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9.26.7.2.(2) | Application | Intent |
| OH1 | OS2 |
| Objective | OS2 Structural Safety |
| Attribution | |
| Application | Application 1: Materials for starter strips for asphalt shingles,
on roofs of 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 9.26.7.2.(3), which applies where
eave protection of not less than Type M mineral-surfaced roll roofing is provided.
Application 2: This also applies to asphalt shingles installed as
cladding, as stated in Sentence 9.27.1.1.(4). Application 3: This also applies to starter strips for asphalt shingles
on roofs having a slope of less than 1 in 3, as stated in Sentence 9.26.8.2.(1).
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| Intent | Intent 1: To limit the probability of cutouts that coincide with those
of the top layer of shingles, which could lead to less than the required 2
thicknesses of shingle over the entire roof, which could lead to insufficient
protection of roof decking or sheathing from moisture absorption, ultraviolet
radiation, and freeze-thaw cycling, which could lead to premature failure,
which could lead to water penetrating directly to roof decking or sheathing,
which could lead to precipitation or meltwater ingress, which could lead to
deterioration, which could lead to the structural failure of roofs or walls
or of assemblies protected by roofs or walls, which could lead to harm to
persons. |
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