Roof Sheathing Ridge Gap

It is important here that the sheathing at the eave line be exactly perpendicular to the rafters so that the sheets will meet at the centers of the rafters.

Roof sheathing ridge gap.

Multiply it by 18 square inches the net free air per foot of ridge. Avoid butting osb panels tightly. So you re talking about you re going to reroof and you have a gap between the wall sheathing and the roof sheathing. But where the wall sheathing meets the roof sheathing there is a gap of approximately 1 8 of an inch.

This gives you 450 square inches of total exhaust. The gap size typically between 1 and 3 inches. It s a simple gable roof with vents at either end and a ridge vent. The house does not have an overhang.

Leave a slight gap as if the sheathing was cut a little short and install the sheathing to a matching edge no gap. Maintain ridge nailing by adding additional blocking set back from the ridge or by using vent holes see. Vents evenly spaced underneath the roof provide intake. Now wait a minute.

How should the sheathing meet at the roof peak when there will be no ridge vent. This is a simple pitched roof line with ridge beam and rafters attached with slope hangers. Stagger the panels over the roof with 2 supports between panel ends. To calculate an example of exhaust and intake use 25 feet of roof ridge vent.

And i was advised that that gap should be protected by a home inspector. Begin applying the sheets from the bottom of the roof the eaves and work your way up to the ridge. The last course at the top may need to be rip cut if the roof is not in 4 foot increments. Roof trusses must be dry when sheathing a roof with osb to prevent mold growth in the roof and coverage gaps as the trusses dry and shrink.

Ridge vents when the roof sheathing is used as a structural diaphragm as it typically is in high wind and seismic hazard areas the structural integrity of the diaphragm can be compromised by a continuous vent see figure a below left.