Spacing Subfloor OSB Sheets
Is it necessary leave a gap between OSB panels when using them as for a subfloor assembly in a basement?
My subfloor will be composed of Delta-FL then 1″ XPS foam, followed by OSB sheets. The whole thing will be tapconned to the slab. Finished floor will be floating vinyl plank.
In the Delta-FL instructions they don’t say anything about leaving spacing in the panels but the APA (Engineered Wood Association) says that OSB expands and contracts with changes in humidity levels and can buckle if a 1/8″ gap is not left between panels.
We sourced high compressive strength XPS because the room will have heavy exercise equipment in it and I’m concerned about about the ability of the vinyl plank to bridge the gap.
Thanks in advance for any advice.
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