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.
Specification-led product selection and drawing-led answers for windows, doors, curtain walling and internal glazed screens. Send the detail you have drawn and we confirm a product route that holds it, with the documentation to back it.
Before fabrication, we review the selected route against the drawing and identify the current product evidence and documentation that the project requires. Figures on this site are system envelopes; your opening gets its own evidence.
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.
Evidence before relianceRequest current route-specific documents before relying on any performance or marking claim.
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 | Sightline | Max leaf or panel (w x h) | Max weight | U-value from, W/m²K | Security route |
|---|---|---|---|---|---|
| Bifold doors | 70 mm | 1200 x 3000 mm | 130 kg | 1.2 | Tested to PAS 24 |
| Sliding doors | 35 mm | 2500 x 3000 mm | 300 kg | 1.0 | Tested to PAS 24 |
| Casement windows | 58 mm | 1370 x 2400 mm | 180 kg | 1.2 | Tested to PAS 24 |
| Tilt and turn windows | 58 mm | 1725 x 2300 mm | 130 kg | 1.2 | Tested to PAS 24 |
| Entrance doors | 58 mm | 1200 x 2400 mm | 90 kg | 1.4 | Tested to PAS 24 |
| Heritage doors | 70 mm | 900 x 2500 mm | 120 kg | At quote | Multipoint locking; PAS 24 not stated |
| Internal doors and screens | 57 mm | 1000 x 2600 mm | 80 kg | n/a, internal | Internal only, not security rated |
| Commercial doors and framing | 68 mm | 1300 x 3000 mm | 250 kg | 1.7 | Tested to PAS 24 |
| Curtain walling | 62 mm | 1500 x 4000 mm | 250 kg | At quote | Confirmed at quote |
| Roof lanterns and flat rooflights | 90 mm | 1200 x 2400 mm | 120 kg | At quote | Not a security-rated opening |
Envelopes, not quotations. Figures for your opening are confirmed at quote.
See what evidence we send with an estimate
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?
No. A published figure is a system starting point. The whole-unit figure depends on the actual size, glazing, configuration and installation, so it is confirmed for your opening 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. Estimates go out within 24 hours, Monday to Friday. Anything needing a special or a structural check gets a date the same day.
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.
Work with us