Garage Insulation R Value Canada

Exterior walls if your exterior walls are constructed from 2 by 4 inch studs the most insulation that can go into the wall while retaining its r value is r 13 or r 15 as these are both made to fit a cavity.

Garage insulation r value canada.

By using an insulating material you can reduce the transmission of heat or cold. In such cases where r value is assigned this may decrease the r value requirement for batt insulation. Finally the larger the number the better the thermal insulation of the door. Garages typically aren t built to be airtight and have lots of air gaps to the outdoors.

For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. Where batt loose fill insulation is used provide no less than full cavity insulation. It s also important to realize the value of air sealing in conjunction with insulation. 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.

Conditions apply for insulation of attached garages. The higher the r value the better the thermal performance of the insulation. The table below shows what levels of insulation are cost effective for different climates and. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

Thus the standard r value varies by climate temperature and specific conditions. This number is calculated as a function of thickness of the insulator and its physical properties. Insulation level are specified by r value. You can insulate the walls ceiling and door of the garage to the highest r value possible but if you fail to fill those air gaps you ll still be wasting a lot of heat.

This is why we spray foam garages. If there s a room above the garage it s going to be cold because there s a lack of insulation or at least improper insulation. Insulate the garage s ceiling by using the recommended r value for your area as advised by the department of energy s oak ridge laboratory. 2 x 6 wall rsi 3 52 r 20 nominal or 2 x 4 wall rsi 2 11 r12 nominal.

The exterior framed walls shall be thermally insulated to a minimum nominal insulation value of rsi 2 11 r12. It gives us a thermal break. Thus r value is used to show the energy efficiency of a product. R value is a measure of insulation s ability to resist heat traveling through it.

You will still need to ensure the vapour barrier is sealed and will have to reposition such things as electrical switches and plugs. Recommended home insulation r values. In canada provincial building codes specify minimum r rsi values for new construction.