Roof Shingle Nail Size Guide

Length & Gauge by Deck Thickness

This guide explains how to choose the right roofing nail length and gauge for asphalt shingles. Standard rule: nail must penetrate at least 3/4 inch into the deck, or all the way through 3/4-inch or thinner sheathing. For 7/16" OSB single-layer install, use 1-1/4" galvanized nails; for an overlay, use 1-1/2" or 1-3/4" to reach the deck. Gauge is typically 11 or 12, with 3/8" head minimum. Stainless steel for coastal zones, hot-dipped galvanized everywhere else.