Exterior Wall Insulation R Value Ontario

Where insulation is exposed to the weather it must be kept protected by 6mm thick preservative plywood or 12mm cement parging.

Exterior wall insulation r value ontario. Where exterior walls are not supported by footings extending below frost level. The table below shows what levels of insulation are cost effective for different climates and. The higher the r value the better the thermal performance of the insulation. Here are some of the most common ways.

The r refers to absolute thermal resistance. R value is a standard unit of measurement for determining among many things how effective your insulation will be. The ontario building code installation of thermal insulation. Higher r value numbers mean that the insulating material resists the cold or heat from the outside better.

Installation of loose fill insulation. An air barrier can be many things such as exterior sheathing or a vapour barrier. Thickness density and type of materials are some factors that contribute to. See the department of energy s doe ranges for recommended levels of insulation below.

Insulation susceptible to water damage must be kept a minimum of 2 above a crawl space floor. In the province of ontario the building code for exterior walls has changed in the last couple of years several years ago they outside walls had to be r 20 to meet the minimum code requirement. Insulation level are specified by r value. 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.

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 such cases where r value is assigned this may decrease the r value requirement for batt insulation. Recommended home insulation r values. 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.

R value is a measure of insulation s ability to resist heat traveling through it. There are several options for people to meet this new code. 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. Achieving greater r values in exterior walls.

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