What is the head size of the nails used for square butt strip shingles?

What is the head size of the nails used for square butt strip shingles?

• A. 1/4 inch
• B. 3/8 inch
• C. 7/16 inch
• D. 1/2 inch

Answer: (C)

Understanding nail head size is about how much bearing surface the nail has to resist wind uplift and keep the shingle in place. For square butt strip shingles, a head size of seven-sixteenths of an inch provides enough bearing area to hold the shingle securely without overdriving or splitting it. Heads that are too small, like a quarter or three-eighths inch, can pull through or tear the shingle under load. A head that’s too large, such as half an inch, can prevent the nail from seating properly and may cause fit issues or splitting. So, seven-sixteenths of an inch is the standard, giving a good balance of holding power and proper installation.

Understanding nail head size is about how much bearing surface the nail has to resist wind uplift and keep the shingle in place. For square butt strip shingles, a head size of seven-sixteenths of an inch provides enough bearing area to hold the shingle securely without overdriving or splitting it. Heads that are too small, like a quarter or three-eighths inch, can pull through or tear the shingle under load. A head that’s too large, such as half an inch, can prevent the nail from seating properly and may cause fit issues or splitting. So, seven-sixteenths of an inch is the standard, giving a good balance of holding power and proper installation.