How Long Should Roofing Nails Be

But the nails they will use are 3 why so big.

How long should roofing nails be. If you are using an approved roof sheathing that is less than 3 4 like 7 16 osb or 3 8 plywood then the nail must go all the way through. Nails that are longer than six inches are called pikes and they are seldom used on roofs. Browse other blogs by keywords. For reroofing shingle over shingle or hip and ridge application it is necessary to use minimum 35 mm long roofing nails.

To adjust the pitch a little on the low slope roof. Do the nails really have to be 3 long. Continue reading below our video of the day. They do specify the shank to be 11 12 gauge the head diameter to be st least 3 8 but no specs on how long the shaft needs to be after passes through a 7 16 or 3 8 sheathing.

The length of each nail must be a minimum of 1 inches long and for roof overs atlas recommends a nail length of at least 2 inches. More than 1 layer of roofing not recommended over 3 8 sheathing. The thickness of the nail is directly proportional to its length thus the longer the nail the bigger its size. The more common roof thickness is 3 4 inch decking.

In general roofing nails should be long enough to penetrate the wood decking a minimum of 3 4. Wood shakes minimum 3 4 sheathing wood shakes nail type minimum length 18 straight split 5d box 1 3 4 18 and 24 handsplit and resawn 6d box 2. Nails of the proper length should penetrate three fourths of an inch into the roof deck. There almost done with job.

There going to nail down some 1 inch poly iso roofing insulation. Use 1 nails in re roof applications when the old roof has been removed and to use 1 nails when overlaying the old roof. When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails.