When it comes to thermal and sound insulation uPVC is the ideal material for apertures. We manufacture Rehau Geneo, an avant-garde uPVC system with low U Values and maximum sound insulation. Rehau have a large colour selection from which you can download by clicking on the brochure below. (Rehau Colours). Rehau offer a 10 year guarantee on white profiles and 5 years on coloured profiles, whilst the glass carry a 10 year guarantee on condensation between glass.