The first thing to know is that the areas of Ontario are the ones where you will need the highest R Value to be able to optimally insulate your attic.Īlways keep in mind, when you go to carry out this type of insulation work, that you must carry out the work according to Ontario Building Code. Now, let’s go deeper into the R-Value in Ontario, which you must take into account if you want to insulate a roof (but also the rest of your home). Zone 7A: R-Value recommendend is R60, with Batt or Blown Insulation.Zone 5 and Zone 6: R-Value recommendend from R50 to R60, with Batt or Blown Insulation.Zone 2: R-Value recommendend from R51 to R60, with Batt or Blown Insulation.Zone 1: R-Value recommendend from R41 to R60, with Batt or Blown Insulation.Zone 1 and Zone 2: R-Value recommended from R60 to R80.Zone 7A and Zone 7B: R-Value recommended from R50 to R60, with Batt or Blown Insulation.R-Value recommended from R31 to R60, with Batt or Blown Insulation.Zone 6 and Zone 7A:R-Value recommended from R50 to R60, with Batt or Blown Insulation.
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Zone 4 and Zone 5: R-Value recommended from R40 to R60, with Batt or Blown Insulation.The R Value is increasing, so the higher it is, the more thermally insulated your home will be. Here is a precise list of the R-Values necessary for the insulation of roofs in Canada, with related types of better insulation. It must be considered, then, that the minimum thermal resistance of the attic, or any other area of the house, is a requirement that must be respected by law (National Bulding Code or the building codes of the different provincies) The province, the city and the area greatly influence the difference in R Value for the insulation of an attic. The recommended R value for insulation of attics in Canada depends on the area, as it is a value that changes a lot from area to area. Recommended R Value for Attic Insulation Canada These values are a rough guide as the true R-Value of the insulation depends on more factors than the indicated R-Value as explored in detail below. As a general guide from the Department of Energy, the R-Values for the most common types of insulation per inch are TYPE OF INSULATION The R-Value of the insulation for every inch of thickness depends on the type of insulation. The two distinct types of attic insulation are loose-fill material (also commonly known as blown in insulation) and batting.
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The recommended R-value for attic insulation in Ontario is between R-50 and R-60.
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Generally speaking, a higher R-value means better insulating properties. This measurement is described as R-Value. The effectiveness of insulation is measured in relation to its thermal resistance which is a way of saying how much conductive heat flow the product stops from going through it.