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9.26.11.8.(1) | Application | Intent |
| OH1 | OS2 |
| Objective | OS2 Structural Safety |
| Attribution | |
| Application | Application 1: Installation of built-up roofing applied over wood,
plywood, OSB or waferboard roof sheathing, on buildings to
which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application
of Part 9].
Exceptions:
except as stated in Sentence 9.26.11.8.(2), which applies where
joints of plywood, OSB or waferboard are taped and the sheathing is primed
with asphalt.
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| Intent | Intent 1: To limit the probability of the absorption of bitumen by
porous roof sheathing or the draining of bitumen through gaps between sheets
of roof sheathing, which could lead to an insufficient thickness of bitumen
to achieve the required degree of watertightness and adhesion of the roofing
membrane, which could lead to water penetrating directly to roof decking or
sheathing, which could lead to deterioration, which could lead to the structural
failure of roofs or elements protected by roofs, which could lead to harm
to persons. |
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