Repairing a uPVC window sill is often more cost-effective than a full replacement. Most surface damage, such as scratches, dents, and yellowing, can be fixed with DIY methods and specialized products like uPVC fillers and cleaners . Common uPVC Sill Issues and Fixes The type of repair depends on the severity of the damage:

uPVC (unplasticized polyvinyl chloride) window sills are durable, but they can suffer from scratches, chips, cracks, or discoloration over time. Fortunately, you can often restore them without the cost of a full replacement.