Homeowners are being urged to inspect their windows this week for a tiny flaw that could signal a much bigger problem as temperatures begin to drop. With autumn now underway, experts warn that internal condensation between panes of glass may indicate that windows are inefficient and will not keep out the winter chill.
What causes condensation between window panes
Condensation naturally forms on glass during colder months when warm indoor air meets the cool surface, creating water droplets. While this is common on the outside of the glass, experts at National Plastics have highlighted that condensation between the panes is a different matter.
According to the experts, a failed or broken seal is one of the major causes of internal condensation. If a window is not properly sealed, warm air can circulate through double- or triple-glazed units. When this air comes into contact with the cooler windowpane, it turns into moisture and causes condensation.
Why a broken seal matters
A broken seal allows cold air to enter the home, meaning homeowners waste money trying to heat their properties. Condensation can also damage windows, discolour the frame, and make the entire room look dirty.
If left to sit for too long, condensation can lead to issues with damp and mould, making it important to address the problem promptly.
How to fix internal condensation
If internal condensation is spotted, a professional will likely need to assess the damage. A broken seal around the window can be replaced, and windows can be re-gassed to help prevent future condensation.
According to experts at Grabex, the only permanent solution is to replace the glass, not the entire window. They said: "In many cases, this is a fault which is covered by manufacturers’ guarantees, usually up to 10 years. New units are gas-filled and warm-edge sealed to restore full insulation. Installation is quick, clean, and far cheaper than replacing the entire window system."
While some online hacks suggest using a hairdryer or drilling tiny holes in the glass to remove internal condensation, these methods are not effective in the long term. Homeowners are better off having an expert examine the windows properly.
