The IRC does address the number of shingles.
And indirectly, it addresses the types of shingles. That is, if you live in a 90 mph zone (see Code maps), for example, the shingles you install should be approved by the manufacturer for that wind speed.
The IRC does address the number of shingles.
And indirectly, it addresses the types of shingles. That is, if you live in a 90 mph zone (see Code maps), for example, the shingles you install should be approved by the manufacturer for that wind speed.