Shiplap in lieu of sheetrock – Questions regarding fire safety
I don’t know if this is correct category to place this question in, but here’s the deal:
Building a living unit in a section of a post-frame building. The exterior walls are constructed using the PERSIST method, with Grace Ice & Water shield covering the OSB, 1″ foam on top of that. The stud bays will be insulated with poly-iso cut and cobbled, 3″ thick.
We will probably be using sheetmetal for the ceiling. But my question is about the walls. We would really like to use pine shiplap boards in lieu of sheetrock. I realize that shiplap is leaky, but I’m not terribly concerned with that due to the air sealing efforts on the exterior. My concern is with fire safety/ code considerations. This building is not in any jurisdiction and therefore not subject to inspections or approvals, but I realize those things are in place for a reason. Can someone give me some advice on concerns with this practice, particularly in regard to fire safety considerations?
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