A solid hardwood must be nailed or stapled to a wooden subfloor on or above grade. Underlayment under a solid hardwood floor is not recommended. An asphalt saturated felt paper should be used under solid hardwood flooring. There may be instances where additional steps need to be taken, depending on the site conditions.
Engineered hardwood can be nailed down, stapled down or glued down. If you have a wooden subfloor it can be nailed or stapled down over an asphalt saturated felt paper. Underlayment is not required. Engineered floors can also be glued down, in which case an adhesive is spread on the subfloor to adhere to the wood flooring. An engineered hardwood floor can also be floated. When utilizing the floating installation method, the use of underlayment is recommended. There are a few different types of underlayment that Flowers Flooring recommends. Please speak with your estimator or one of our sales representatives to inquire about which underlayment is best for your installation.