Roof Sheathing Ridge Gap

Multiply it by 18 square inches the net free air per foot of ridge.

Roof sheathing ridge gap.

Maintain ridge nailing by adding additional blocking set back from the ridge or by using vent holes see. Leave a 3 mm 1 8 inch gap between the osb panels to allow for expansion. Begin applying the sheets from the bottom of the roof the eaves and work your way up to the ridge. How should the sheathing meet at the roof peak when there will be no ridge vent.

This gives you 450 square inches of total exhaust. The last course at the top may need to be rip cut if the roof is not in 4 foot increments. Now wait a minute. To calculate an example of exhaust and intake use 25 feet of roof ridge vent.

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. Ridge vent installation in new construction the roofing contractor leaves a small gap at the peak of the roof when installing the roof sheathing. Vents evenly spaced underneath the roof provide intake. The house does not have an overhang.

And i was advised that that gap should be protected by a home inspector. So you re talking about you re going to reroof and you have a gap between the wall sheathing and the roof sheathing. This is a simple pitched roof line with ridge beam and rafters attached with slope hangers. I have seen two thoughts.

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. The gap size typically between 1 and 3 inches. Stagger the panels over the roof with 2 supports between panel ends. Leave a slight gap as if the sheathing was cut a little short and install the sheathing to a matching edge no gap.

It s a simple gable roof with vents at either end and a ridge vent.