BCW66 Aluminium Windows with Hidden Sash

Give your home a contemporary feel with our ultra-slim aluminium hidden sash windows


Our ultra-slim BCW66 aluminium window based on profile from Cortizo has a frame depth of just 70mm and features a hidden sash – the opening is impossible to distinguish from the fixed part of the window when viewed from the outside. With a visible surface of only 66mm, the BCW66 allows for maximum glazing and a huge increase in light into the building. 


Frame:  66mm
Sash:  70mm

Profile Thickness

Door:  1.9mm

Maximum dimensions

Width (L):  1300mm
Height (H):  2400mm


Maximum weight

Sash:  160kg


Colour powder coating (RAL, mottled, rough…)
Wood effect powder coating
Optionally bicoloured

Opening possibilities

INWARDS side hung, tilt and turn & tilt

Energy efficiency

Thermal transmission coefficient:  U-value from 1.0 (W/m2K)


Optional concealed hinges
Optional security hardware

Colour Options

All of our aluminium windows are available in an extensive range of standard and non-standard colours

Weather Resistant

Our aluminium windows keep your home warm all year round and are perfect for keeping out all weather conditions

Ultra Slim Frames

Our aluminium windows boast one of the slimmest frames available on the market today letting extra light flood in to your home


All of our aluminium windows come with multi point locking so you know your door is safe from intruders

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Luke Bower fitted windows and doors for us following having an extension added to our house. He came when asked to measure, and fitted the new windows and doors as soon as possible. We have had no problems with any of his services and I would certainly recommend him to anyone in the future.


Joanne Sinclair in Mirfield

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