Minimum R Value For Attics Ontario

The change that occurred in the attic insulation in the ontario building code was in the minimum required r value.

Minimum r value for attics ontario.

Recommended home insulation r values. Where you live different climates require different insulation r values. R value is a measure of insulation s ability to resist heat traveling through it. The recommended r value has been raised from r 50 to r 60 in order to increase the insulation of the attics.

Minimum rsi value of assembly 2 zone 1 less than 5000 degree days zone 2. When insulation levels increase for attics in new homes most homeowners want to upgrade their attic to new code requirements with their existing setup. The higher the r value the better the thermal performance of the insulation. When determining how much insulation you need don t guesstimate calculate.

It is an easy pitch for an insulation sales person to make but not all homes should have a simple r 50 or r 60 attic increase using fluffy blown in fiberglass or cellulose which are the most. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. There are many ways to retrofit a home with fiberglass and. To be available on the market manufacturers take care of this step before their products are even available which is why it s important to ensure you re buying new insulation and not dead stock found in someone s garage.

Know exactly how much you need with our project calculators. The higher the r value the greater the insulation performance. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. With my place i reinsulated the whole house this summer.

Existing 2x4 walls got r14 roxul and an 1 foam on the face new walls are r 22 roxul there so much glass that putting a foam layer was a waste and the ceiling about r 60 blown total r 40 on top of the existing r 20 basement walls r 22 roxul. Insulation level are specified by r value. R value roofs without attic space insulation above deck u 0 032 r 30 0 ci u 0 028 r 35 0 ci. All insulation materials in ontario must meet requirements set out by the national government.

Attic insulation value requirements have been raised so that the density for new homes and additions in ontario now has been raised from r 50 to r 60. Another area where the ontario building code has seen changes is in attic insulation requirements. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.