do i need an subfloor with sheet vinyl on second floor
Top Layer-Finish Floor: The finish floor, such as hardwood, laminate, or tile. Second Layer Down-Underlayment: Plywood, fiberboard, or cementboard, and is usually either 1/4 or 1/2. Third Layer Down-Subfloor: Subfloor will already be in place (unless this home is under construction).ften, the existing finish floor or subfloor are in such bad condition that installing underlayment is necessary. If you are building a new house, the subfloor itself may be adequate for installation of the finish floor--eliminating the need for underlayment.