Attic Insulation Requirements

Type and material of your insulation.

Attic insulation requirements.

The rules and code updates occur every few years so that the ontario building code is updated by also integrating new discoveries and technology in the field of construction and insulation. 2 insulation priorities it is most important to. Square footage of your attic. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1. Insulation level are specified by r value. R value is a measure of insulation s ability to resist heat traveling through it. Use unfaced insulation when adding more insulation to an attic that already has some insulation laying the rolls or batts at right angles to the floor joists.

Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. The higher the r value the better the thermal performance of the insulation. Now that you ve air sealed your attic and basement check your attic insulation levels and add more if necessary. Insulate your attic to the recommended level including the attic door or hatch cover.

Inspecting your attic insulation. Contractor or insulation installer s fee. R 38 shall be deemed to satisfy the requirement for r 49 wherever the full height of uncompressed r 38 insulation extends over the wall top plate at the eaves. Provide the recommended level of insulation under floors above unheated spaces around walls in a heated basement or unventilated crawl space and on the edges of slabs on grade.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. However there is an exception. The main factors that impact the cost are. The 2015 irc requires r 49 insulation for ceilings with attic spaces.

While federal and in some cases state guidelines for insulation levels are merely recommendations the local building code is the true authority over insulation requirements. According to the u s. With precision there has been a change in the insulation requirements. According to home advisor insulating your attic can cost between 1700 to 2100.

Department of energy it s recommended that attics have an r 38 to r 49 or about 12 to 15 of fiberglass or cellulose insulation. The attic is the easiest place to add insulation to improve your comfort and the energy efficiency of your home.