The Domestic Heating Design Guide lists the following U values for use in heat loss calculations:
Solid stone wall, unplastered
305 mm U = 2.78 457 mm U = 2.23 610 mm U = 1.68for comparison:
Solid brick wall, dense plaster
102 mm U = 2.97 228 mm U = 2.23 343 mm U = 1.64
Quite possibly... I have swapped them for now unless someone can find more authoritative data.
Go and read some basic physics then.
Well, Bruce has quoted the U values upthread, showing that the heat doesn't just keep going, it has trouble getting through. Less trouble with stone than brick, but still some. A foot thick stone wall seems about the same as a single skin brick wall.
Andy
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