Name: The Bi-Folding Door Co
Address: Bridge Hall Lane, Bury, Lancashire, BL9 7NY, UK
Telephone: 0161 272 0099

Get In Touch: 0161 272 0099

Energy-efficient and fully weatherproof aluminium casement windows

Fitted with an extended polyamide thermal break, Alitherm windows are an excellent choice for projects requiring an excellent thermal performance. They can achieve U-values of 1.4 W/m²k, far exceeding the minimum requirements of Approved Document L.

With their BS6375-1:2009 accreditation, you’re guaranteed a weathertight installation everytime too, ensuring any properties they’re fitted to remain draught and weather-free.

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Coloured aluminium casements to suit a huge range of projects

We have an extensive selection of bespoke colours and any RAL colour available for the finish, ensuring you can adapt their appearance to meet even the most demanding project requires. You can find a number of popular colour options below, although the full colour range is available via the link here.

Anthracite Grey

Chocolate Brown

White

Black

Agate Grey

Specifications

Performance

Dimensions

Downloads

Specifications

Brand	Alitherm
Material	Aluminium Polyamide
Dual Colour	Yes
Thermally Broken	Yes
NBS Available	Yes

Performance

WER Rating	B
U Value	1.4 W/m2K
Document L Compliant	Yes
Kitemark	Yes
BS 6375-1:2009	Yes

Dimensions

Side Hung Max Width (mm)	700mm
Side Hung Max Height (mm)	1400mm
Top Hung Max Width (mm)	1400mm
Top Hung Max Height (mm)	1400mm
Glazing (mm)	24mm & 28mm
Frame Depth (mm)	59.5mm
Typical Sightlines (mm)	63.5mm

Downloads

Data Sheet Alitherm 500

Ultra-stylish, robust & secure

They boast of a clean, minimalistic look, ensuring for an attractive finish wherever they’re located. And with sightlines of just 63.5mm, they allow huge amounts of natural light to flow inside.

They are also PAS24:2012 accredited, so they do not compromise on security either. As we have security hardware from security specialists Yale at our disposal, we can also enhance security performance to suit the application.

Get in touch today for a free quote

Simply fill out our online quotation form providing your specifications and a member of our team will be in touch with a quote.

Get a trade quote

Free Delivery Nationwide

Our fast and efficient workforce will deliver anywhere in the UK at no extra cost within 10 working days of ordering.

High Quality Guaranteed

Our factory is equipped with the latest machinery ensuring high quality performance & maximum productivity, bringing you a swift turnaround at a competitive price.