UPVC Windows Repairs uPVC, or Unplasticized Polyvinyl Chloride is a low-maintenance building material that will provide your home with years of energy efficiency and style. However, these windows do require care and maintenance at times. Wipe down the cladding and frames with a soft cloth to remove dust and dirt. https://www.repairmywindowsanddoors.co.uk/coulsdon-windowrepair/