Normal Length For Roofing Nails

For dimensional shingles being installed over a layer of existing dimensional shingles you should always use a 1 1 2 inch roofing nail.

Normal length for roofing nails.

If your decking is less than 3 4 inch then a 1 1 2 inch nail will suffice. Will the 1 1 4 nails rust since they will be below the plywood. Roofs been on quite awhile and the nails held ok. Seems 1 1 4 nails are recommended.

If you need bigger nails including pikes you may need to place a special order at the hardware store. Fasteners should be long enough to penetrate at least 3 4 19mm into wood decks or just through the plywood decks. Standard lengths are between 1 and 2 inches 2 and 5 centimeters but they are also available at lengths of up to 6 inches 15 centimeters. Wood shingles nail type minimum length 18 straight split 3d box 1 1 4 18 and 24 handsplit and resawn 4d box 1 1 2.

Nails that are longer than six inches are called pikes and they are seldom used on roofs. The most commonly used roofing nails range from one to two inches in length. The nails used are 1 2 3 4. Most of the nails do not come through the plywood.

The length of the nail is the shank and the shank can also vary. Fasteners must be driven flush with the surface of the shingle. Use only zinc coated steel or aluminum 10 12 gauge barbed deformed or smooth shank roofing nails with heads 3 8 10mm to 7 16 12mm in diameter. It is outside in a yard.

The roof structure is completely open and can be seen from underneath.