A bare concrete wall basement foundation rates at an insulation r value of about r 1 newly insulated attic rates at an insulation r value of r 40 or more.
R value for attic in ontario.
You will need a higher r value of insulation if you live in the north than if you live closer to the us border.
Existing 3 4 inches of insulation.
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.
It means that different products require different densities to deliver the same r value.
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.
The r value of the insulation for every inch of thickness depends on the type of insulation.
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.
Recommended insulation levels for retrofitting existing wood framed buildings.
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.
R29 was r19 basement walls.
Where you live different climates require different insulation r values.
R50 was r40 ceiling without attic.
Add insulation to attic.
The recommended r value for attic insulation in ontario is between r 50 and r 60.
With an r value of 3 6 3 8 per square inch and its lack of toxicity for both you and your pets it is a solid choice.
R31 was r28 walls above grade.
Which follows the same values as the zone 1 90 table ceiling with attic.
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.
Achieving greater r values in exterior walls.
You can achieve better thermal performance in your attic by adding an additional layer of insulation.
The higher the r value the better the thermal performance of the insulation.
Your home s age if your home is more than 10 years old you likely need more insulation.
Each bag will have a coverage of 12 square feet if you want an r value of r 49.
R20 was r12 below grade slab.
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.
R5 in my case doing renovations and additions i m concerned with table 2 1 1 10.
