Exterior Wall Insulation R Value Chart Canada

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.

Exterior wall insulation r value chart canada.

Try the r value calculator available through oak ridge. The higher the r value the better the thermal performance of the insulation. In such cases where r value is assigned this may decrease the r value requirement for batt insulation. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

You will still need to ensure the vapour barrier is sealed and will have to reposition such things as electrical switches and plugs. For example a wall with 3 fiberglass batting r value of 10 8 11 9 may have an overall r value of nearly 14 because of siding sheathing and drywall. At the eaves such that at least 80 of the depth of the installed insulation is achieved above the top plate of the exterior walls. 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.

The r value per inch for different types of insulation varies depending on the. Thickness density and type of materials are some factors that contribute to. R value is a standard unit of measurement for determining among many things how effective your insulation will be. Insulation level are specified by r value.

Read down the column of nominal thermal resistance to find your cavity insulation nominal value provided in rsi and r value. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Natural resources canada 930 carling ave building 1 ottawa on k1y 4x2. Also included is the hugely helpful insulation zip code calculator that spells out the suggested amount of r value necessary for the different portions of a structure like foundation interior and exterior walls attic and more.

R value is a measure of insulation s ability to resist heat traveling through it. Recommended home insulation r values. The table below shows what levels of insulation are cost effective for different climates and. Additional r value for a masonry wall constructed using these materials needs to add the insulating value of additional wall components typically included such as 1 solid foam polyisocyanurate r 8 extruded polystyrene r 5 expanded polystyrene r 4 or 1 of perlite r 2 7 and for an exterior air film winter no wind r 0 17 an interior.

The r refers to absolute thermal resistance.