Subflooring vs Joists vs Underlayment: What's the Difference?
Learn the key differences Layered flooring systems are flexible, sturdy, inexpensive, and easy to build. The floor covering and underlayment rest on a thick, solid subfloor supported by sturdy joists. Floor covering is not structural, so it will always have a subfloor under it. The Spruce / Margot Cavin Underlayment Underlayment is the optional thin buffer between the floor covering and the subflooring. The subfloor is nailed to the top of the joists....