Gaps Between Roof Sheathing

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Gaps between roof sheathing.

The recommended maximum gap between roof sheathing boards for low quality 3 tab shingles is 1 4 inch. Actually panels marked sized for spacing simply mean that they are slightly smaller to allow for the recommended 1 8 gap see attached apa tt 055. Align the long edge of the sheathing with the ends of the. One on the reasons i recommend using ice water sheild over the entire roof when having shingles replaced.

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. 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. And i was advised that that gap should be protected by a home inspector.

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. But where the wall sheathing meets the roof sheathing there is a gap of approximately 1 8 of an inch. Gaps that were initially present may have closed due to normal moisture related expansion. 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.

It s a simple gable roof with vents at either end and a ridge vent. If asphalt shingles are installed over sheathing with gaps exceeding 1 4 inch over time these gaps may telegraph through and become visible. Yes a 3 8 inch gap is a pretty good gap to start with.