The more common roof thickness is 3 4 inch decking.
How long should roof nails be.
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.
More than 1 layer of roofing not recommended over 3 8 sheathing.
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.
Use 1 nails in re roof applications when the old roof has been removed and to use 1 nails when overlaying the old roof.
Nails that are longer than six inches are called pikes and they are seldom used on roofs.
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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.
When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails.