Our bedroom faces south and the outer skin of the upper storey is made
up of dark stained horizontal wooden cladding apparently fixed to the
inner block skin by battens, probably no more than 1" thick. There is
no vapour barrier we can see and the temperature in the summer is
beyond words! The process must be that the dark wood absorbs solar
radiation and passes the stored heat to the block material, which then
kindly radiates into the bedroom. We are told that to insert a layer of
insulating material would require the entire cladding to be removed,
insulation material to be placed between battens, a vapour barrier to
be fixed over and then the cladding re-applied. I guess the other
alternative would be to apply dry lining board with polystyrene layer
to the inside walls. Anyone had experience like this? Any suggestions?
Any idea how much of a temperature reduction could be achieved by
We are in the south of England and our summers are becoming warmer and
longer so this is a problem we need to address.
You could also just add foam-board insulation over the existing
cladding, and screw new siding or vinyl through the foam to the
wood behind it, but you'd have to re-do the trim around the
windows and doors.
THe most you're likely to get out of adding 1" of insulation
is around R7 or so. Your existing wall is probably around
R3, so the change would reduce your heat-loss/gain through the
walls by at best 70%, ignoring air-leaks and windows.
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