North carolina state building code.
Minimum roof sheathing for n c residential.
Rafters must be strong enough to hold the roof sheathing and the shingles.
7 1 r oofing 7 12 10 roof sheathing installation key issues n insufficient fastening can lead to total building failure in a windstorm.
Roofs shall be covered withmaterialsassetforthinsectionsr904andr905 classa b or c roofing shall be installed in areas designated by law as requiring their use or when the edge of the roof is less than 3 feet 914 mm from aproperty line classesa bandcroofing requiredtobelistedbythissectionshallbetestedinaccordance with ul 790 or astm e 108.
Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches.
Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick.
Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.
The typical thickness range for sheathing is 3 8 to 3 4 inch.
Sheathing should be a minimum of 19 32 inch thick.
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 fastener spacing.
8d ring shank nails should be used instead.
Wilmington street suite 450 raleigh nc 27601 1058.
Energy conservation code ncecc 301 n.
Never attach roof sheathing with staples.
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.
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.
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.
That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.
If your local building authority has a rafter spacing code you may not space rafters wider than required by code.
N sheathing loss is one of the most common structural failures in hurricanes.
