Households with windows in their roof or attic conversion are being urged to act before Tuesday, when temperatures are forecast to reach 39°C in London, hotter than many European holiday hotspots, according to the Met Office. The warning specifically targets owners of Velux-style roof windows, which can turn attic rooms into greenhouses under intense summer sun.
Why Roof Windows Are a Heat Risk
Attic conversions and dormer extensions are popular ways to add value to a home, often creating extra bedrooms or home offices. However, roof windows are the worst possible placement for heat gain during summer. The sun blazes directly through the glass, baking the room below. While standard internal blinds can block light, they also darken the space, turning a bright attic into a gloomy dungeon.
Solution: External Anti-Heat Blinds
An alternative is to install external blinds specifically designed for roof windows. According to heatwavetoolkit.com, Velux produces anti-heat awning blinds that block 78% of the sun's direct heat. The mesh fabric maintains daylight and the view, and when not in use, the blind retracts into a discreet top box. Velux describes the product: "An external sun protection for roof windows that is perfect for blocking strong sunlight and heat before they reach the window pane. This effective measure prevents heat from entering the room and protects against bright sunlight."
Cost and Availability
The blinds are available for as little as £50 to £85. Velux adds that the weather-resistant mesh fabric ensures long-lasting durability, and awnings are recommended for any room where comfort and reduced space heating are desired.
Urgency Before Tuesday's Heatwave
With temperatures set to peak on Tuesday, households are urged to install these blinds before the heat arrives. The Met Office has warned of a short but intense heatwave, with London expected to reach 39°C. Taking action now can prevent attic rooms from becoming unbearably hot and protect against heat-related discomfort.
