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Community and Q&A

Sheathing at the ridge vent

ronwalashek | Posted in General Questions on

I have a 12 pitch roof with 24 OC tji rafters and 5/8 deck membrane I have a 1.5 inch air channel between the rafters that vents along a continuous ridge vent. The sheathing sets back from the ridge 2″. How do I attach the sheathing membrane at the ridge set back (other than the 24 OC rafters) without impeding the air flow? Is there a metal, inverted ‘U’ shaped bracket that I can screw the deck to? Left unattached, compromises my shear value and will eventually sag.

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  1. GBA Editor
    Martin Holladay | | #1

    Ron Walashek,
    Your question is unclear. What do you mean by "5/8 deck membrane"?

  2. GBA Editor
    Martin Holladay | | #2

    If you're simply talking about 5/8-inch plywood or OSB roof sheathing, it's normal to leave a gap at the ridge under the ridge vent. The plywood or OSB is nailed to the rafters. There is no need for blocking between the rafters at this location. (I'm guessing that you are worried that blocking would impede air flow.) Is that your question?

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