The Ontario Building Code | Installation of Loose-Fill Insulation

9.25.2.4. installation of Loose-Fill insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation

(1) Except as provided in Sentences (2) to (6), loose-fill insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation shall be used on horizontal surfaces only.

(2) Where loose-fill insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation is installed in an unconfined sloped space, such as an attic space over a sloped ceiling, the supporting slope shall not be more than,

(a) 4.5 in 12 for mineral fibre or cellulose fibre insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation, and

(b) 2.5 in 12 for other types of insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation.

(3) Loose-fill insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation may be used in wood frame walls of existing buildings.

(4) Where blown-in insulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation is installed in above-ground or below-ground wood frame walls of new buildings,

(a) the density of the installed insulation shall be sufficient to preclude settlement,

(b) the insulation shall be installed behind a membrane that will permit visual inspection prior to installation of the interior finish,

(c) the insulation shall be installed in a manner that will not interfere with the installation of the interior finish, and

(d) no water shall be added to the insulation, unless it can be shown that the added water will not adversely affect other materials in the assembly.

(5) Water repellent loose-fill insulation may be used between the outer and inner wythes of masonry cavity walls.

(6) Where soffit venting is used, measures shall be taken,

(a) to prevent loose-fill insulation from blocking the soffit vents and to maintain an open path for circulation of air from the vents into the attic or roof space, and

(b) to minimize air flow into the loose-fill insulation near the soffit vents to maintain the thermal performance of the material.