Does Hardwood Flooring Require Underlayment

(the nailer requires about 6 inches.

Does Hardwood Flooring Require Underlayment. Please refer to the installation guide for your specific flooriing for more information. I used to think hardwood didn't need underlayment.

Interlocking Hardwood Flooring: How Does It Work?
Interlocking Hardwood Flooring: How Does It Work? from www.flooring.org
So that fancy rumpus room in the basement is probably not appropriate for hardwood flooring. Is aquabar also cable of doing this? You need an underlayment for any flooring material with the (rare) exception of thick plank which can span the joists by itself.

Hardwood floor installers use a modified underlayment on a building's second floor and any floors above that.

(the nailer requires about 6 inches. Hardwood flooring installation for both engineered and regular hardwood flooring. The main function of the underlayment is to absorb any minor imperfections existing in the subfloor as well as to deaden the sound. You need an underlayment for any flooring material with the (rare) exception of thick plank which can span the joists by itself.