I've had to replace the subfloor in my living room, but my existing subfloor is 5/8" plywood and I can't find that size locally with tongue and groove.
I can find 5/8" without tongue and groove and I can find 3/4", but it is 4mm too tall.
One option a guy at the lumber yard recommended is to plane down the underside of the 3/4" where it touches the nearest joists so it is level with the existing floor and ramps to it's full height after 5 or so joists.
Is this an option?
What is the recommended method of making up 4 mm of difference between the subscore heights?
I want to put down vinyl planks, and they required a variance of not more than 1/8 inch over 6 ft according to their manual.