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Composition shingle roofing system showing sheathing and hot-mopped underlayment
Nailing and ridge ventilation for roof sheathing used as a structural diaphragm in high-wind and seismic hazard areas.
Right - A continuous load path connects the roof and wall framing to the foundation.
Seal the roof deck as follows: Sweep roof decking, tape seams, and cover underlayment or roofing felt as shown.
When installing fasteners in roof sheathing, common mistakes include using the wrong size fasteners, missing the framing members, overdriving nails, and using too many or too few fasteners.
Wrong - Roof deck sheathing nails missed the trusses, potentially weakening the roof in high winds.