Minimum Attic Insulation Ontario

Access 1 everyattic or roof space shall be provided with an access hatch where the attic or roof space a measures not less than i 10 m in area ii 1 000 mm in length or width and iii 600 mm in height over at least the area described in subclauses i and ii or.

Minimum attic insulation ontario.

The recommended r value has been raised from r 50 to r 60 in order to increase the insulation of the attics. Newly insulated attic rates at an insulation r value of r 40 or more. The change that occurred in the attic insulation in the ontario building code was in the minimum required r value. Ontario building code sb 12 insulation requirement increases since 2x6 construction with 2 centers i ve always layed our so that everything is lined up from the foundation to the truss.

Another type of insulation we often see is loose fill. Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live. These are changes made in order to increase the energy efficiency of the home and thus also save energy. 3 the minimum thermal resistance of a slab on ground shall conform to table 12 3 4 2 b.

Minimum thermal resistance for slab on ground insulation forming part of sentence 12 3 4 2 3 type of slab on ground position of insulation length of insulation mm minimum rsi value required 1 unheated horizontal 600 3 17 1200 1 94. Insulation susceptible to water damage must be kept a minimum of 2 above a crawl space floor. And with raised heals on the truss there s plenty of insul. Where insulation is exposed to the weather it must be kept protected by 6mm thick preservative plywood or 12mm cement parging.

Attic insulation requirements another area where the ontario building code has seen changes is in attic insulation requirements. The ontario building code access 9 19 2 1. A bare concrete wall basement foundation rates at an insulation r value of about r 1. Add insulation to attic.

Installation of loose fill insulation. Existing 3 4 inches of insulation. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. The ontario building code says that.

Insulation r value is proportional to the insulating material being used. Recommended insulation levels for retrofitting existing wood framed buildings. Beam and floor joist spans are very adequate by todays standards. Choosing energy efficient upgrades.

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. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.