Hello, I have a couple low spots in my hardwood flooring and am wondering if it's normal or something I should be concerned about? The house was built in 1953 and the floors are original. Before I bought the house the inspectors stated that for the most part the house was structurally sound, they only issue was that one of the masonry supports appeared to be leaning slightly. I've had other people under the house doing electrical work and they even commented on how good everything looked under there considering the age of the house. I'm hoping that these low spots are due to the house settling over the past half century and nothing more expensive.