1920s wood floor has a very soft spot roughly six inches square. Boards feel as though they're about to crack, very spongy. Don't see signs of darkening from water. Any recommendations about what the problem might be or the type of tradesperson to call very much appreciated.

My girlfriend and I recently moved into an old 70's house in old Florida. The wooden floors are completely warped and caving in. I feel that it's dangerous and looks awful. The only problem or solution I can see happening is replacing every single piece of wood. It's the only thing between our...

How do I repair extremely dry hardwood floors that also have paint on them? It is a rental house and I don't want to make it worse. Should I just put some cooking oil on them? I have been using Murphy's oil soap and it's not helping.