Intent 1:
To limit the probability of:
- slow evaporation of solvents, which could lead to the
formation of blisters, which could lead to compromised watertightness
of membranes,
- softening on exposure to heat from the sun, or
- flow under gravity, which could lead to membrane slippage
and insufficient thickness at high points of roofs.
This is to limit the probability of
compromised continuity or water resistance of membranes, 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 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.