How Long Should Roof Nails Be

When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails.

How long should roof nails be.

Nails that are longer than six inches are called pikes and they are seldom used on roofs. In general roofing nails should be long enough to penetrate the wood decking a minimum of 3 4. More than 1 layer of roofing not recommended over 3 8 sheathing. The type of nails you ll need to use during the sheathing process depends on the roof material thickness.

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. Browse other blogs by keywords. The thickness of the nail is directly proportional to its length thus the longer the nail the bigger its size.

For reroofing shingle over shingle or hip and ridge application it is necessary to use minimum 35 mm long roofing nails. 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. Continue reading below our video of the day.