Intent 1:
To limit the probability that extruded mortar will
bridge the gap between the veneer and the sheathing membrane, which
could lead to the accumulation of water on the sheathing membrane.
Where masonry units support or are part of an environmental
separator, this is to limit the probability of excessive moisture
transfer through masonry units, which could lead to:
- precipitation ingress, or
- compromised thermal performance of components intended
to resist heat transfer.
This is to limit the probability of:
- an inadequate control of temperatures of interior spaces,
drafts, relative humidity or water accumulation,
- the generation of pollutants from biological growth
or from materials that become unstable on wetting, or
- deterioration, which could lead to further compromised
integrity of environmental separators.
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.