Bob introduces Reggie Ray from Georgia-Pacific to discuss the laying of the sub-floor with southern yellow pine tongue-and-groove plywood. He discusses some of the advantages to using plywood over OSB, including fewer squeaks.

Bob talks with Howard Brickman of Brickman Consulting about how to fix squeaky floors. Brickman first he checks the moisture level in the joists to make sure it is in a normal range. Changes in moisture content cause wood to shrink and swell, which contributes to making floors squeak. Brickman reviews some of the cross-bracing that has been put in place to help make the floor stiffer. Having floorboards that run at an angle rather than perpendicular to the joists gives the floor more strength. Brickman explains how to fix a squeak, by first determining where the squeak is located, either between the sub-floor and the top of the joist or between the wood floor and the top of the subfloor. Brickman thinks the problem is between the wood floor and the sub-loor based on the sound of the noise. Screws are driven from the basement into the the sub-floor, pulling the wood floor and sub-floor above down and pressing them close together. A 2x4 is drilled into the top of the joist and the bottom of the subfloor to reduce the squeak by pulling the subfloor down tight to the joist. Brickman then discusses the use of shim shingles and construction adhesive to reduce squeaky floor noise when they are driven home between the joist and the subfloor.

Pre-finished wood floors are a durable and environmentally sound alternative. It comes in a variety of styles and designs and it's a tongued and grooved product. The pieces are first laid out on the sub floor to ensure staggered joints. Then they are powered nailed.