He did not want to remove fitted furniture, I think he may need to rethink
that a bit. There are some Dutch style houses around here with similar
issues. Built in 1939, and are single brick walls as well, like my terraced
one is, and to be honest I'd need to do a heck of a lot to make insulation
better here too, but at least I don't have roof pretending to be walls!
Brian

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The Sofa of Brian Gaff...

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"Tricky Dicky" wrote in message
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You also need to consider a vapour barrier which has to on the warm side of
the insulation. Our last house had two bay windows one stacked on the other,
from the outside between them they had slate outer skin behind which was
some sarking and just plasterboard nailed on the vertical supports on the
inside. It was bloody cold in the bedroom, I removed the PB added to the
thickness of supporting stud work before filling the spaces with paper lined
rock wool. The paper lining extended sideways of the width of the rock wool
allowing it to be nailed to the studs to stop it sliding down, these days
you would probably use batts. The whole lot was covered with a PVC vapour
barrier before reattaching the PB. As far as I was aware I never had any
damp issues and it was an awful lot warmer.

I suppose you could simply add studs without removing the PB, fill the
spaces with batts or celutex, add a vapour barrier and re-plasterboard.

Richard