How Long Should Roof Nails Be Single Dimensional Shingle Plywood

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

How long should roof nails be single dimensional shingle plywood.

For dimensional shingles being installed over a layer of existing dimensional shingles you should always use a 1 1 2 inch roofing nail. 4 feet equals 48 inches which you then divide by 8 to determine that you ll need six nails where the board comes in contact with a truss. To determine the nail length you should consider the number of layers of shingles shingle thicknesses underlayment and flashings installed on eaves sidewalls and valleys etc. Also place a nail 2 inches from each end of the shingle in line with the other two.

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. 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. Wood shingles minimum 3 4 sheathing 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. In all use four nails per 3 tab shingle.

If you need bigger nails including pikes you may need to place a special order at the hardware store. The thicker the new shingle the better it will hide any imperfections in the roofing below. Fasteners should be long enough to penetrate at least 3 4 19mm into wood decks or just through the plywood decks. The one to two inch roofing nails are suitable for most types of roof shingles.

Architectural shingles are an even better choice. Nail spacing for sheets of osb and plywood is 8 inches per nail. Their tab slots should not line up with the tab slots of the starter course if there are any. It s a good idea to use at least 40 year shingles.

However make sure that you do not nail into the tar strip. The most commonly used roofing nails range from one to two inches in length. The screw shank nails.