Minimum Roof Insulation R Value Ontario

The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting.

Minimum roof insulation r value ontario.

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. R values of common types of insulation. Insulation r value is proportional to the insulating material being used. The recommended r value for attic insulation in ontario is between r 50 and r 60.

The higher the r value the greater the insulation performance. You may or may not be aware that insulation codes have changed for all new builds with permits issued after 2016. In simple terms the higher the insulation r value the more thermal resistance. Know exactly how much you need with our project calculators.

The ontario building code act is a legal framework set up by the provincial government to establish minimum building standards and it applies to any new builds renovations or change of use construction. Recommended home insulation r values. When determining how much insulation you need don t guesstimate calculate. The ontario building code requirements for insulation is only one of many sections within the act that helps protect you and other people.

For a very good introductory overview article on r value see r values over at the website of. 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. You should of course see the manufacturer provided technical data sheet for the r value of specific products.

R value measures how well certain building insulation materials can resist heat. The two most important changes in the code for insulation have to do with continuous insulation throughout the building and increasing attic insulation from r 50 to r 60. A bare concrete wall basement foundation rates at an insulation r value of about r 1. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.

The table below shows what levels of insulation are cost effective for different climates and. Continuous insulation this refers to a monolithic. The r value of the insulation for every inch of thickness depends on the type of insulation. See the department of energy s doe ranges for recommended levels of insulation below.

Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. Newly insulated attic rates at an insulation r value of r 40 or more.