Condensation on windows can lead to mould and dampness in the colder months. Thankfully an expert has shared multiple solutions including ventilation improvements and cost-effective fixes
04:00, 08 Jan 2026
As the colder months approach, condensation inevitably follows - but how can you banish this unwanted visitor from your home? With musty odours, damaged curtains and flaking wallpaper as typical by-products, Brits have been searching for a solution during the colder winter months.
And even those with the top-level glazing on their windows aren't spared. "While double glazing is effective in preventing some condensation, the colder conditions can, unfortunately, bring mould regardless," Allan Reid, Founder of Art Windows and Doors, explains.
Fortunately, he says there's a remedy for every household. With numerous approaches available - from swift jobs to investing in specialist equipment to mould-proof your home - it's vital to identify the most suitable solution for you and your property. The double glazing specialist has below revealed his essential tips with a fundamental rule everyone should implement to minimise condensation...
Ensure adequate ventilation
Reid advises: "Whether you have single, double or triple-glazed windows, proper ventilation is always the best way to reduce condensation. For double and triple-glazed windows, condensation between the layers of glass is indicative of a problem, such as the air-tight seal failing and letting the insulating gas out," reports the Mirror.
Replace the air tight seal
"Replacing the air-tight seal between your layers of glass is essential to prevent water vapour. If the seal fails and the insulating gas is not present, the subsequent water vapour will reduce the lifespan of your windows and potentially lead to draughts and chilly air," he explains. "Luckily, replacing an air-tight seal is often inexpensive, costing between £5 to £10 per window".
Monitor varnish and paintwork
"If the paint surrounding your windows begins to chip, bulge or flake, this signals a condensation issue. Whether moisture becomes trapped beneath the paint or the varnish starts sweating during colder months, this can worsen condensation problems further," continues the specialist. Adding that, "paint can often hide dampness, which is caused by condensation. By ignoring the flaking paint and continuing to replace it, you avoid treating the problem, allowing it to worsen".
Fit an extractor fan
The professional suggests: "You can install an extractor fan directly into a double-glazed window (and even single-glazed windows) for a significant reduction in condensation. This is particularly effective for rooms prone to steaming, such as kitchens and bathrooms, with cooking and showering leading to an increase in water vapour".
Reid also offer Trickle vents. These "can be fitted into all different types of window frames, including double and triple glazing. Highly effective at aiding the circulation of air in your home, they lead to a reduction in mould, condensation and dampness. Unfortunately, some older homes may lack these features, but the units are mandatory when replacing windows as of 2022," he explained.
Additional glazing
The founder shared: "With triple glazing up to 40% more thermally efficient than most uPVC double glazing, the extra layers can also help to reduce draughts, condensation and cold spots. Better insulation can lower your energy bills and keep your home warmer in the colder months, meaning the extra cost is often worth it - especially as bills spiral".
Positive Input Ventilation (PIV) units
Reid states that there are several pros of installing PIV units. These include "improving the quality of air; eliminating humidity and condensation; and reducing pollutants. PIV systems can also help to reduce any dust mite allergens and asthma symptoms"
He concluded that "another great bonus is that they are incredibly cheap to run, costing from £1 to £2 a month after installation. For their low cost, their effective capabilities in eradicating both mould and condensation" have made them incredibly popular.