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danaveach1

Repairing a Subfloor

3 years ago

A friend has just bought an unfinished cabin with a concrete block pier and wood beam foundation. The first thing she needed to do was address a sag in the central portion of the cabin by raising and shoring up the foundation piers. It has been further suggested that she should install a 2nd plywood subfloor over the existing subfloor prior to installing the vinyl tile flooring she desires to put in, since the original subfloor, while in decent shape, has some "waves and buckles" due to having sat unfinished for some time. My question is this: should the new plywood installation be installed at right angles to the existing subfloor (which seems the common sense thing to do in order to tighten up and reinforce the present floor) or should it be put in with parallel seaming to the existing floor? The latter seems like it would be merely echoing existing flaws in the present subfloor. By the way, the existing plywood subfloor is installed at right angles to the floor joists. So the question is whether the new overlay should simply repeat this or form a cross grid layer to it.

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