How do I repair uneven boarding on my living room floor?

My that's kinda scary!

Thank you so much for the heads up Amy!

Also Hope, I'm not quite understanding about Luan.

Thank you for the compliment oh my sunroom.

Being an older farmhouse, helps explain a bit more. Luan is a very thin, but very durable plywood type sub floor. It is used for many different applications (ship lap on the cheap), but mainly to be used as a subfloor that is in need of a flater surface. (Vinyl)

When I mentioned pulling up the original subfloor, you will hopefully find that dirt, possible chunks of wood, causing the height difference. Ex:we had a height difference just at the landing of our 3rd floor master. I pulled back the carpet and padding, and discovered that a sleeve of nails that had gotten dropped and was hung up on top on the floor joist causing the subfloor to flex. Meaning the nails were not long enough to go through the subfloor and to attach to the floor joist.

I would recommend just checking that out. Pull up those patch pieces first. (Far left) It could be a broken floor joist as well, but think positive. You don’t want to go to the trouble or expense of putting a new floor down just to have to pull it all back out cause there was an underlying issue that didn’t get addressed.

a useful tool here on Hometalk is that “helpful” button. If you don’t hit that, and then hit reply, we won’t get a message that you responded to that person. Where you typed your actual reply, is in the place where everyone wishing to help you goes. I hope that makes sense.