Which term refers to the triple coverage portion of the strip shingle system?

• A. Head lap
• B. Shingle overlap
• C. Nail line
• D. Fascia

Answer: (A)

Head lap is the part of a strip shingle that is covered by the course above. In strip shingle systems, the amount of head lap determines how much of the lower shingle is concealed by the next row, which is what creates the layered, weather-tight effect—often described as achieving the intended multiple-layer coverage in that area. So the term for this specific overlap used to create the triple coverage portion of the system is head lap. The other options don’t name this particular overlap: shingle overlap is a broader, less specific term; nail line refers to where nails go; fascia is the edge board of the roof.