What is the purpose of installing felt under oak flooring?

The installation of felt under oak flooring primarily serves to prevent moisture damage. Given that hardwood floors, such as oak, are susceptible to moisture from the subfloor or ground, felt acts as a barrier that can help absorb any potential moisture before it reaches the flooring. This is essential in maintaining the integrity of the wood, as excess moisture can lead to warping, buckling, or even mold growth beneath the flooring.

By using felt, homeowners and builders ensure a protective layer that enhances the durability and longevity of the flooring. It creates a critical separation that not only guards against dampness but also contributes to the overall performance of the flooring system. Other functions such as insulation and soundproofing are secondary benefits, but the primary reason for felt installation under oak flooring is indeed to mitigate moisture-related issues.