Hardwood Flooring Underlayment Felt Paper. Felt paper is installed under hardwood flooring to provide an extra layer of moisture protection and also to dampen sound. You will need to install it under your wood floors if a padding is not already attached to the hardwood planks.
Start by trying mineral spirits, apply it to the floor. The most common hardwood flooring underlayment is felt, typically manufactured in rolls. Alibaba.com offers 991 hardwood floors underlayment products.
These materials help minimize squeaking that may however, paper and felt do not absorb sound in any meaningful way, nor do they make the surface any softer to walk on.
One person recommends red rosin paper and the other guy recommends 15 lb roofing felt. Watch as jack explains what's involved in floating installation of engineered hardwood flooring. The most common hardwood flooring underlayment is felt, typically manufactured in rolls. This is not a discussion of underlay required for floating floors but rather only in reference so then the obvious question, considering that we know installers have been using felt paper under hardwood flooring for many years, is why did they do it?