Technical information notice. Technical information on this page is general product-selection guidance, not a certification, compliance statement, design calculation or order confirmation. Before relying on a figure or standard, request current evidence for the selected product route, size, glazing, hardware and project. See our technical information.
Guide
How big can aluminium doors and windows go?
Aluminium goes large where uPVC and timber stop. Across our systems, bifold leaves run to 1.2 x 3.0m (a traffic leaf to 130kg on four hinges), sliding sashes to 2.5 x 3.0m at 300kg on lift-and-slide, casements to 1.37 x 2.4m at 180kg on heavy-duty hinges, and curtain walling panels to 1500mm wide at 250kg. The figures below are real per-system maximums, given as "up to" and "from". Whole-unit performance is confirmed at quote, because the limit on any one opening is the interaction of width, height, weight, glass make-up and exposure, not a single headline number.
Verified maximumsReal per-system figures: width x height, weight, leaves and clear opening
Trade fabricatorWe fabricate and supply the trade; homeowners routed to vetted installers
Confirmed at quoteWhole-unit limits validated against glass, weight and exposure
What are the maximum aluminium door and window sizes by system?
Each system has its own maximum leaf, sash or unit size, governed by frame depth, hardware rating and glass weight. Use the figures below as the ceiling for a single element, then confirm the whole unit at quote. Size and weight figures are stated as "up to". A U-value is the figure in that system's own table at the glass named, confirmed at quote for your opening; where none is published, it is confirmed at quote.
Request current product evidence for the selected route, size, glazing, hardware and project before relying on the specification.
| Bifold doors | leaves up to 1.2 x 3.0m, a traffic leaf up to 130kg on four hinges, up to 14 leaves per run, around 90% clear opening. |
|---|---|
| Sliding doors | sashes up to 2.5 x 3.0m at up to 300kg per sash on lift-and-slide (280kg in-line), 35mm interlock, around 50 to 65% clear opening, Uw confirmed at quote. |
| Casement windows | up to 1.37 x 2.4m at up to 180kg on heavy-duty hinges. |
| Tilt-turn windows | sashes up to 1.725 x 2.3m at up to 130kg with the heavy-duty kit. |
| Entrance doors | leaves up to 1.2 x 2.4m. |
| Heritage windows | side-hung sashes up to 0.75 x 1.4m and top-hung up to 1.4 x 1.4m, Uw confirmed at quote. |
| Steel-look screens and doors | internal leaves up to 1.0 x 2.6m at up to 80kg; external leaves sized at quote. |
| Curtain walling | panels up to 1500mm wide at up to 250kg, heights to 4000mm, 62mm frame system, Ucw confirmed at quote. |
How big can aluminium bifold doors go?
Aluminium bifold leaves run up to 1.2m wide by 3.0m tall, with a traffic leaf up to 130kg on four hinges and up to 14 leaves in a single run. That gives an expansive opening with around 90% clear width when the leaves are stacked. Tall, heavy leaves shift more load onto the track and hardware, so the exact leaf count and weight per leaf are confirmed at quote against the chosen glass make-up.
See the full range on products or compare formats at bifold vs sliding doors.
| Max leaf size | up to 1.2 x 3.0m |
|---|---|
| Max weight | up to 130kg for a traffic leaf on four hinges |
| Max leaves per run | up to 14 |
| Clear opening | around 90% |
| Thermal | Uw 1.45 W/m²K with Ug 1.0 glass, 1.2 with Ug 0.7 glass, confirmed at quote for your opening |
How big can aluminium sliding doors go?
Aluminium sliding sashes go larger and heavier than any bifold leaf, up to 2.5m wide by 3.0m tall at up to 300kg per sash on lift-and-slide (280kg in-line), on a 35mm interlock. Clear opening lands around 50 to 65% depending on configuration, because one sash slides behind another rather than folding away. Uw is confirmed at quote for the size and glass. The 300kg lift-and-slide figure is a sash maximum, not a guarantee for every opening; glass specification and panel layout set the real limit, confirmed at quote.
| Max sash size | up to 2.5 x 3.0m |
|---|---|
| Max weight | up to 300kg per sash (lift-and-slide) |
| Interlock | 35mm |
| Clear opening | around 50 to 65% |
| Thermal | Uw confirmed at quote |
How big can aluminium casement and tilt-turn windows go?
Aluminium casements go up to 1.37m wide by 2.4m tall at up to 180kg on heavy-duty hinges, on the system we fabricate. Tilt-turn sashes run up to 1.725m wide by 2.3m tall at up to 130kg with the heavy-duty kit. Large vents put significant load on hinges and the locking line, so for the biggest openings the weight, glass weight and hardware are validated at quote rather than assumed from the headline size.
More on glazing and thermal performance at energy efficiency and aluminium U-values.
| Casement max | up to 1.37 x 2.4m at up to 180kg on heavy-duty hinges |
|---|---|
| Tilt-turn thermal | Uw 1.4 W/m²K double-glazed (Ug 1.0), 1.2 triple-glazed (Ug 0.7), confirmed at quote for your opening |
| Glazing | 22 to 52mm by system |
| Weather | air permeability Class 4, watertightness to Class 9A, wind resistance to Class C5 |
How big can aluminium entrance, heritage and steel-look units go?
Entrance doors run up to 1.2m wide by 2.4m tall. Heritage windows take side-hung sashes up to 0.75 x 1.4m and top-hung up to 1.4 x 1.4m, holding a slim traditional sightline, with Uw confirmed at quote. Steel-look screens and doors take internal leaves up to 1.0m wide by 2.6m tall at up to 80kg, for tall slim-framed glazed runs; external steel-look leaves are sized at quote. Each is a single-element maximum; the working size for a given opening is set against weight, glass and exposure at quote.
Browse formats on products or start a spec at quote.
| Entrance doors | up to 1.2 x 2.4m |
|---|---|
| Heritage windows | sashes up to 1.4 x 1.4m, Uw at quote |
| Steel-look leaves | internal up to 1.0 x 2.6m at up to 80kg; external sized at quote |
How big can aluminium curtain walling go?
Aluminium curtain walling carries panels up to 1500mm wide at up to 250kg, at heights to 4000mm, on a 62mm frame system, with Ucw confirmed at quote for your glazing and typology. It is classified to EN 13830 for air permeability, watertightness and wind resistance, and the classes your elevation needs are confirmed at quote. For full-height glazed facades the panel size, weight and fixing are engineered to the building, so the maximum is confirmed against the project at quote.
| Max panel | up to 1500mm wide at up to 250kg, heights to 4000mm |
|---|---|
| Frame system | 62mm |
| Thermal | Ucw confirmed at quote |
| Standards | EN 13830; air, water and wind classes confirmed at quote |
What limits the maximum size of an aluminium opening?
The real limit on any opening is the interaction of width, height, weight, glass make-up and exposure, not a single headline number. A leaf can hit its size maximum or its weight maximum first, depending on the glass. Thicker acoustic or triple glazing adds weight that can pull a large leaf below its dimensional ceiling.
Exposure matters too: every system is tested for air permeability to Class 4 (EN 12207), watertightness to Class 9A (EN 12208) and wind resistance to Class C5 (EN 12210), with acoustic performance to Rw 46 dB and durability to 50,000 cycles (EN 12400). PAS 24 routes are available where security is specified.
Because of these trade-offs, every whole unit is confirmed at quote.
See security for how a PAS 24 route is specified, or send your sizes via quote. Homeowners are routed to vetted installers through find an installer; trade buyers start at trade.
| Glazing weight | 22 to 52mm by system, heavier units reach the weight limit before the size limit |
|---|---|
| Weather and wind | air permeability Class 4, watertightness to Class 9A, wind resistance to Class C5 |
| Acoustic | to Rw 46 dB where specified |
| Durability | 50,000 cycles (EN 12400) |
| Security | PAS 24 routes where specified |
Common questions
What is the biggest aluminium door you can get?
The largest single element is a sliding sash up to 2.5m wide by 3.0m tall at up to 300kg on lift-and-slide, on a 35mm interlock with Uw confirmed at quote. Bifold leaves reach 1.2 x 3.0m, with a traffic leaf up to 130kg on four hinges and up to 14 leaves per run for the widest overall opening. The working maximum for any one door is confirmed at quote against glass and exposure.
How wide can aluminium bifold doors open?
Aluminium bifold doors take leaves up to 1.2m wide by 3.0m tall, a traffic leaf up to 130kg on four hinges, with up to 14 leaves in a single run and around 90% clear opening when stacked. The exact leaf count and weight per leaf are confirmed at quote against the chosen glass.
How heavy can an aluminium sliding sash be?
A single aluminium sliding sash can run up to 300kg on lift-and-slide (280kg in-line), sized up to 2.5 x 3.0m on a 35mm interlock, with around 50 to 65% clear opening. The 300kg lift-and-slide figure is a sash maximum, not a guarantee for every opening; the real limit is set by glass make-up and panel layout, confirmed at quote.
How big can aluminium curtain walling panels be?
Aluminium curtain walling carries panels up to 1500mm wide at up to 250kg, at heights to 4000mm, on a 62mm frame system, with Ucw confirmed at quote. It is classified to EN 13830 for air permeability, watertightness and wind resistance, with the classes for your elevation confirmed at quote. Panel size and fixing are engineered to the building and confirmed at quote.
Why are aluminium maximum sizes given as up to and from?
Because the limit on any opening is the interaction of width, height, weight, glass make-up and exposure, not one fixed number. A leaf can reach its size maximum or its weight maximum first depending on the glass, and exposure sets the weather and wind requirement. So sizes are given as up to, U-values as from, and every whole unit is confirmed at quote.
Related guidance
Continue your project research
Relevant product routes
Explore the product range
Verified business details
VITRINEALU LTD
- Companies House
- Company number 12927857
- Fabrication works
- Unit 1 Nassau Business Park, Bahama Road, Haydock, St Helens, WA11 9FW
- Membership
- Council for Aluminium in Building member
- Phone
- 0330 133 3622