9.26.8.4.(2)

Intent 1:

To limit the probability of:

• shingles not forming a continuous waterproof membrane, or
• damage to shingle tabs under wind-uplift pressure.

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.