Normal Length For Roofing Nails

Fasteners must be driven flush with the surface of the shingle.

Normal length for roofing nails.

Will the 1 1 4 nails rust since they will be below the plywood. Nails that are longer than six inches are called pikes and they are seldom used on roofs. Most of the nails do not come through the plywood. The roof structure is completely open and can be seen from underneath.

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. The most commonly used roofing nails range from one to two inches in length. It is outside in a yard.

If your decking is less than 3 4 inch then a 1 1 2 inch nail will suffice. The length of the nail is the shank and the shank can also vary. Screw shank nails are twisted and have sharp diamond tips and they are used to securely fasten wood roofs. For dimensional shingles being installed over a layer of existing dimensional shingles you should always use a 1 1 2 inch roofing nail.

Roofs been on quite awhile and the nails held ok. Fasteners should be long enough to penetrate at least 3 4 19mm into wood decks or just through the plywood decks. 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 nails used are 1 2 3 4.

Seems 1 1 4 nails are recommended.