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9.25.2.4.(4)
ApplicationIntent
OS2OH1+OS2OH1OP2OP3OS3OH4OS2OH1
ObjectiveOH1 Indoor Conditions
Attribution
(a) [F21,F51-OH1.1,OH1.2]
Application
Application 1: 
Installation of blown-in insulation in wood-frame walls separating heated space from unheated space or the exterior, in new 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 insulation will settle, which could lead to incomplete coverage by the insulation, which could lead to excessive heat loss through portions of the building envelope.
This is to limit the probability of:
  • excessively low temperatures of interior surfaces or within assemblies, or
  • condensation.
This is to limit the probability of:
  • 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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