Specification support
The junction you detailed is the junction we fabricate. We advise on the product route that meets the sightline, performance and finish you have specified, without value-engineering surprises.
Architects and specifiers
Drawing-led answers for specification.
Send the detail you have drawn for windows, doors, curtain walling or internal glazed screens. We confirm a product route that holds it. Before we make anything, we check that route against your drawing and name the documents your project needs.
Fabricated in Haydock, St HelensTrade-only supply from our own workshop.
Evidence with the estimateCurrent test documents for the configuration you specify, sent at quote.
Performance requirements
Thermal, security, weather and acoustic targets are reviewed for the actual opening, glazing, hardware and exposure. A generic website value is never a project guarantee.
Documentation
Ask for the current evidence relevant to the selected route before fabrication, ordering or relying on a claimed performance. Installation and final sign-off remain with the responsible project parties.
Specification reference
The figures behind the figures
Every performance number on this site traces to a standard and a tested configuration. These set out which standard, what it measures, and what the class is tied to, so a value can be specified rather than assumed.
- How big can aluminium doors and windows go?What a leaf can actually span before the system stops you.
- Aluminium U-Values ExplainedWhich U-value you are specifying, and what it is measured across.
- Aluminium window and door weather ratings explainedAir, water and wind classes, and the size each one was achieved at.
- PAS 24 security explained for aluminium doors and windowsWhat the enhanced-security test proves, and what it does not.
- What is EN 13830 curtain walling?The product standard for non-loadbearing framing.
- Acoustic aluminium windows: how Rw ratings workHow Rw is reached, and where laminated or asymmetric glazing earns it.
| Product | Frame | Max leaf or panel (w x h) | Max weight | U-value, W/m²K, at the glass Ug shown | Security route |
|---|---|---|---|---|---|
| Bifold doors | 70 mm frame system | 1200 x 3000 mm | 130 kg, traffic leaf on four hinges | 1.45 (Ug 1.0) · 1.2 (Ug 0.7) | PAS 24 routes where specified |
| Sliding doors | 35 mm interlock sightline | 2500 x 3000 mm | 300 kg, lift-and-slide | At quote | PAS 24 routes where specified |
| Casement windows | 58 mm frame system | 1370 x 2400 mm | 180 kg, heavy-duty hinges | 1.4 (Ug 1.0) · 1.2 (Ug 0.7) | PAS 24 routes where specified |
| Tilt and turn windows | 58 mm frame system | 1725 x 2300 mm | 130 kg, heavy-duty kit | 1.4 (Ug 1.0) · 1.2 (Ug 0.7) | PAS 24 routes where specified |
| Entrance doors | 58 mm frame system | 1200 x 2400 mm | 90 kg | 1.3 (Ug 1.0) · 1.1 (Ug 0.6) | PAS 24 routes where specified |
| Heritage doors | 70 mm frame system | 900 x 2500 mm | 120 kg | At quote | Multi-point locking with barrel hinges. PAS 24 not stated for our build yet: the system supplier's August 2026 data sheet lists it as PAS 24, which depends on the tested hardware, so the security route is confirmed at quote. |
| Internal doors and screens | At quote | 1000 x 2600 mm | 80 kg | n/a, internal | Internal only; multi-point/shoot-bolt locking and ball-catch options available (no PAS24). |
| Commercial doors and framing | 68 mm frame depth | 1300 x 3000 mm | 250 kg, bottom pivot | At quote | PAS 24 routes where specified |
| Curtain walling | 62 mm frame system | 1500 x 4000 mm | 250 kg | At quote | Confirmed at quote |
| Roof lanterns and flat rooflights | At quote | 1200 x 2400 mm | 120 kg | At quote | Fixed structural-glazed rooflight (not a security-rated opening). |
Envelopes, not quotations. Figures for your opening are confirmed at quote.
Download the range brochure (PDF, 5.6 MB)
Per-product tested performance, including the mock-up size each class was achieved at, is on the product pages.
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
Common questions
What specifiers ask before sending a detail
Whose test evidence am I relying on?
The system manufacturer’s. Curtain walling is fabricated to BS EN 13830 and windows and doors to BS EN 14351-1, and those standards describe the tested performance of the systems we fabricate in, held against a tested configuration. VitrineAlu fabricates to those configurations. Ask for the current route-specific evidence before relying on a figure in a specification.
Are the published U-values the ones I can specify?
Not as they stand. Each published figure is read from the system’s U-value table at the glass it names, and at the test size or configuration it holds for. The figure for your opening depends on its actual size, glazing, configuration and installation, so it is confirmed at quote rather than taken from a web page or a brochure.
What do you need to price a detail?
The drawing or elevation, the exposure category, the thermal target and the programme dates. We look at the drawing first and tell you the day your price will be ready, including any detail that needs a special or a structural check.
Do you install, or work with our contractor?
We supply only. We fabricate in Haydock and do not install, so we are never bidding against the glazing subcontractor on your project. Installation and final sign-off stay with the responsible project parties.
Can you support UKCA marking and a Declaration of Performance?
On the specified route, yes. Which documentation applies depends on the product route and the project, so tell us the requirement at enquiry and it is confirmed against the selected system rather than assumed.
Can you provide parametric BIM (IFC4) fenestration models?
Yes. Project-specific certified IFC4 models (ISO 10303-21 STEP physical format) with embedded Pset_WindowCommon and Pset_DoorCommon property sets, including calculated Document L Uw thermal transmittance, acoustic Rw ratings, and PAS 24 security, are generated for architect import into Revit, Archicad, and Vectorworks.
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