R values of common types of insulation.
Ceiling insulation r value ontario.
The table below shows what levels of insulation are cost effective for different climates and.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
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.
Recommended home insulation r values.
The building code in ontario evolves over time to incorporate new standards and practices in the industry.
In this post we will look at two key ontario building code changes for home regarding insulation requirements continuous insulation and attic insulation.
You may or may not be aware that insulation codes have changed for all new builds with permits issued after 2016.
Insulation level are specified by r value.
The r value of the insulation for every inch of thickness depends on the type of insulation.
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.
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.
The recommended r value for attic insulation in ontario is between r 50 and r 60.
When determining how much insulation you need don t guesstimate calculate.
R value is a measure of insulation s ability to resist heat traveling through it.
Continuous insulation this refers to a monolithic.
The higher the r value the greater the insulation performance.
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.
All insulation materials in ontario must meet requirements set out by the national government.
R value measures how well certain building insulation materials can resist heat.
In such cases where r value is assigned this may decrease the r value requirement for batt insulation.
Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
