UPVC Windows Repairs uPVC (Unplasticized Polyvinyl Chloride) is an easy to maintain construction material that can provide your home with energy efficiency and elegance for many years. These windows will require some care and maintenance. Clean the frames and cladding with a soft clean cloth to remove dirt and dust. https://www.repairmywindowsanddoors.co.uk/lewisham-windowrepair/