Register

Master Craftsman Shingle Applicators Manual Practice Test

Access More Questions
In CertainTeed jargon, head lap refers to the entire upper portion of a shingle covered by the succeeding course after installation — about how many inches for 12" x 36" strip shingles?
Correct Answer:
About 7 inches.
Explanation:
Head lap is the portion of a shingle that gets covered by the shingle above it after installation. For 12" x 36" strip shingles, CertainTeed specifies about seven inches of head lap. This amount provides enough overlap to seal the seam against wind and rain, helps hide the underlying fasteners, and keeps the courses staggered for a uniform, weather-resistant installation. If the overlap were smaller, leaks and wind uplift could be more likely; if it were larger, you’d waste material and affect appearance. So seven inches is the recommended balance for this shingle size.

Access more questions from this quiz

Continue to Master Craftsman Shingle Applicators Manual Practice Test for more practice questions and the full quiz experience.

Access More Questions