by Perry525 »
Fri Feb 18, 2011 8:14 pm
I think the fitters have probably done a bad job, the noise is coming round the window frames, take a look under the window cill, they probably didn't bother to seat it properly.
Low expansion foam does a good job, it expands and fills all the gaps, just make sure the frame is filled all the way round and not just on the edge.
I have seen windows and doors where, when you give them a thump the whole thing trembles. On examination you usually find they are held in place with a few screws and bits of plastic trim, remove the plastic and there is a gap all round about an inch or so wide.