Core TradesQuestion 104 of 700
Where a sloped shingle roof meets a vertical sidewall, the correct flashing method is:
a.Step flashing woven with each shingle course, extending up the wall behind the siding
b.A single continuous piece of flashing laid over all shingles
c.Sealant only at the joint
d.No flashing if the shingles are close to the wall
Explanation
A roof-to-sidewall junction requires step flashing: individual L-shaped pieces interwoven with each shingle course and extending up behind the wall covering, so water is shingled over each piece. A single continuous strip, sealant alone, or no flashing all lead to leaks.
Law Reference: 2025 CA Building Code, Chapter 15 (Roof Assemblies)Practice all 700 questions free — no signup required.
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