R Value For Attic In Ontario

Foam plastic insulation on the interior of the building envelope must adhere to the requirements of protection of foamed plastics as per 9 10 17 10 of the national building code of canada.

R value for attic in ontario.

The recommended r value for attic insulation in ontario is between r 50 and r 60. Insulation r value is proportional to the insulating material being used. R5 in my case doing renovations and additions i m concerned with table 2 1 1 10. There are many ways to retrofit a home with fiberglass rock wool.

R values of common types of insulation the two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting. The higher the r value the better the thermal performance of the insulation. Which follows the same values as the zone 1 90 table ceiling with attic. 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.

R value roofs without attic space insulation above deck u 0 032 r 30 0 ci u 0 028 r 35 0 ci with attic space and other u 0 021 r 50 0 u 0 017 r 60 0 walls above grade above grade walls u 0 055 r 13 0 r 10 0 ci u 0 055 r 13 0 r 10 0 ci wall below grade below grade wall c 0 092 2 r 10 0 ci c 0 092 2 r 10 0. 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. R50 was r40 ceiling without attic. R31 was r28 walls above grade.

You will need a higher r value of insulation if you live in the north than if you live closer to the us border. R20 was r12 below grade slab. Recommended insulation levels for retrofitting existing wood framed buildings. In such cases where r value is assigned this may decrease the r value requirement for batt insulation.

R29 was r19 basement walls. Where you live different climates require different insulation r values. It means that different products require different densities to deliver the same r value. Achieving greater r values in exterior walls.

Existing 3 4 inches of insulation. You can achieve better thermal performance in your attic by adding an additional layer of insulation. The r value of the insulation for every inch of thickness depends on the type of insulation. Add insulation to attic.

Your home s age if your home is more than 10 years old you likely need more insulation. The pre installation process can therefore be 0 83 per square foot if you opt for cellulose which translates to 830 for attic insulation only.