Maximum ventilation
Side-hung opening allows the full sash area to ventilate — ideal for kitchens, living spaces and commercial offices.
Superior thermal performance
Thermally broken 70mm profile with 34mm polyamide break and argon-filled glazing — U-values from 1.2 W/m²K (DGU) to 0.7 W/m²K (TGU).
Secure multi-point locking
Espagnolette multi-point locking with high-end ironmongery as standard — meeting current security requirements.
Bespoke to your dimensions
Designed to your exact opening size — any width or height within system limits, any RAL colour, any finish.
In situ
Casement windows in different environments
Product overview
Slim sightlines, maximum light and ventilation
Aluminium casement windows are side-hung on friction stays, opening outward or inward to provide maximum ventilation across the full sash area. The 70mm thermally broken profile system delivers slim sightlines that maximise glazed area and natural light — a key consideration for architects and developers working to Part L building regulations.
The 34mm polyamide thermal break significantly reduces cold bridging and condensation risk. Argon-filled double or triple glazed units achieve U-values as low as 0.7 W/m²K with TGU. Available as single-light, multi-light or combination frames with fixed lights, our casement windows are designed to your exact opening dimensions.
All frames are finished in T5 powder coat in any RAL colour — satin, gloss or matt. Multi-point espagnolette locking with high-end ironmongery is included as standard. CE marked to EN 14351-1. Supplied bespoke with an 8–10 week lead time. We supply to homeowners, builders, architects and developers across London, Essex, Hertfordshire, Kent and Surrey.
Typical applications
Aluminium casement window FAQs
What is the difference between a casement window and a tilt and turn window?
A casement window is side-hung and opens outward or inward on a friction stay. A tilt and turn window opens inward at the top for ventilation (tilt) or swings fully inward like a door (turn). Both are available in our thermally broken aluminium range.
Can aluminium casement windows be made in any size?
Yes — all our casement windows are bespoke to your exact dimensions. Maximum sash width is 1200mm and maximum sash height is 2400mm within the 70mm system. Larger openings can be achieved using multi-light frames with fixed lights.
Are aluminium casement windows energy efficient?
Yes. Our thermally broken aluminium casement windows achieve U-values of 1.2 W/m²K with double glazing and 0.7 W/m²K with triple glazing — well within current Part L building regulation requirements.
How long does it take to supply aluminium casement windows?
Our standard lead time is 8–10 weeks from order confirmation. We provide CAD design drawings for approval before manufacture.
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