Gapseal Sash Window Insulation is a proven gap filler, designed to eliminate the cold draughts and improve the comfort and energy efficiency of your home.
The total gap length around a sash window can reach up to 4m in length and has an average gap width of about 2mm. This is the equivalent of a hole the size of a down pipe being drilled through your wall.
Stopping cold air from being drawn into a room and preventing heat loss will reduce your energy bill markedly and make your rooms more comfortable.Easy to install with the free applicator
10m Roll of Gapseal, Fitting Instructions, Free Application Tool