Sheet Plywood as flooring?

3 Feb 2012
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United Kingdom
Is it possible to use sheet plywood as flooring? I'm thinking of using exterior grade plywood to replace half the flooring in a batghroom, where it has been water damaged. It currently has floorboards, several of these have sunk in due to a long term water leak, so was thinking of removing these 4 or five rows of boards and replace it was exterior plywood. If this is ok to do, what size should i use, 12mm or 18mm?

thanks in advance
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You can use ply, the size will depend on what size your floor boards are surely but I would not go less than 18mm.

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