Is Roof Sheathing Required

If roof sheathing is cut and removed to achieve an air slot continuity and diaphragm action are affected.

Is roof sheathing required.

Rafters run from the peak of the roof. Note holes should not remove more than half of the sheathing section note. As a result most nailing patterns in high wind areas require 8d nails at a maximum of 6 inch spacing along all framing members. 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.

In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood. Roof sheathing or decking is one of those elements. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. Never attach roof sheathing with staples.

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. 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. Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component.

8d ring shank nails should be used instead. 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. 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. The minimum plywood for roofing.

The typical thickness range for sheathing is 3 8 to 3 4 inch. This is required in areas of high wind or seismic activity and wherever else a solid roof diaphragm is required by code. Testing of panel uplift resistance following hurricane andrew led to significant changes in prescriptive roof sheathing nailing requirements throughout much of the u s. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather.