Intent 1:
To limit the probability of inadequate protection
against water leakage through cutouts between shingle tabs in the
bottom course of shingles, which could lead to:
- water penetrating directly to roof decking or sheathing,
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 walls or of assemblies protected by roofs or walls.
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.
Intent 2:
To exempt constructions from the application of Sentence 9.26.7.2.(1), where the functions of starter strip and eave
protection are combined.