Frequently Asked Questions - uPVC Windows

The biggest drivers are material quality, installation, environment, and care. Specifically:

• Quality of the uPVC (higher-grade profiles resist brittleness and wear)
• Skilled installation (proper sealing prevents drafts and moisture ingress)
• Weather and exposure (intense sun, severe cold, and temperature swings accelerate ageing)
• Pollution/urban conditions (can cause discolouration and surface degradation)
• Ongoing maintenance (cleaning, lubrication, and seal checks for slow deterioration)

Older plastic glazing often turned yellow over time, but today’s uPVC is made to stay looking new. With UV stabilisers and quality titanium dioxide pigments, these frames usually keep their bright colour for over 20 years, especially if you clean them gently and regularly.

The main culprit is UV radiation, which can degrade unprotected polymers over time. Other contributors include accumulated dirt, harsh or abrasive cleaning chemicals (which can scratch and trap grime), and atmospheric pollution—particularly traffic fumes that settle on exterior surfaces.

Modern frames use advanced extrusion, better chemical stability, and built-in UV stabilisers. High-quality titanium dioxide works like suncream by reflecting UV rays to protect the material. Through-colour profiles hide surface scratches, while painted finishes use strong, UV-resistant topcoats to keep their colour.

Begin by cleaning with warm, soapy water and a soft microfibre cloth. Avoid scouring pads, as they can scratch the surface. For tougher stains, try a specialist uPVC solvent cleaner, but use it sparingly. If the frames have faded from sun exposure, a uPVC restoration cream can gently remove the top layer and bring out fresher material beneath. Gently wiping the frames regularly helps prevent sun damage and keeps them looking bright.

Typical problems include sticky operation, broken seals, and faulty locks. Sticky windows often come from debris in the tracks and can be fixed by cleaning and minor adjustments. Broken seals show up as condensation between panes and reduce energy efficiency; they usually require a seal or unit repair. Malfunctioning locks are often due to misalignment or lack of lubrication. Many issues are minor and cost-effective to repair rather than replace.

Double-glazed uPVC windows will noticeably reduce street noise, helping to create a quieter, more peaceful indoor environment.