Minimum R Value For Attics Ontario

Insulation level are specified by r value.

Minimum r value for attics ontario.

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. The change that occurred in the attic insulation in the ontario building code was in the minimum required r value. Another area where the ontario building code has seen changes is in attic insulation requirements. Recommended home insulation r values.

All insulation materials in ontario must meet requirements set out by the national government. Your home s age if your home is more than 10 year old you likely need more insulation. 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. Where you live different climates require different insulation r values.

Minimum rsi value of assembly 2 zone 1 less than 5000 degree days zone 2. The higher the r value the better the thermal performance of the insulation. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. Know exactly how much you need with our project calculators.

When determining how much insulation you need don t guesstimate calculate. There are many ways to retrofit a home with fiberglass and. 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. The recommended r value has been raised from r 50 to r 60 in order to increase the insulation of the attics.

With my place i reinsulated the whole house this summer. When insulation levels increase for attics in new homes most homeowners want to upgrade their attic to new code requirements with their existing setup. 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. R value is a measure of insulation s ability to resist heat traveling through it.

Reducing electricity consumption in support of ontario s long term energy plan. R value roofs without attic space insulation above deck u 0 032 r 30 0 ci u 0 028 r 35 0 ci. 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.