Roof Sheathing Ridge Gap

Leave a 3 mm 1 8 inch gap between the osb panels to allow for expansion.

Roof sheathing ridge gap.

Leave a slight gap as if the sheathing was cut a little short and install the sheathing to a matching edge no gap. Multiply it by 18 square inches the net free air per foot of ridge. Stagger the panels over the roof with 2 supports between panel ends. How should the sheathing meet at the roof peak when there will be no ridge vent.

The house does not have an overhang. I have seen two thoughts. But where the wall sheathing meets the roof sheathing there is a gap of approximately 1 8 of an inch. This is a simple pitched roof line with ridge beam and rafters attached with slope hangers.

It s a simple gable roof with vents at either end and a ridge vent. So you re talking about you re going to reroof and you have a gap between the wall sheathing and the roof sheathing. Vents evenly spaced underneath the roof provide intake. This gives you 450 square inches of total exhaust.

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. The last course at the top may need to be rip cut if the roof is not in 4 foot increments. Ridge vent installation in new construction the roofing contractor leaves a small gap at the peak of the roof when installing the roof sheathing. Maintain ridge nailing by adding additional blocking set back from the ridge or by using vent holes see.

Avoid butting osb panels tightly. To calculate an example of exhaust and intake use 25 feet of roof ridge vent. The gap size typically between 1 and 3 inches. 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.

Now wait a minute.