Intent 1:
To limit the probability of:
- an inadequate resistance to water absorption, freeze-thaw
cycling, UV exposure or other deleterious environmental loads, which
could lead to the premature failure of built-up roof membranes, or
- built-up roofs with inadequate tensile strength, which
could lead to splitting and tearing of the membranes under traffic
loads and movement of the building structure.
This is to limit the probability of
water penetrating directly to roof decking or sheathing, which could
lead to deterioration, which could lead to the structural failure
of roofs or assemblies protected by roofs, which could lead to harm
to persons.