I am installing 3/16 plywood as underpayment for use under LVP.
after about 2/3 through one floor I realized I had some underpayment with what appears to be worm holes, not just the bored out end, but cut sideways exposing a length of bore holes. There are no active signs and it does not run through at any point. My friends believe they were sliced and diced during assembly of the plywood and would be rendered dead during the pressure sealing. I called two professionals with the same take.
so do I move on with it or R.I.P. it all out to see what I missed?
the other issue during that same point in the project I noted faded dark areas, my mind went to mitigated mold. I have no clue, if any it was faded, is there a concern here too?
my gut tells me know, my mind won’t let it go.
please advise. Darieus
That looks like the cheapest underlayment (Lauan) you can buy. I don’t know as to it’s worth under LVP. I don’t think the marks you see are alive anymore. The couple veneers used are ultra thin lauan mahogany plies and the glue may or may not be water resistant. Hard to keep fasteners from being driven clear through in that thickness.