Aluminium Windows and Timber Windows All Window Replacements range of windows and doors is second to none. We can tailor anything to your requirements with your choice of Aluminium Windows, Timber Windows, Semi Commercial Windows, High Performance Glazing and Double Glazing. Door Installation. Nothing makes more of a statement than opening an existing window cavity with a commanding bi-fold, stacker or sliding door. Whether you are looking for the ultra-modern aluminium look.