If you find that trickle vents on UPVC windows let in too much cold air or noise, there is a simple way to block them. Use aluminium foil tape. This stuff is specifically designed to retain heat, and withstand moisture, et cetera. Before you stick the tape make sure the area is clean.
If you do have condensation problems, you can easily remove the tape.
Негізгі бет How to Block Trickle Vents on UPVC Windows
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