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Minimum r value for attics ontario.
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.
The change that occurred in the attic insulation in the ontario building code was in the minimum required r value.
R value measures how well certain building insulation materials can resist heat.
When determining how much insulation you need don t guesstimate calculate.
With my place i reinsulated the whole house this summer.
Where you live different climates require different insulation r values.
When insulation levels increase for attics in new homes most homeowners want to upgrade their attic to new code requirements with their existing setup.
Recommended home insulation r values.
Minimum rsi value of assembly 2 zone 1 less than 5000 degree days zone 2.
You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
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.
Insulation level are specified by r value.
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.
Your home s age if your home is more than 10 year old you likely need more insulation.
The higher the r value the better the thermal performance of the insulation.
R value roofs without attic space insulation above deck u 0 032 r 30 0 ci u 0 028 r 35 0 ci.
Know exactly how much you need with our project calculators.
Another area where the ontario building code has seen changes is in attic insulation requirements.
The recommended r value has been raised from r 50 to r 60 in order to increase the insulation of the attics.
The higher the r value the greater the insulation performance.
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.
All insulation materials in ontario must meet requirements set out by the national government.
