What type of nails should I use for redwood siding?
Specialty siding nails perform best with redwood or other wood sidings. These nails have smaller sinkerheads with waffling to hold finishes. Siding nails also have thin ringed shanks for extra holding power and blunt tips to reduce splitting. These nails are available in either double, hot-dipped galvanized or stainless steel versions, and they can be ordered to match the color of the siding.
Nails should be long enough to penetrate into combined wood sheathing and framing a minimum of 1-1/2 inches. Siding ¾ inches thick will, therefore, require a 2-1/4 inch (7d) nail. When using non-wood sheathing products, such as foam insulation, longer nails are required.
Extensive studies performed at Virginia Tech University concluded that annularly threaded, stainless steel siding nails with a 3/16-inch diameter checkered, flat, slightly countersunk head, and 1/16-inch blunt diamond point performed most satisfactorily under all conditions commonly encountered.
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