Roof Sheathing Thickness Requirements

Nails from sheathing to ridge board roof sheathing ridge board ridge board joist or truss joist or truss roof sheathing vent holes on each side of ridge board.

Roof sheathing thickness requirements.

Spacer type panel edge clips are available from some manufacturers. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Never attach roof sheathing with staples. When you replace a roof on a home that was built before the implementation of the statewide florida building code on march 1 2002 the nailing of the roof sheathing decking must be brought up to current standards for hurricane resistance as part of the installation of the new roof.

Secure roof sheathing panels to the roof framing with 8d common nails spaced six inches on center at the edges and twelve inches on center at intermediate supports. This article discusses the requirements specifications for roof sheathing nailers or plywood or osb and underlayment roofing felt for wood shingle wood shake roofs including roof decking needed under wood shingles shakes. Note holes should not remove more than half of the sheathing section note. Roof sheathing conforming to the provisions of table 2304 7 1 2304 7 2 2304 7 3 or 2304 7 5 shall be deemed to meet the requirements of this section.

Minimum roof sheathing thickness excerpt roof sheathing thickness rafter truss spacing 24 in. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Use a 10d box 0 128 inch by 3 inch nail as a spacer to gauge 1 8 inch edge and end spacing between panels. Wood structural panel roof sheathing shall be bonded by exterior glue.

8d ring shank nails should be used instead. Roof sheathing panel spacing hints. 140 wind speed mph 150 mph 160 mph minimum sheathing thickness inches exposure b 7 16 24 16 15 32 32 16 19 32 40 20 minimum sheathing thickness inches panel span rating exposure c 19 32from asce 7 40 20 19 32 40 20 19 32 40 20. The typical thickness range for sheathing is 3 8 to 3 4 inch.

Sheathing should be a minimum of 19 32 inch thick. If roof sheathing is cut and removed to achieve an air slot continuity and diaphragm action are affected.