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9.10.15.5.(3)
ApplicationIntent
OP3
ObjectiveOP3 Protection of Adjacent Buildings from Fire
Attribution
[F02,F03-OP3.1]
Application
Application 1: 
Vinyl cladding on exposing building faces described in Sentence 9.10.15.5.(2) and on exterior walls located above an exposing building face that enclose an attic or roof space, where:
  • the limiting distance is less than 0.6 m, and
  • the vinyl cladding
    • conforms to Subsection 9.27.13.
    • is installed directly over 12.7 mm gypsum sheathing or over masonry
    • has a flame-spread rating not greater than 25 when tested in accordance with Sentence 3.1.12.1.(2), and
    • does not exceed 2 mm in thickness exclusive of fasteners, joints and local reinforcements.
This applies to buildings to which part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] that contain only dwelling units and have no dwelling unit above another dwelling unit.
Exceptions: 
except as stated in Sentence 9.10.15.3.(1), which applies to the calculation of the limiting distance where there are inadequate firefighting capabilities.
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Intent
Intent 1: 
To supersede the requirements of Sentence 9.10.15.5.(2), which would otherwise require noncombustible cladding, if certain conditions are met.
This is to limit the probability that:
  • an exposing building face will have insufficient fire resistance, which could lead to the spread of fire from the subject building to an adjacent building during the time required for emergency responders to perform their duties, which could lead to damage to the adjacent building, and
  • an exposing building face will be ignited and contribute to, or be involved in, a fire, which could lead to the spread of fire from the subject building to an adjacent building during the time required for emergency responders to perform their duties, which could lead to damage to the adjacent building.
Intent 2: 
To direct Code users to Subsection 9.27.13.
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