Garage Insulation R Value Canada

Garages typically aren t built to be airtight and have lots of air gaps to the outdoors.

Garage insulation r value canada.

By using an insulating material you can reduce the transmission of heat or cold. It gives us a thermal break. The recommended r value for basement insulation in north america is r12 but the r value in insulation is lowered substantially when there is air or moisture leaks. 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.

In canada provincial building codes specify minimum r rsi values for new construction. In such cases where r value is assigned this may decrease the r value requirement for batt insulation. This is why we spray foam garages. 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.

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. Recommended home insulation r values. As a fast option to increase the wall rsi value while reducing thermal bridging install at least rsi 0 88 to 1 76 r 5 to 10 rigid board insulation directly to the wall finish and cover it with drywall. It s also important to realize the value of air sealing in conjunction with 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. 2 x 6 wall rsi 3 52 r 20 nominal or 2 x 4 wall rsi 2 11 r12 nominal. Conditions apply for insulation of attached garages.

Where batt loose fill insulation is used provide no less than full cavity insulation. R value is a measure of insulation s ability to resist heat traveling through it. The higher the r value the better the thermal performance of the insulation. Insulation level are specified by r value.

Finally the larger the number the better the thermal insulation of the door. 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. Thus r value is used to show the energy efficiency of a product. The exterior framed walls shall be thermally insulated to a minimum nominal insulation value of rsi 2 11 r12.

You will still need to ensure the vapour barrier is sealed and will have to reposition such things as electrical switches and plugs. For instance r 16. 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.