Roof Sheathing Ridge Gap

But where the wall sheathing meets the roof sheathing there is a gap of approximately 1 8 of an inch.

Roof sheathing ridge gap.

Multiply it by 18 square inches the net free air per foot of ridge. To calculate an example of exhaust and intake use 25 feet of roof ridge vent. 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. This gives you 450 square inches of total exhaust.

Leave a slight gap as if the sheathing was cut a little short and install the sheathing to a matching edge no gap. So you re talking about you re going to reroof and you have a gap between the wall sheathing and the roof sheathing. The gap size typically between 1 and 3 inches. This is a simple pitched roof line with ridge beam and rafters attached with slope hangers.

Begin applying the sheets from the bottom of the roof the eaves and work your way up to the ridge. Stagger the panels over the roof with 2 supports between panel ends. Vents evenly spaced underneath the roof provide intake. And i was advised that that gap should be protected by a home inspector.

I have seen two thoughts. 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. Maintain ridge nailing by adding additional blocking set back from the ridge or by using vent holes see.

Now wait a minute. Avoid butting osb panels tightly. Ridge vent installation in new construction the roofing contractor leaves a small gap at the peak of the roof when installing the roof sheathing. The last course at the top may need to be rip cut if the roof is not in 4 foot increments.

How should the sheathing meet at the roof peak when there will be no ridge vent.