Is Roof Sheathing Required

A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather.

Is roof sheathing required.

If your roofing contractor is doing a reroof which is where the new roof is applied over the existing roof the upgrade of the sheathing is not required. Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component. But it s just a one time reprieve. Do need to rack the house with sheathing on walls or cross bracing.

Solid sheathing required for wood roofs in high wind areas. Never attach roof sheathing with staples. R905 8 2 deck slope wood shakes shall only be used on slopes of three units vertical in 12 units horizontal 25 percent slope or greater. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood.

Sheathing should be a minimum of 19 32 inch thick. 8d ring shank nails should be used instead. They only apply for roof replacement where the previous roof is completely removed down to the sheathing. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Roof sheathing or decking is one of those elements. The rsrs designation indicates the fastener is a ring shank roof sheathing nail. Terrell you can build a roof without sheathing. H clips provide additional stiffness between bearing points for the unsupported edges of wood panel plywood or osb roof sheathing along with the necessary 1 8 gap for expansion as shown below illustrated on a bag of simpson h clips.

Solid sheathing is also recommended in areas subject to windblown snow. Table r803 2 3 1 specifies the maximum fastener. Rafters run from the peak of the roof. The minimum plywood for roofing.

Add purlins on top of this for venting and drainage then add horizontal purlins to mount the metal roof to. In areas where the average daily temperature in january is 25 f 4 c or less solid sheathing is required on that portion of the roof requiring an ice barrier. The typical thickness range for sheathing is 3 8 to 3 4 inch. Zip system roof assembly combines our revolutionary integrated sheathing and flashing tape or liquid flashing to provide a sealed roof for protection against moisture intrusion during construction or if high winds strip the roof covering away.

This is required in areas of high wind or seismic activity and wherever else a solid roof diaphragm is required by code.