Minimum Roof Sheathing For N C Residential

Never attach roof sheathing with staples.

Minimum roof sheathing for n c residential.

N sheathing loss is one of the most common structural failures in hurricanes. Loads will vary with the. 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. 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.

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. Energy conservation code ncecc 301 n. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

Wilmington street suite 450 raleigh nc 27601 1058. Design calculations the designer is record is responsible for performing all. N fastener spacing. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Sheathing should be a minimum of 19 32 inch thick. Designer of record is responsible to ensure all roofing projects conform to the minimum requirement of the code. Roofs or ceilings need to be insulated to a minimum of r 38 in zone 3 or r 49 in zone 4. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick.

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. 8d ring shank nails should be used instead. 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 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. Roof sheathing installation 1 of 3 home builder s guide to coastal construction technical fact sheet no.