Roof Sheathing Spacing

Some older h clips do not provide a built in gap.

Roof sheathing spacing.

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 panel spacing hints. Roof sheathing holds your roof together. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather.

A structure s roof truss spacing can vary from every 12 to 24 inches. The spacing was to permit air to circulate under the shakes and shingles particularly shingles. Boards used for sheathing range from those with a 4 inch face to 48 inch long plywood sheets. Note holes should not remove more than half of the sheathing section note.

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. Sheathing is made of roofing plywood other materials. The number of nails needed for a roof varies on multiple factors such as board face width length and roof truss spacing. Spacer type panel edge clips may also be used for roof sheathing applications.

Use a 10d box nail to gauge 1 8 inch spacing between panels. Edge clip requirements depend on the relationship of the panel span rating to the actual distance between roof framing. However it is not a requirement. Tiles were designed so that lugs or short protrusions on the top.

If roof sheathing is cut and removed to achieve an air slot continuity and diaphragm action are affected. Use a 10d box 0 128 inch by 3 inch nail as a spacer to gauge 1 8 inch edge and end spacing between panels. The thickness of plywood used for roof decking depends on the roof slope the spacing of rafters and the weight of other material to be put over the decking as well as the design load the. Panel spacing is an apa recommendation to provide installers with a means of minimizing the potential for panel buckling.

The problem exists because nail sizes and spacing used to attach the sheathing to the roof s structural members rafters or trusses do not provide enough strength to keep the sheathing on. See all roof sheathing options connect with local roofers.