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9.25.2.2.(3)
ApplicationIntent
OH1OS2
ObjectiveOH1 Indoor Conditions
Attribution
[F51,F63-OH1.1,OH1.2]
Application
Application 1: 
Resistance to the action of soil and water of thermal insulation in contact with the ground, in walls, floors and roofs separating heated space from soil, in 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 of inadequate thermal performance, which could lead to accelerated deterioration or compromised thermal resistance of the insulation, which could lead to excessively low temperatures of interior surfaces or within assemblies.
This is to limit the probability of condensation, which could lead to:
  • an inadequate control of the temperature of interior spaces or relative humidity,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • deterioration, which could lead to compromised integrity of assemblies acting as environmental separators.
This is to limit the probability of:
  • negative effects on the air quality of indoor spaces, and
  • the inadequate thermal comfort of persons.
This is to limit the probability of harm to persons.
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