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9.26.2.2.(1)
OH1OS2
ObjectiveOH1 Indoor Conditions
Attribution
Application
Application 1: 
Nails used to fasten materials and components for roofs, 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: 
To limit the probability that the performance of roofing nails, with respect to material quality, gauge, head diameter, dimensional tolerances, finishes and coatings, will fall significantly below expectations, which could lead to:
  • fracturing under bending forces,
  • inadequate withdrawal resistance,
  • pull-through at nail heads, which could lead to an inability to support roofing components and accessories, or
  • corrosion on contact with water.
This is to limit the probability of inadequate fastening for roofing, which could lead to the displacement of roofing, which could lead to:
  • precipitation or meltwater ingress, or
  • compromised thermal performance of components intended to provide resistance to heat transfer.
This is to limit the probability of:
  • an inadequate control of relative humidity, temperatures of interior spaces or water accumulation,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • deterioration, which could lead to compromised integrity of roofs or assemblies protected by roofs.
This is to limit the probability of:
  • negative effects on the air quality of indoor spaces,
  • the inadequate thermal comfort of persons, and
  • contact with moisture.
This is to limit the probability of harm to persons.
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