More broadly, ventilation , “often neglected, allows, thanks to controlled airflow in the home, for the regulation of air humidity and true comfort throughout the year ,” assures Little Worker. So make sure your mechanical ventilation system (MVHR) is working! Another simple measure for staying cool if you’re about to move in is “eco-design .” This simply means being careful not to place your bedroom in a room facing due south. Never mind the view of the garden! Don’t skip the either, even if it’s currently more fashionable to show off bare windows: ” Blackout curtains trap heat between the and the glass,” the startup reminds us. Blackout curtains also apply to the exterior: Hello Watt, also specializing in energy-efficient renovations, “systematically” offers its clients the installation of shutters.
Regarding the windows themselves, “opting for double glazing is beneficial for maintaining indoor temperatures, both in summer and winter ,” Little Worker reminds us. Admittedly, this is a more expensive undertaking, perhaps best considered for the summer of 2026. The same goes for wall and roof insulation, which is nevertheless “crucial for keeping your home cool during the summer ,” the startup emphasizes.
Insulate with bio-based materials
This guide suggests investing, “where possible, in bio-based insulation , “ which is the most effective for ensuring significant thermal lag, meaning the time it takes for heat to pass through a material. The longer it takes for heat to pass through the insulation, the cooler the home stays. For example, wood wool provides eight hours of thermal lag, twice that of expanded polystyrene.
