How Long Should Roofing Nails Be

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How long should roofing nails be.

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. More than 1 layer of roofing not recommended over 3 8 sheathing. There going to nail down some 1 inch poly iso roofing insulation. Browse other blogs by keywords.

But the nails they will use are 3 why so big. In general roofing nails should be long enough to penetrate the wood decking a minimum of 3 4. When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails. There almost done with job.

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. For reroofing shingle over shingle or hip and ridge application it is necessary to use minimum 35 mm long roofing nails. 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 more common roof thickness is 3 4 inch decking.

Use 1 nails in re roof applications when the old roof has been removed and to use 1 nails when overlaying the old roof. We have to use 30 mm long nails if we are installing thicker shingles like the laminated shingles cambridge xpress or cambridge xtreme 9 5. Roofing nails range from one to six inches in length. 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.

Do the nails really have to be 3 long. Nails of the proper length should penetrate three fourths of an inch into the roof deck. Nails that are longer than six inches are called pikes and they are seldom used on roofs.