SBC Aluminium Bi-Folding Doors & WIndows
SBC Aluminium Bi-Folding Doors & WIndows

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Aluminium Bifold Doors & Windows


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Heritage Alitherm

Crittall Style Windows & Doors

0800 612 5592





Crittall Style Hertiage Aluminium Windows

Alitherm Heritage Window
Alitherm Heritage provides the ideal solution for heritage applications such as listed building renovations and large scale replica-refurbishment projects where planning constraints are to be considered.
The Alitherm Heritage window is designed to be built as a series of horizontal modules which can be stacked using horizontal couplers to form a multi-part window featuring a specially design drip bar between modules.


Product Specification
Wide range of high quality, thermally-broken window options.
Fixed windows
Single or double sash, side hung open out casements
Top hung open out casements
Tilt & turn windows
Pivot windows*
Polyamide thermal break provides enhanced thermal performance
Designed as a direct replacement for steel windows
Single or dual colour, marine quality polyester powder coat as standard
Technical Performance
WER Rating B
BRE Green Guide (Commercial) A+
U Value 1.5 W/m2K (using sealed unit 1.0 W/m2K)
Air Class 4, 600Pa
Water Class 9A, 600Pa
Wind Class AE, 2400Pa
Document L Compliant
Frame Depth 47mm
Glass 24mm, 28mm, 32mm & 36mm
Test Certification
BS 6375 Part 1 2009 Resistance to Weather
Recommended Design Limits
Side Hung Vent Max o/a Width 700mm
Side Hung Vent Min o/a Width 300mm
Side Hung Vent Max o/a Height 1400mm
Maximum Vent Weight 40kg
Top Hung Vent Max o/a Width 1400mm
Top Hung Vent Max o/a Height 1300mm
Top Hung Vent Min o/a Height 275mm
Maximum Vent Weight 40kg

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