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OBC 2006 › Division B

5.4.

Version 0 — in force 31 December 2006

In force
Verified · covered Verified against the 2006-12-31–2007-04-01 consolidation, whose range covers the query date. How to read this

Provenance

OBC 1997 · continues from 5.4. — Pro

Base · O. Reg. 350/06 · ext← current

Original — base regulation

OBC 2012 · continues as 5.4. — Pro

5.4. — Air Leakage

Content not available for this version.

5.4.1. — Air Barrier Systems

Content not available for this version.

5.4.1.1. — Required Resistance to Air Leakage

(1) Where a building component or assembly separates interior conditioned space from exterior space, interior space from the ground, or environmentally dissimilar interior spaces, the properties and position of the materials and components in those components or assemblies shall be such that they control air leakage or permit venting to the exterior so as to,

(a) provide acceptable conditions for the building occupants,

(b) maintain appropriate conditions for the intended use of the building,

(c) minimize the accumulation of condensation in and penetration of precipitation into the building component or assembly,

(d) control heat transfer to roofs where ice damming can occur, and

(e) not compromise the operation of building services.

(2) Except as provided in Sentence (3), an air barrier system shall be installed to provide the principal resistance to air leakage.

(3) An air barrier system is not required where it can be shown that uncontrolled air leakage will not adversely affect any of,

(a) the health or safety of building users,

(b) the intended use of the building, or

(c) the operation of building services.

Text · e-Laws consolidated snapshot

5.4.1.2. — Air Barrier System Properties

(1) Except as provided in Sentence (2), materials intended to provide the principal resistance to air leakage shall have an air leakage characteristic not greater than 0.02 L/( s·m²) measured at an air pressure difference of 75 Pa. 

(2) The air leakage limit specified in Sentence (1) is permitted to be increased where it can be shown that the higher rate of leakage will not adversely affect any of,

(a) the health or safety of building users,

(b) the intended use of the building, or

(c) the operation of building services.

(3) The air barrier system shall be continuous,

(a) across construction, control and expansion joints,

(b) across junctions between different building assemblies, and

(c) around penetrations through the building assembly.

(4) The structural design of air barrier systems installed in assemblies subject to air pressure loads shall comply with Article 5.1.4.1. and Subsection 5.2.2.

Editor's note

In Sentence 5.4.1.2.(1), the air-leakage unit expression is filed in O. Reg. 350/06 with a space after the opening parenthesis ('0.02 L/( s·m²)'); this map reproduces the source as filed. The e-Laws consolidation removes that space ('0.02 L/(s·m²)'). This punctuation difference was not enacted by an amending regulation.