Redoing bathroom floor. After removing tiles and underlayment and linoleum, the floor that's left is decrepit, uneven, wavy, has some old plumbing holes. It is not rotted though, the wood is sturdy. ...
In this answer, user user2264997 suggested. You can staple it down - not as messy and fairly quick. I've used something like this on a remodel. It was 3/8" cork over plywood subfloor, then bamboo ...
Is fan fold insulation an acceptable underlayment for hardwood? It is being used as a leveler from one floor level to another.