A subcontractor asks for direction after noting that the project condition shows that vertical transition must be watertight. Which flashing sequence best fits the work?
Correct Answer
A) Use base flashing integrated with membrane
base flashing integrated with membrane best matches the stated condition. The other choices are real construction options in the same family, but they fit different field conditions.
Why This Is the Correct Answer
base flashing integrated with membrane best matches the stated condition. The other choices are real construction options in the same family, but they fit different field conditions.
Why the Other Options Are Wrong
Option B: Use counterflashing over completed base flashing
Use counterflashing over completed base flashing may relate to another site control, but it does not remove or guard the low-slope roof flashing exposure being tested.
Option C: Use prefabricated curb flashing assembly
Use prefabricated curb flashing assembly may relate to another site control, but it does not remove or guard the low-slope roof flashing exposure being tested.
Option D: Use termination bar at vertical flashing
Use termination bar at vertical flashing may relate to another site control, but it does not remove or guard the low-slope roof flashing exposure being tested.
Memory Technique
Low-Slope Roof Flashing lock for Foreman Selecting: controlling is the harm, condition is the guard.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Roofing methods; base flashing and penetration coordination; verify the construction method, material selection, equipment choice, or work sequence that fits the field condition.
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