[最も欲しかった] r rating insulation 174165-R rating insulation canada
Typical recommendations for exterior walls are R13 to R23, while R30, R38 and R49 are common for ceilings and attic spaces See the Department of Energy's (DOE) ranges for recommended levels of insulation below Where to Buy"R" means resistance to heat flow The higher the Rvalue, the greater the insulating power Compare insulation Rvalues before you buy There are other factors to consider The amount of insulation you need depends mainly on the climate you live inBut let's just say it's typical styrofoam The r values are usually double that of the same thickness of art insulation So r13 at 3" thick would be styrofoam at 11/2" thick 1/2" is 1/3 of that So, what is 1/3 of 13? Maine Insulation And Air Sealing Energy Upgrades Insulation Upgrades Maineaudits Com R rating insulation canada