Aluminium window frames can attract condensation if they have no thermal break, because bare aluminium conducts heat and the inner surface turns cold. Modern frames with a thermal break and warm-edge glazing resist it well, but room humidity and ventilation still decide whether moisture forms.
What is a thermal break in an aluminium window?
A thermal break is an insulating barrier, usually polyamide, that separates the inner and outer sections of the frame so cold does not pass straight through. Modern aluminium window systems almost always include one.
What actually causes condensation on windows?
Condensation forms when warm, humid air meets a cold surface. Cooking, drying washing indoors and poor airflow raise humidity, and the cold surface can be the frame, the glass edge or old, poorly sealed glazing.
How can you reduce condensation?
- Choose thermally broken frames with warm-edge spacer bars in the glazed units
- Use extractor fans in kitchens and bathrooms
- Keep trickle vents open or fit them
- Avoid drying washing indoors without airflow
- Mist between the panes means a failed glazed unit, which needs replacing
Condensation is a ventilation issue as much as a frame issue, so a survey should look at both. Wednesfield Trade Windows is a family-run, Certass registered firm that fits aluminium windows.
Thinking about new windows? We supply and fit windows across Wolverhampton and the surrounding area, and you deal directly with us, the owners. Call 01902 633355, message us on WhatsApp, or request a quote.