Just had some new windows fitted. They all have a vent at the top which I've been told is a legal requirement (gas?). Problem is when the wind is blowing against the window it comes through the damn vents (even if closed) making the windows themselves as much use as a chocolate kettle.
Any suggestions for a material I could use to block these up? Probably should be breathable...Cheers.
Any suggestions for a material I could use to block these up? Probably should be breathable...Cheers.
