The current insulating value of the roof is R-10 (RSI 1.8). Once the retrofit is performed on 100% of its surface area, the insulating value is R-28 (RSI 5). The grant amount for this retrofit will be: $1
certain cases). Its thermal resistance or R factor (RSI in the metric system) indicates an insulating material’s performance. The higher the R or RSI value, the more resistant it is to heat transfer and [...] protected by a waterproof membrane. The total thermal resistance of a foundation wall ...
