Exterior Wall Insulation R Value Ontario

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.

Exterior wall insulation r value ontario.

The r refers to absolute thermal resistance. Today the minimum code requirement is r 24. You can achieve better thermal performance in your attic by adding an additional layer of insulation. 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.

In such cases where r value is assigned this may decrease the r value requirement for batt insulation. Installation of loose fill insulation. You will still need to ensure the vapour barrier is sealed and will have to reposition such things as electrical switches and plugs. The table below shows what levels of insulation are cost effective for different climates and.

There are several options for people to meet this new code. R value is a measure of insulation s ability to resist heat traveling through it. Here are some of the most common ways. The ontario building code installation of thermal insulation.

Insulation susceptible to water damage must be kept a minimum of 2 above a crawl space floor. The higher the r value the better the thermal performance of the insulation. The higher the r value the better the thermal performance of the insulation. Higher r value numbers mean that the insulating material resists the cold or heat from the outside better.

Thickness density and type of materials are some factors that contribute to. 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. Where exterior walls are not supported by footings extending below frost level. Where insulation is exposed to the weather it must be kept protected by 6mm thick preservative plywood or 12mm cement parging.

Recommended home insulation r values. An air barrier can be many things such as exterior sheathing or a vapour barrier. See the department of energy s doe ranges for recommended levels of insulation below. Title toronto home insulation insulation shall be installed so that there is a reasonably uniform insulating value over the entire face of the insulated area.

Achieving greater r values in exterior walls.