BRANZ Test May 1994
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Thickness
|
R Value
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135mm
|
3.0
|
125mm
|
2.8
|
100mm
|
2.2
|
80mm
|
1.8
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"R-Value" (an expression of heat transfer resistance) is the standard for measuring insulation performance. At R3.6 to 3.8 per inch cellulose insulation is considerably better than most mineral fibre blowing wools, but R-value is only one factor in the energy efficiency of a home. Studies of actual buildings regularly show that cellulose-insulated buildings may use 20% to 40% less energy than buildings with fibre glass, even if the R-value of the insulation in the walls and ceilings is identical. One reason for this is the capacity of cellulose to stop air infiltration.
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