We use the 58BW/BD window and door system from ALUK which is a cost effective system and very popular with our customers.
The aluminium window system:
The design is very flexible, with clean lines and is available in Top Hung, Side Hung, Tilt before Turn, Fully Reversible and Steel Replacement formats with a range of glazing and hardware options. The windows can be internally or externally glazed and the beading comes in flat, olovo and chamfered to provide traditional or contemporary appearances.
The windows feature a Unique polyamide thermal break design to improve thermal performance.