Hi, have only just seen your answer, as I'd forgotten where I'd posted my query! Thanks for your reply. Not sure what you mean by compression on gaskets. Have tried to get window company to come back and fix the problem, as we have had problem from day one of them fitting, and they have tried to fix it several times and now the brush seal at bottom of doors in the centre where the doors meet is badly split where the lock goes through it, and they have just glued it back together, but its not stopping draught coming in at this point. Thinking we might have to get a surveyor out to check it.
Kajay
December 2010