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.

Maintain ridge nailing by adding additional blocking set back from the ridge or by using vent holes see. But where the wall sheathing meets the roof sheathing there is a gap of approximately 1 8 of an inch. It s a simple gable roof with vents at either end and a ridge vent. 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. The gap size typically between 1 and 3 inches. Rising along the underside of the angled purlin until it reaches a gap then rising up to the next purlin and so on to exit at the ridge or gable. Ventilation air follows exactly the opposite path.

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. If there were no signs of trouble due to the abnormally small cut out i d just note its presence. 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.

If there were signs of trouble i d tell them to cut it out properly. Leave a slight gap as if the sheathing was cut a little short and install the sheathing to a matching edge no gap. 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 original builders had put a 1 inch strip of plywood to reduce the gap opening.

The house does not have an overhang. Now wait a minute. The ridge vent installed properly will work better than retrofitted roof vents. Like you i usually see about 1 1 2 inches of gap for the ridge vent.

I am a diy so could easily be wrong but the 1in strip at the top near the ridge doesn t seem like good practice to me. The last course at the top may need to be rip cut if the roof is not in 4 foot increments. It takes 36 nine 4 panels 8 gaps of wall before the panel creep has moved a full inch which is probably the absolute limit. I have seen two thoughts.

Jim katen oregon. When using full sheets of sheathing i end up with a 2 2 5 inch gap from center on either side of the ridge beam.