I'm a novice at this whole house-ownership thing, so forgive me if this is a dumb question... I just bought a house that has hardwood floors in the recently remodeled kitchen. The floor is spongy (has some give) in some spots between the joists. When I inspected the floor from the basement, I discovered that there is no subfloor. So my questions are: is this something I should worry about, how can I fix it, and is it a problem to not have a subfloor? Also, there is one particular slat of floor that has a crack running down the length - how can I fix this?
Thanks for your help!