I have a 5 year old house that has very squeaky floors. The floors move up and down between winter and summer. I installed a whole house humidifier which I use during the winter to keep moisture in the house. I want to install porcelain tile in the kitchen and bathrooms but need to fix the issue with the floors first. In addition, the house makes loud popping and cracking noises at night. How do I need to resolve the issue with the floors squeaking and moving up and down before I consider installing the tile?