How Long Should Roof Nails Be

In general roofing nails should be long enough to penetrate the wood decking a minimum of 3 4.

How long should roof nails be.

More than 1 layer of roofing not recommended over 3 8 sheathing. 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. You should use 3 inch ring shank nails to allow at least 1 1 2 inches of truss penetration when working with lumber slats.

The more common roof thickness is 3 4 inch decking. Nails that are longer than six inches are called pikes and they are seldom used on roofs. The type of nails you ll need to use during the sheathing process depends on the roof material thickness. Roofing nails range from one to six inches in length.

For reroofing shingle over shingle or hip and ridge application it is necessary to use minimum 35 mm long roofing nails. 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. The thickness of the nail is directly proportional to its length thus the longer the nail the bigger its size.