Intent 1:
To limit the probability of an inadequate substrate,
which could lead to improper application of the waterproofing, which
could lead to discontinuity in the waterproofing, which could lead
to:
- the ingress of moisture from the ground, including water
that is under hydrostatic pressure, or
- compromised thermal performance of components intended
to provide resistance to heat transfer.
This is to limit the probability of:
- an inadequate control of the temperature of interior
spaces, relative humidity, or water ingress and 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 walls or of elements protected by the 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 expand the application of Subsection 9.20.3. to include parging on masonry below ground
that is applied as a substrate for waterproofing.