Which starter course overhang is specified for asphalt shingles?

Which starter course overhang is specified for asphalt shingles?

• A. 3/8"
• B. 3/4"
• C. 1"
• D. 1 1/2"

Answer: (B)

At the eave, the starter row should extend beyond the drip edge enough to shed water into the gutters and to properly position the next course. For asphalt shingles, the standard overhang is 3/4 inch. This amount ensures the drip edge is covered and the first row sits correctly, providing the right alignment for the shingles above and preventing water from wicking back toward the roof deck. A smaller overhang won’t cover the drip edge adequately and can lead to water intrusion, while a larger overhang risks wind uplift and poor fit with the drip edge and fascia.

At the eave, the starter row should extend beyond the drip edge enough to shed water into the gutters and to properly position the next course. For asphalt shingles, the standard overhang is 3/4 inch. This amount ensures the drip edge is covered and the first row sits correctly, providing the right alignment for the shingles above and preventing water from wicking back toward the roof deck. A smaller overhang won’t cover the drip edge adequately and can lead to water intrusion, while a larger overhang risks wind uplift and poor fit with the drip edge and fascia.