Minimum Roof Insulation R Value Ontario

R values of common types of insulation.

Minimum roof insulation r value ontario.

The higher the r value the better the thermal performance of the insulation. Know exactly how much you need with our project calculators. 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. The recommended r value for attic insulation in ontario is between r 50 and r 60.

The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting. R value measures how well certain building insulation materials can resist heat. Continuous insulation this refers to a monolithic. 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.

The higher the r value the greater the insulation performance. The table below shows what levels of insulation are cost effective for different climates and. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. For a very good introductory overview article on r value see r values over at the website of.

When determining how much insulation you need don t guesstimate calculate. R value of various materials. See the department of energy s doe ranges for recommended levels of insulation below. The ontario building code requirements for insulation is only one of many sections within the act that helps protect you and other people.

You may or may not be aware that insulation codes have changed for all new builds with permits issued after 2016. A bare concrete wall basement foundation rates at an insulation r value of about r 1. Recommended home insulation r values. Insulation level are specified by r value.

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. The r value of the insulation for every inch of thickness depends on the type of insulation. R value is a measure of insulation s ability to resist heat traveling through it. 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.

In simple terms the higher the insulation r value the more thermal resistance. Insulation r value is proportional to the insulating material being used.