Gaps Between Roof Sheathing

Now wait a minute.

Gaps between roof sheathing.

Position the first piece of plywood or oriented strand board sheathing on the bottom edge of the rafter tails at one end of the roof. One on the reasons i recommend using ice water sheild over the entire roof when having shingles replaced. The recommended maximum gap between roof sheathing boards for low quality 3 tab shingles is 1 4 inch. Gaps that were initially present may have closed due to normal moisture related expansion.

It doesn t mean that panel edge clips h clips are required although there are types of clips that will help with properly spacing the panels. The house does not have an overhang. If the flatness of sheathing or flooring panels is acceptable apa would generally recommend that any finish flooring siding or roofing be installed as planned regardless of whether gaps are present. If asphalt shingles are installed over sheathing with gaps exceeding 1 4 inch over time these gaps may telegraph through and become visible.

But where the wall sheathing meets the roof sheathing there is a gap of approximately 1 8 of an inch. Yes a 3 8 inch gap is a pretty good gap to start with. The exterior face of the foam sheathing will be the water control layer and there will be a gap there must be a gap between the cladding and the exterior face of the foam sheathing. However it is considered good practice to leave a 1 8 gap between sheets and that is also recommended by apa but it is not required.

It s a simple gable roof with vents at either end and a ridge vent. And i was advised that that gap should be protected by a home inspector. The sheathing just provides a nailing surface and support for the shingles as the gaps have no effect on water tightness.