Installation of Thermal Insulation

(1)  Insulation shall be installed so that there is a reasonably uniform insulating value over the entire face of the insulated area.

    (2)  Insulation shall be applied to the full width and length of the space between furring or framing.

    (3)  Except where the insulation provides the principal resistance to air leakage, thermal insulation shall be installed so that at least one face is in full and continuous contact with an element with low air permeance.

    (4)  Insulation on the interior of foundation walls enclosing a crawl space shall be applied so that there is not less than a 50 mm clearance above the crawl space floor if the insulation is of a type that may be damaged by water.


    (5)  Insulation around concrete slabs-on-ground shall be located so that heat from the building is not restricted from reaching the ground beneath the perimeter, where exterior walls are not supported by footings extending below frost level.

    (6)  Where insulation is exposed to the weather and subject to mechanical damage, it shall be protected with not less than,

    (a)   Reserved

    (b)   6 mm preservative-treated plywood, or

    (c)   12 mm cement parging on wire lath applied to the exposed face and edge.

    (7)  Except as permitted in Sentence (8), insulation and vapour barrier shall be protected from mechanical damage by a covering such as gypsum board, plywood, particleboard, OSB, waferboard or hardboard.

    (8)  In unfinished basements, the protection required in Sentence (7) need not be provided for mineral fibre insulation, provided it is covered with polyethylene vapour barrier of at least 0.15 mm in thickness.

    (9)  Insulation in factory-built buildings shall be installed so that it will not become dislodged during transportation.

Article Ontario Regulation 332/12 Building Code,   Information published by for educational purposes only.