What size roofing nails do i need

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This article covers the positive and negative features of the following roofing materials.

Comp Shingles	Sheathing thickness
Comp Shingles	3/8"	1/2"	5/8"	3/4"
3-Tab comp shingles (Bare sheathing)	1"	1"	1"	1"
Dimensional comp shingles (Bare sheathing)	1"	1-1/4"	1-1/4"	1-1/4"
3-Tab comp shingles over 3 Tab comp shingles	1-1/4"	1-1/4"	1-1/4"	1-1/2"
Dimensional comp shingles over 3 Tab	1-1/4"	1-1/2"	1-1/2"	1-1/2"

*More than 1 layer of roofing not recommended over 3/8" Sheathing

Wood shake or wood shingles 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"
24" Tapersplit	5d Box	1-3/4"
18" and 24" Tapersawn	6d Box	2"

Wood shake or wood shingles minimum 3/4 " sheathing
Wood Shingles	Nail Type	Minimum Length
18" Straight Split	3d Box	1-1/4"
18" and 24" Handsplit and Resawn	4d Box	1-1/2"

Disclaimer
The above nail sizes are recommendations only. Consult your local building department for specific nailing applications.

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