top lights are often separated from the lower opening by a transom.
Side light
A side light is a glazed panel beside a door or opening. Side lights may need
safety glazing depending on their location, size, height from floor level, and
relationship to the entrance path.
Transom rail
A transom rail is the horizontal profile that separates glass areas or divides
a door bay from a top light. It can also help transfer load into surrounding
mullions or frames.
Commercial mullion
A commercial mullion is a vertical structural divider between glass panels or
door bays. It may need to resist wind load from multiple panels and transfer
that load safely into the head, sill, and building fixings.
Door adaptor
A door adaptor is a profile used to connect a door frame or door leaf into the
surrounding commercial frame. Adaptors help manage alignment, fixing, hardware
clearance, and visual consistency.
Threshold detail
The threshold detail controls the bottom of a commercial door or shopfront
opening. It must consider access, weathering, drainage, floor finish height,
traffic, door clearance, and durability.
High-traffic durability
Commercial entrances are often used more frequently than residential openings.
Hardware, fixings, doors, pivots, closers, handles, and thresholds should be
selected for expected traffic and maintenance conditions.
Shopfront integration
Shopfront systems often need to integrate with other product families such as
folding systems, selected sliders, fixed windows, access-control doors, or
internal partition framing. The connection details must address structure,
weathering, appearance, and operation.
A good commercial framing system is not only a set of large profiles. It is a
platform that must coordinate structure, glazing, water management, door hardware,
accessibility, safety glazing, fixing, and compatibility with related systems.
Sliding systems use panels that move horizontally along tracks. They are commonly
used for patio doors, large openings, balcony doors, shopfront integrations, and
entertainment areas where wide openings and clean sightlines are important.
A sliding system must manage panel weight, glass size, rollers, tracks, interlocks,
locking, water drainage, weather seals, threshold height, panel adjustment, and
long-term maintenance. Large sliders are especially sensitive to track level,
roller capacity, and frame alignment.
Sliding panel
A sliding panel is the moving glazed section of the system. It usually carries
glass, rollers, interlock profiles, locks, handles, and weather seals.
Fixed panel
A fixed panel does not slide. It may be glazed directly into the outer frame
or built as a fixed sash/panel depending on the system design.
Track
The track is the bottom rail or channel that guides the sliding panel. Tracks
must support roller loads, remain clean, manage drainage, and stay level for
smooth operation.
Roller capacity
Roller capacity is the maximum weight that the rollers can safely carry.
Panel size, glass thickness, glass type, hardware weight, and expected use
all affect the roller selection.
Interlock
The interlock is the meeting detail between sliding panels. It helps close the
gap between panels and contributes to sealing, security, alignment, and wind
resistance.
Meeting stile
A meeting stile is the vertical profile where two panels meet. In sliding
systems, the meeting stile often works together with interlocks, locks, brush
seals, and keepers.
Two-track slider
A two-track slider has two sliding lanes. It can support common arrangements
such as one sliding and one fixed panel, two sliding panels, or larger
configurations depending on the system design.
Three-track slider
A three-track slider has three sliding lanes. It allows more panels to move
and stack, which can create larger clear openings and more flexible opening
configurations.
All-sliding configuration
An all-sliding configuration means every panel can move. This gives flexibility
but requires careful track logic, locking positions, sealing details, panel
stops, and drainage design.
Threshold
The threshold is the bottom part of the sliding system. It must manage rollers,
walking access, weather resistance, drainage, track strength, and floor finish
coordination.
Flush threshold
A flush threshold is designed to reduce the step between inside and outside
floor levels. It can improve accessibility and appearance, but it needs careful
drainage and waterproofing design.
Panel adjustment
Sliding panels usually need roller adjustment after installation. Correct
adjustment helps panels sit square, lock correctly, seal evenly, and move
smoothly.
Brush seals and gaskets
Brush seals and gaskets reduce air, dust, water, and noise movement between
panels and frame parts. Sliding systems must seal while still allowing panels
to move freely.
Panel stop
A panel stop controls where the sliding panel stops when opened or closed.
Stops protect hardware, prevent over-travel, and help position panels correctly.
Sliding systems should be evaluated as moving assemblies. The system may have
strong profiles and good glass, but operation will still suffer if tracks are not
level, rollers are overloaded, locks are misaligned, drainage is blocked, or panels
are not adjusted correctly.
Folding and stacking systems use multiple hinged panels that fold together and
stack to one side or both sides of an opening. They are used where a wide opening
is needed, such as patios, restaurants, entertainment areas, shopfront openings,
and large residential or commercial spaces.
These systems are more mechanically complex than simple fixed frames or sliding
doors. They must coordinate panel weight, hinge positions, rollers or carriers,
track alignment, locking points, drainage, weather seals, stacking space, and
final adjustment.
Folding panel
A folding panel is one hinged leaf in the system. Each panel carries glass,
hinges, seals, and sometimes locks, rollers, guides, or handles depending on
the system design.
Stacking
Stacking is the way folded panels gather to one side or both sides of the
opening. Stacking space must be allowed for in the building design so panels
do not block walls, furniture, handles, columns, or walkways.
Top-hung system
In a top-hung system, most of the panel weight is carried by the head track
and top carriers. The structure above the opening must be able to support the
panel loads.
Bottom-rolling system
In a bottom-rolling system, most of the panel weight is carried by rollers at
the bottom track. The sill or threshold must be strong, level, clean, and
correctly supported.
Hinges
Hinges connect folding panels to each other and control how they fold. Hinge
selection depends on panel weight, panel height, panel width, frequency of use,
and corrosion exposure.
Carrier / guide
A carrier or guide controls panel movement along the track. It may carry
weight, guide alignment, or prevent panels from moving out of position during
operation.
Traffic door
A traffic door is one panel that can operate like a normal hinged door without
opening the full folding set. It is useful for daily access where the full
opening is not always needed.
Panel width
Panel width affects panel weight, stacking projection, hinge load, ease of
operation, glass size, and wind performance. Very wide panels may become heavy
and more difficult to control.
Panel height
Panel height affects weight, wind load, deflection, hinge stress, and stacking
behavior. Taller panels may require stronger profiles, better carriers, and
more careful adjustment.
Locking points
Folding systems often use multiple locking points, including main locks, shoot
bolts, flush bolts, or intermediate locks. These must align accurately with the
head, sill, and adjacent panels.
Weather sealing
Weather sealing in folding systems is challenging because many panel joints
move. Gaskets and seals must reduce air and water movement while allowing the
panels to fold and stack without excessive friction.
Threshold drainage
Folding systems must manage water at the threshold. Low or flush thresholds
can improve access and appearance, but they need careful drainage and
waterproofing design.
Final adjustment
Folding systems usually require careful adjustment after installation. Panel
gaps, hinge alignment, carrier height, lock engagement, gasket compression,
and stacking behavior all need to be checked.
Folding systems perform best when the opening is prepared accurately and the frame
is installed level, plumb, and square. Small installation errors can multiply across
multiple panels and cause poor stacking, difficult operation, misaligned locks, or
uneven seals.
Pricing and costing connect the technical aluminum system to the commercial
system. A quote must account for aluminum, glass, hardware, gaskets, accessories,
finishing, labor, installation, delivery, waste, markups, discounts, and project
risk.
A good costing model should separate supplier cost, fabricator cost, fabrication
markup, client selling price, and profit margin. This makes it easier to understand
where money is being made or lost and which variables affect the final price.
Material cost
Material cost is the cost of the physical components used in the product. This
can include aluminum extrusions, glass, hardware, gaskets, screws, accessories,
finishing, packaging, and consumables.
Supplier cost
Supplier cost is the cost charged by the system house or supplier to the
fabricator. It may include extrusion costs, finish costs, hardware costs,
glass costs, stock charges, delivery, and supplier-level markups.
Fabricator cost
Fabricator cost is the fabricator's true cost to produce or supply the final
item. It includes supplier cost plus workshop labor, wastage, installation
cost, delivery, overhead recovery, and any project-specific costs.
KG/M
KG/M means kilograms per meter. It tells you how heavy an extrusion is for
each meter of length. It is used to calculate aluminum weight, extrusion cost,
stock value, transport weight, and sometimes finish cost.
Bar length
Bar length is the supplied stock length of an extrusion. Common stock lengths
are cut into shorter fabrication pieces. Bar length affects optimization,
offcut management, waste, and stock control.
Waste factor
Waste factor allows for material that cannot be used in the final product.
Waste can come from saw cuts, offcuts, defects, optimization limits, mitre
losses, minimum usable offcut rules, and project batching.
Cutting optimization
Cutting optimization is the process of grouping required cut lengths into
stock bars to reduce waste. Better optimization can reduce aluminum cost and
improve stock usage.
Finish cost
Finish cost is the cost of powder coating, anodizing, or another surface
finish. It may depend on surface area, paint perimeter, anodizing perimeter,
color, batch size, minimum charges, and special exposure requirements.
Paint perimeter
Paint perimeter is the outside perimeter of the extrusion used to estimate
powder coating area. It normally focuses on surfaces reached by the coating
process and excludes hidden internal hollow cavities.
Anodizing perimeter
Anodizing perimeter can include internal surfaces because anodizing is an
immersion process. This can make anodizing perimeter higher than paint
perimeter for hollow or complex extrusions.
Labor cost
Labor cost is the cost of workshop and installation time. It may be calculated
per item, per square meter, per opening, per hour, per system type, or by a
more detailed operation-based costing method.
Markup
Markup is the amount added to cost to calculate selling price. If an item costs
100 and a 25% markup is added, the selling price becomes 125.
Margin
Margin is profit as a percentage of the selling price. Markup and margin are
not the same. If cost is 100 and selling price is 125, the profit is 25, the
markup is 25%, and the margin is 20%.
Discount group
A discount group is a pricing category used to apply different discounts or
price rules to different clients. It can help separate retail clients, trade
clients, contractors, developers, and preferred partners.
Project risk allowance
Project risk allowance is an added cost or margin used to cover complexity,
difficult site access, special colors, unusual sizes, high wind exposure,
custom details, or uncertain project conditions.
A reliable pricing system should show where each cost comes from and which variable
controls it. This makes the quote easier to audit, easier to adjust, and easier to
improve over time.
A good aluminum system needs clear documentation. The documentation turns the
system from a set of profiles and parts into something that can be quoted,
fabricated, installed, checked, maintained, and improved.
Documentation should serve multiple users: system suppliers, fabricators,
estimators, workshop staff, installers, project managers, sales teams, and support
staff. Each group needs different information, but the information should come
from the same controlled system logic.
System overview
A system overview explains what the system is used for, what product family it
belongs to, what configurations it supports, and where its limits are.
Profile list
A profile list identifies each extrusion in the system. It should include the
profile code, description, system use, KG/M, finish information, stock logic,
and whether the profile is shared with other systems.
Extrusion drawings
Extrusion drawings show the profile cross-sections. They are used for design,
fabrication, 3D modeling, costing, die control, stock identification, and
technical support.
KG/M data
KG/M data shows how heavy each extrusion is per meter. It supports aluminum
costing, stock valuation, transport weight, optimization, and system comparison.
Paint perimeter and anodizing perimeter
Finish perimeter data helps estimate coating or anodizing cost. Paint perimeter
usually focuses on exterior reachable surfaces, while anodizing perimeter may
include internal surfaces because of the immersion process.
Hardware list
A hardware list defines rollers, locks, handles, hinges, friction stays, shoot
bolts, screws, keepers, closers, and other operating parts required by the
system.
Gasket and accessory list
Gaskets, brushes, setting blocks, cleats, end caps, packers, corner keys,
adaptors, drainage caps, and other accessories should be listed clearly so
the fabricator can order and assemble correctly.
Fabrication manual
A fabrication manual explains how to cut, machine, assemble, seal, glaze, and
check the product. It should include formulas, machining positions, drainage
details, hardware positions, and assembly sequence.
Cutting formulas
Cutting formulas convert final sizes into profile cut lengths, glass sizes,
gasket lengths, and accessory quantities. These formulas must match the real
system details used in the workshop.
Configuration rules
Configuration rules define which layouts are possible. For example, a slider
system may support two-track, three-track, fixed-and-sliding, or all-sliding
configurations depending on the system design.
Installation guide
An installation guide explains how the product should be placed, packed, fixed,
sealed, drained, adjusted, and handed over. It should also explain common
mistakes that can reduce performance.
Performance data
Performance data can include wind loading, water resistance, air leakage,
acoustic performance, energy performance, safety limits, glass capacity, and
test references where available.
ERP item codes
ERP item codes connect the technical system to stock, quoting, purchasing,
costing, cutting lists, supplier pricing, and reporting. Good codes reduce
mistakes and make the system easier to maintain.
Revision control
Revision control records changes to profiles, formulas, hardware, pricing,
manuals, drawings, and rules. It helps avoid old information being used after
the system has been updated.
Complete documentation reduces support load and improves consistency. It helps a
fabricator understand not only what to use, but why each part is used and how it
affects performance, cost, stock, and installation.
Technical information is useful for understanding aluminum systems, but final
product selection must always be checked against the actual project conditions.
A system that is suitable for one project may not be suitable for another project
with different wind loads, glass sizes, exposure, building height, usage, or code
requirements.
Compliance review is the process of confirming that the selected aluminum system,
glass, hardware, fixing method, installation detail, and performance assumptions
are appropriate for the specific project.
Project-specific review
A project-specific review checks the actual building conditions rather than
relying only on general system information. It considers the location, building
type, opening sizes, exposure, height, use, safety requirements, and installation
conditions.
Applicable building code
The applicable building code is the set of legal or regulatory requirements
that apply to the project. It may define requirements for wind loading, safety
glazing, energy performance, accessibility, fire, fall protection, and other
project conditions.
Local standards
Local standards are the technical rules, test methods, or product requirements
used in a specific country, state, region, or market. These standards should be
checked before confirming product suitability.
Engineering sign-off
Engineering sign-off is a formal review by a qualified professional where
required. It may be needed for large openings, high wind loads, structural
mullions, custom connections, balustrades, overhead glazing, or unusual project
conditions.
System test data
System test data records how a product or system has performed under test
conditions. Test data may include air leakage, water resistance, structural
pressure, operating force, impact, acoustic performance, or energy performance.
Product limitation
A product limitation defines the boundary of what the system is intended to do.
Limitations may include maximum panel size, maximum glass thickness, maximum
height, maximum width, hardware capacity, wind pressure, or configuration rules.
Safety glazing compliance
Safety glazing compliance confirms that the glass type is suitable for the
location and risk condition. Doors, sidelights, low-level glass, bathrooms,
stairways, balustrades, and high-impact areas may require specific safety glass.
Wind load compliance
Wind load compliance confirms that glass, profiles, mullions, couplers,
fixings, and installation details can resist the required project wind
pressures without excessive deflection or failure.
Energy compliance
Energy compliance checks whether the selected glass and frame assembly meets
the required thermal or solar performance for the project. This may involve
U-value, SHGC, air leakage, frame type, and installation sealing.
Accessibility requirements
Accessibility requirements may affect threshold height, door clear opening,
handle height, operating force, entrance design, and circulation around the
opening. Commercial and public buildings may have stricter requirements.
Fire and life-safety requirements
Some openings may be affected by fire, smoke, emergency egress, panic hardware,
or life-safety requirements. These requirements must be checked before assuming
that a standard aluminum system is suitable.
Site condition check
A site condition check confirms that the real opening matches the assumptions
used in the quote and design. The opening should be checked for size, level,
plumb, square, substrate strength, waterproofing, access, and installation
clearance.
Maintenance requirements
Compliance and performance do not end at handover. Finishes, rollers, locks,
tracks, drains, gaskets, sealants, and hardware may require cleaning,
inspection, adjustment, or replacement over time.
This technical resource page is intended as guidance and terminology support.
It does not replace project-specific design review, local code compliance,
manufacturer limitations, system test data, or professional engineering advice
where required.