Since hardwood floors are expensive, you should take good care of them for them to last for a long time. Here are tips on how to take good care of your hardwood floor: Prepare the Subfloor Properly Warping is one of the major problems with hardwood floors and it comes about as a result of having too much water seeping from the subfloor into the floor. This usually results to parts of the floor rotting and collapsing. To avoid this you should ensure that the subfloor is properly installed. For ideal results you should only work with a qualified professional.