Core TradesQuestion 103 of 700
At the intersection of two sloping roof planes, water collects and flows in a channel. The flashing installed in this channel is called:
a.Step flashing
b.Counter flashing
c.Valley flashing
d.Drip edge
Explanation
The channel where two roof planes meet is the valley, and valley flashing carries the concentrated runoff. Step flashing is used where a roof meets a vertical wall, counter flashing overlaps base flashing at walls/chimneys, and drip edge goes at eaves and rakes.
Law Reference: 2025 CA Building Code, Chapter 15 (Roof Assemblies)Practice all 700 questions free — no signup required.
Related questions on this topic
- A clothes dryer exhaust duct is run with several sharp bends and a long concealed length, then vented into an attic. Two problems with this install are:
- A high-efficiency (condensing) furnace produces acidic condensate. This condensate must be:
- Supply and return ducts installed in an unconditioned attic are typically required to be insulated and sealed MAINLY to:
- Where a sloped shingle roof meets a vertical sidewall, the correct flashing method is:
- On a low-slope shingle roof, underlayment courses must be lapped so water sheds over each lower course. The MAIN reason for the larger head and side laps on low slopes is:
- Asphalt shingles are blowing off in high winds shortly after installation. The MOST likely installation error is:
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB General Building (B) Trade Examination · How we review