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9.26.4.4.(3)
ApplicationIntent
OH1OS2OS1OP1OS3
ObjectiveOS1 Fire Safety
Attribution
[F61-OS1.1] Applies where flashing is installed between a shingle roof and a masonry chimney.
Application
Application 1: 
Step flashing for intersections of shingle roofs and chimneys, parallel to the roof slope, on buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
Where flashing is installed between a shingle roof and a chimney, to limit the probability of an inappropriate flashing configuration, which could lead to water spreading horizontally as it descends the roof slope and flowing beyond the area protected by the horizontal leg of flashing, which could lead to precipitation or meltwater ingress into chimneys, which could lead to damage to chimney liners from freeze-thaw stresses, which could lead to the escape of heat or flames, which could lead to the ignition of combustible building components, which could lead to harm to persons [see analysis for Sentence 9.21.4.6.(1)].
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