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Filling voids under new subfloor

570 Views 3 Replies 3 Participants Last post by  joecaption
Hi everyone,
I'm covering 120-year-old wood flooring with a new subfloor and wood flooring. The floor's support is solid but the old wood on top has some deep gouges. The flooring is very thick so there are no holes yet so we're just layering on top.

That will create voids of up to 1/2" deep under the new subfloor. What is the best filler I can use to fill those voids?



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I'd be removing and replacing those insect infested boards!
May have to get the new boards from a real saw mill for some rough cut lumber so the thickness will match up.
Ever have the house inspected by an exterminator?
Has it been treated for Powder Post Beetles yet?
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