DIYbanter - View Single Post - U values... I thought brick/cavity/brick wall was 1.73...

Andy Burns[_7_]

wrote:

U values... I thought brick/cavity/brick wall was 1.73?

I get something quite different...
Brick Commons - 102mm --- 0.132
Air Cavity - 50mm ------- 0.180
Brick - 102mm ----------- 0.132
Plaster - 6mm ----------- 0.025

Total R Value = 0.469 where U = 1/R = 2.132

Your figure for plaster seems a long way adrift from the figures used
here, depends if you choose heavy or light

http://www.cba-blocks.org.uk/tech/tech_uvalue.html