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9.36.2.10. 1) Materials intended to provide the principle resistance to air leakage shall conform to CAN/ULC-S741, "Air Barrier Materials - Specification."
2) Materials referred to in Sentence (1) shall be
a) compatible with adjoining materials, and
b) free of holes and cracks.
3) Where the air barrier system consists of rigid panel-type material, all joints shall be sealed.
A-9.36.2.10. (5)(b) Sealing the Air Barrier System with Sheathing Tape . One method of sealing air barrier materials at joints and junctions is to apply sheathing tape that has an acceptable air leakage characteristic, is compatible with the air barrier material and resistant to the mechanisms of deterioration to which the air barrier material will be exposed. Where an assembly tested to CAN/ULC-S742, "Air Barrier Assemblies - Specification," includes sheathing tape as a component, the sheathing tape will have been tested for compatibility and resistance to deterioration and will be referenced in the manufacturer's literature as acceptable for use with that air barrier assembly.