Normal Length For Roofing Nails

The most commonly used roofing nails range from one to two inches in length.

Normal length for roofing nails.

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. 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. Fasteners should be long enough to penetrate at least 3 4 19mm into wood decks or just through the plywood decks. Roofs been on quite awhile and the nails held ok.

Will the 1 1 4 nails rust since they will be below the plywood. The roof structure is completely open and can be seen from underneath. Screw shank nails are twisted and have sharp diamond tips and they are used to securely fasten wood roofs. The length of the nail is the shank and the shank can also vary.

The nails used are 1 2 3 4. If your decking is less than 3 4 inch then a 1 1 2 inch nail will suffice. Most of the nails do not come through the plywood. Nails that are longer than six inches are called pikes and they are seldom used on roofs.

If you need bigger nails including pikes you may need to place a special order at the hardware store. 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. For dimensional shingles being installed over a layer of existing dimensional shingles you should always use a 1 1 2 inch roofing nail. It is outside in a yard.

The one to two inch roofing nails are suitable for most types of roof shingles.