What is the correct approach to aligning field shingles during installation?

• A. Start at a straight reference line, ensure uniform exposure, and stagger joints in successive courses.
• B. Begin at the ridge and work inward with irregular exposure to fit the roof shape.
• C. Align each new shingle to the edge of the previous shingle regardless of lines.
• D. Start with random reference lines and adjust exposures later.

Answer: (A)

Aligning field shingles starts with a straight reference line along the eave to keep the rows true from bottom to top. Then set a uniform exposure so the amount of shingle showing is the same in every course, giving a clean, even appearance and predictable water shedding. Staggering joints in successive courses means each seam is offset from the one below it, typically by at least half a shingle. This breaks up continuous seams, improving waterproofing and wind resistance. Approaches that start from the ridge, use irregular exposure, or align each new shingle to the edge of the previous one without a consistent reference line tend to produce wavy edges, uneven gaps, and potential leaks. By following a straight reference line, maintaining uniform exposure, and staggering joints, the field shingles install correctly with neat lines and solid protection.