Minimum Roof Sheathing For N C Residential

North carolina state building code.

Minimum roof sheathing for n c residential.

7 1 r oofing 7 12 10 roof sheathing installation key issues n insufficient fastening can lead to total building failure in a windstorm. The typical thickness range for sheathing is 3 8 to 3 4 inch. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. N sheathing loss is one of the most common structural failures in hurricanes.

8d ring shank nails should be used instead. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Walls need to be insulated to a minimum of r 20 if the insulation is between the studs or r 15 r 5 if the insulation is a combination of insulation between the studs and a continuous layer of exterior insulation in zones 3 or 4. Rafters must be strong enough to hold the roof sheathing and the shingles.

Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches. Design calculations the designer is record is responsible for performing all. Roofs or ceilings need to be insulated to a minimum of r 38 in zone 3 or r 49 in zone 4. N fastener spacing.

The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. Wilmington street suite 450 raleigh nc 27601 1058. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. Roof sheathing installation 1 of 3 home builder s guide to coastal construction technical fact sheet no.

Sheathing should be a minimum of 19 32 inch thick. If your local building authority has a rafter spacing code you may not space rafters wider than required by code. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Never attach roof sheathing with staples.

Fasteners for asphalt shingles shall be galvanized steel stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 3 mm shank with a minimum 3 8 inch diameter 9 5 mm head complying with astm f1667 of a length to penetrate through the roofing materials and not less than 3 4 inch 19 1 mm into the roof sheathing. Loads will vary with the.