Staff Answer
Jan 16, 2026 - 06:13 PM
Congrats on keeping an old home alive! The truth is, most of our floating floors all require a somewhat even subfloor. The best way to see this is by putting a long 8-10' straight edge on your floor, like a piece of wood or a level, and see how much variance there is. If it's more than 1/4", you likely will need to fix the subfloor first. That is not always that hard.
If you have low spots, you can fill them with a leveling compound or add on thin layers of 1/4" plywood.
If you have high spots, you can use a sander to level them out.
My house was built in 1871, and we had to do some major subfloor repair in certain rooms. It was a lot of work, but we are really happy we took the time to do it right.
If you are unsure how much you can tolerate or "get away with", a good test is to lay out your flooring in the area, click a few pieces together, and walk over it a few times. You can usually tell if it is acceptable to you or if it feels wobbly and needs additional work.
Here is a link to all the floating floors we sell:
https://www.greenbuildingsupply.com/c...
