Energy Code Requirements. Oct (2sq. ft. blown-in, inches of insulation ). Building with SIPs does not. Oct insulation is more effective than R1.
The number next to the R is just a rating of its insulating power.
R – value requirements. These recommendations are cost-effective levels of insulation based on the best available information on local fuel material costs and weather conditions.
Inspecting your attic insulation will help you determine your insulation needs. Our calculator helps you measure what r value for exterior walls you may be looking for, as well as for different applications. Typical recommendations for exterior walls are R-to R-2 while R-3.
Consult your local building. R-to R-2 in five of six climatic regions. Zones – 7: Add R-to R- insulative wall sheathing beneath the new siding.
Determine the type of insulation you need. Calculate the quantity of. British Columbia – Zone. To find out if you have enough attic insulation, measure the thickness of the insulation.