Normal Length For Roofing Nails

The nails used are 1 2 3 4.

Normal length for roofing nails.

Will the 1 1 4 nails rust since they will be below the plywood. 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. The one to two inch roofing nails are suitable for most types of roof shingles. The length of the nail is the shank and the shank can also vary.

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. Screw shank nails are twisted and have sharp diamond tips and they are used to securely fasten wood roofs. Most of the nails do not come through the plywood. Roofing nails should be long enough to penetrate the roofing material and go 19 mm into osb solid wood plywood or non veneer wood decking or through thickness of decking whichever is less.

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. Roofs been on quite awhile and the nails held ok. Fasteners must be driven flush with the surface of the shingle. Nails that are longer than six inches are called pikes and they are seldom used on roofs.

If your decking is less than 3 4 inch then a 1 1 2 inch nail will suffice. The roof structure is completely open and can be seen from underneath. 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.