Minimum R Value For Attics Ontario

Another area where the ontario building code has seen changes is in attic insulation requirements.

Minimum r value for attics ontario.

R value is a measure of insulation s ability to resist heat traveling through it. 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. 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. R value roofs without attic space insulation above deck u 0 032 r 30 0 ci u 0 028 r 35 0 ci.

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 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 better the thermal performance of the insulation. Minimum rsi value of assembly 2 zone 1 less than 5000 degree days zone 2.

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. Recommended home insulation r values. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. Your home s age if your home is more than 10 year old you likely need more insulation.

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. When insulation levels increase for attics in new homes most homeowners want to upgrade their attic to new code requirements with their existing setup. There are many ways to retrofit a home with fiberglass and. Insulation level are specified by r value.

Where you live different climates require different insulation r values. Reducing electricity consumption in support of ontario s long term energy plan. All insulation materials in ontario must meet requirements set out by the national government. When determining how much insulation you need don t guesstimate calculate.

Know exactly how much you need with our project calculators. R value measures how well certain building insulation materials can resist heat. The higher the r value the greater the insulation performance.