Preventing Frame Yellowing: Long-Term Care for Exterior Window Installations
Understanding Discolouration in uPVC Windows Discolouration in uPVC windows is a common issue faced by property owners. While modern uPVC windows are widely known for their structural durability and low maintenance, yellowing or staining detracts from a property's curb appeal and signals surface degradation. Assuming that uPVC windows require zero maintenance creates an operational blind spot. Over time, environmental exposure causes surface fading, yellowing, and grime accumulation on uPVC windows , requiring structured prevention and rectification steps. Primary Causes of Frame Discolouration Exposure to UV Radiation Prolonged exposure to ultraviolet radiation from sunlight breaks down the chemical compounds in unplasticized polyvinyl chloride. This degradation causes white uPVC windows to turn yellow, fade, or lose their original finish over time. Environmental Pollution and Airborne Grime Soot, traffic exhaust, dust, and industrial pollutants settle on the exterior surfac...