Hardwood floors may need repairs for a variety of reasons - broken boards, pet damage, water damage, walls removed, vents relocated, holes in boards, etc.
With the proper flooring and expertise, repairs can be blended into the floor seamlessly.
Over the years, many hardwood floors develop small splits or cracks in the surface of the wood. These can be spot repaired with some angled nails to secure the two pieces together, along with some wood putty to hide the blemishes. If your floor is suffering from large cracks, however, you might want to think about refinishing the floor. And if the split is particularly bad, you should probably replace the damaged plank altogether.
Cupped floors, also called washboarding, develop gradually across the width of the wood strip where the edges of the hardwood planks raise up and the center of the board sinks down. The cause of cupped floors is a moisture imbalance where there is more water on the bottom side of the wood plank than on the top. The only cure is to balance the humidity levels in your home, and to give the surface time to return back to normal. After the floor has stabilized, you can have a professional sand it flat and re-finish it to perfection.
Warped hardwood floors, also known as sagging, is a serious problem for any homeowner. It is often the result of serious moisture problems, and any evidence of warped hardwood floors needs to be addressed immediately. Warped hardwood floors are rarely the result of faulty hardwood or installation, but are a sympton of larger moisture problems in the home itself that need to be taken care of.
Besides major problems, you may also experience scratching or loose planks with your hardwood flooring. Scratches can be repaired with touch-up kits, or something as simple as a like-colored crayon. If you have serious scratching, however, you may need to hire a contractor to refinish the flooring altogether. And if you have loose planks, your only solution is to tie them down. Ideally they should be nailed to the subfloor to prevent any more movement, though excessively loose boards can be a sign of improper installation in the first place. Bringing in a professional hardwood installer to re-install your flooring properly is probably the only sure way to permanently solve the problem.

