There are all sorts of frame materials to choose from – each available in different energy ratings. You choose the frame suits your personal taste and the style of your home. PVCu frames are most common. They’re great because they last long and can be recycled.

And then there are wooden frames. They’re natural and require no maintenance. Wood is often chosen in areas where the original windows had a timber frame. Some people prefer aluminium or steel frames because of their slim look.