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Alu-Clad Passivhaus Window

Designed specifically for the growing UK Passive House market, we’re proud to present these cost-effective Passive House windows engineered from aluminium-clad timber.
Designed specifically for the growing UK Passive House market, we’re proud to present these cost-effective Passive House windows engineered from aluminium-clad timber.

These windows combine all the natural style of timber internally with the practical ease of maintenance of external aluminium cladding. Side-hinged, they offer a choice of inward opening styles, either tilt-only or tilt and turn.

With first-rate performance for air and water tightness, this window system is certified and compliant with the German Passivhaus Institute standards.

To maximise solar gains, these triple-glazed windows can be created in sizes up to 3m high, and we offer a choice of four glass types, hardwood or softwood frames, and RAL colours.

Specifications

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Alu Clad Passivhaus Windows
Product guidance - as standard
Frame
86 x 108 mm – Standard. Manufactured using mortise and tenon joints, glued and mechanically fixed.
Sash
78 x 92 mm - Standard.
Sill projection
50 mm, 70 mm, 90 mm, 110 mm, 130 mm, 150 mm, 225 mm, 300 mm, 360 mm
Wood moisture content
12-19%
Glazing beads
Internally Beaded.
Product specification
Material
Engineered redwood - Standard.
Internal Finish
Three coat spray applied factory finish using water based micro-porous paint/ stain.
External Finish
Polyester Powder coating.
Colour
White - RAL 9016 - Standard. Any RAL - from RAL classic range. Stain - from TRC stain range.
Glazing
Triple glazed 4 Low-E /18/4/18/4 Low-E - Standard.
U-value
0.8 W/m²K.
Perimeter spacer bars
White warm edge perimeter spacer with white warm edge integral spacers - Standard. Silver and Black spacer optional.
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Alu Clad Passivhaus Windows

The evolution of
alu-clad flush casement windows

The first generation of alu-clad flush casement windows were simply manufactured to extend the lifespan of what had previously been purely timber frames. This was achieved by adding a thin plating of aluminium to the exterior profile of the timber. While this helped protect the frames from the elements, it didn’t allow for much improvement in energy efficiency or security.

Today’s generation of alu-clad flush casement windows has significantly evolved. They are now renowned for their high performance and longevity. The result of combining the best features of timber and aluminium frames into a first-class window system has allowed energy performance, low maintenance and weather protection to become standard features. It’s perfectly reasonable to expect a good quality window system to last upwards of 40 years!

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