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bobhawes 04-28-2013 05:10 PM

unheated cottage floor
I just purchased a 30 year old unfinished cottage which has 2 layers of 3/8 chip board (is this the same as osb?). The cottage has been closed but not perfectly and the floor is squishy/wavey between the joists.
Can I just go over this floor with 3/4 ply or do I need to remove the existing floor and then try to fit 3/4 ply in (it won't be exact since the old flooring runs under the wall sill plates.

oh'mike 04-28-2013 08:21 PM

I suggest removing the old ,failing subfloor---use 3/4" bc (exposure 1) plywood--

Some will recommend Advantec sheeting---I haven't used it--but the water proof coating might be just what you need for a place that is unheated part of the year---

Wake up,Joe---I know you prefer that for floors----

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