NK windows specialise in modern technology PVC-U Windows, Double Glazed Windows and Doors. We have a wide range of window and door varieties including Tilt & Turn and the German engineered Kommerling Eurodur 3 S System. We even have products to match your existing natural wood look.PVCU Windows and doors provide for excellent thermal insulation and noise reduction, and help to eliminate condensation and keep out draughts even in the highest winds. PVC U is a poor heat conductor, perfect for keeping the weather out and the warmth in.uPVC is virtually maintenance free - no painting, just the occassional wipe to keep clean.Please give us a call to find out more about our solid, secure U-PVC products.