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 |
