Many people get puzzled why they need to lay a sub floor before the hardwood floors itself. It will just cost them more money and more pain in installing wood flooring, and can it be directly installed over the existing floor material since hardwood floors had been brag so many times of being durable and reliable over the years.
Well actually the answer is very simple; if you do not have wood flooring as an existing material then you will need to lay a sub floor since it has to be nailed down in place. The sub layer will also ensure that the planks are arrange properly and is tightly shut to prevent disarrangement and unwanted gaps over time.
Another question that will probably pop out of your mind is what materials should be used as a sub layer. Well then, here are the most common materials.
CDX grade plywood CDX is a type of high grade plywood, The C …