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Cavity Wall insulation R Values

Reduction of Heat Transfer 

  • a. Up to 85% heat transfer through walls in brick veneer walls
  • b. Up to 63% heat transfer in double brick walls
  • c. Up to 75% heat transfer in weatherboard walls
Increase in R Value 
House Type Prior to Insulation After Cavity Wall Insulation
Double Brick R0.5 R1.5
Brick Veneer R0.4 3.4
Weatherboard R0.5 R2.5