Minimum Roof Insulation R Value Ontario

R values of common types of insulation.

Minimum roof insulation r value ontario.

The table below shows what levels of insulation are cost effective for different climates and. See the department of energy s doe ranges for recommended levels of insulation below. You should of course see the manufacturer provided technical data sheet for the r value of specific products. For a very good introductory overview article on r value see r values over at the website of.

In simple terms the higher the insulation r value the more thermal resistance. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. A bare concrete wall basement foundation rates at an insulation r value of about r 1. Recommended home insulation r values.

The recommended r value for attic insulation in ontario is between r 50 and r 60. The higher the r value the better the thermal performance of the insulation. 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.

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. Insulation level are specified by r value. The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting. Insulation r value is proportional to the insulating material being used.

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. Minimum rsi value of assembly 2 zone 1 less than 5000 degree days zone 2 5000 or more degree days opaque wall assembly 2 63 3 83 wall assembly adjacent to unconditioned space 1 61 2 02 below grade wall 3 2 11 2 82 roof assembly 3 91 5 68 floor assembly over unconditioned space 4 52 4 52 column 1 2 3 notes to table 12 3 4 2 a. Newly insulated attic rates at an insulation r value of r 40 or more.

The ontario building code requirements for insulation is only one of many sections within the act that helps protect you and other people. R value measures how well certain building insulation materials can resist heat. The higher the r value the greater the insulation performance. 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. When determining how much insulation you need don t guesstimate calculate.