We just moved into our first house in Sept. 2009. The house was built in 1899 and has old old hardwood floor exposed (both from above - no carpet, and below - no subfloor) on the first floor that is in great condition and one of the reasons we bought the house. I was planning to address the squeaking issue by placing shims, but do not have a subfloor and some of the areas are not near the floor joists.
Is there a solution for this?
I have plenty of room under the floor as we have a basement that allows for you to stand while working on the first level flooring.
Also, I fear that the 2nd floor which has carpet over the hardwood does not have a subfloor either and am at a loss as to stopping those floors from squeaking as well.