installing plywood subfloor over uneven concrete

5.1 - Lay flat the pressure-treated 2" x 3"s around the entire perimeter of the room, maintaining a ½" expansion gap between each 2" x 3" and the walls. First, take the plywood and lay it down on the floor. They were going to glue down the hardwood. An additional layer of 3/4” plywood should be installed, with screws, over the existing subfloor. If you are working with wood subfloor, and you find that there are some extremely uneven surfaces, you may want to apply new plywood over the top of the subfloor. Apply an adhesive approved for the installation of plywood, per the plywood manufacturer's recommendat ions. Advantech technology mixes wax/parafin or something to that end in the board to prevent moisture from compromising the wood. The grain of each veneer runs perpendicular to the ply above and below it. Check your local building code, and pay special attention to rules concerning vapor barriers, span ratings (subfloor thickness) and floor drains. Low points can be shimmed, and high points planed down, if necessary. Plywood is the traditional subfloor material. Because of the risk of moisture damaging the flooring, a moisture barrier should always be used. For plywood and OSB (oriented strand board) over joists: First, make sure that the joists are even and not the cause of the problem. There are three ways of attaching the plywood to the concrete floor. Please sign in to your account to take advantage of your online discounts. If you are working with wood subfloor, and you find that there are some extremely uneven surfaces, you may want to apply new plywood over the top of the subfloor. Although it is not common, there are some applications, where it is possible to install hardwood floors directly over concrete, without bothering to install a subfloor. Ceramic and porcelain tile are so frequently installed at or above grade level on a cement board underlayment or directly on plywood that it almost seems novel to install tile directly on concrete. Dricore Subfloor Installation Service Victorious Carpet Flooring. In such cases, special engineered hardwood flooring products are used. For this to be possible, the floor still must be leveled, if it was not made perfectly level and plane when it was poured. Dry the levelers for one day before installing vinyl planks over it. Do you need an underlayment for vinyl plank flooring? I have listed a couple of forgiving flooring materials – carpet and vinyl – to use over uneven concrete floors. Galvanized metal lath should then be installed over the plywood as a reinforcing material and to help the concrete to bond to the plywood. Mike Holmes Stop A Low Down Infiltrator National Post. A variety of different styles and finishes are available. Vinyl Tile. 5.3 - Screw each sleeper at least 2" into the concrete … The process of fixing an uneven subfloor depends on the type of material you’re dealing with and the cause of the problem. Before you can install carpet tiles, you must prepare the existing floor. ... Prep a Plywood Subfloor … In addition, leave a 3/4” gap around the edges of the floor or wherever the floor comes into contact with vertical structures, such as columns. OSB provides a reliable, sturdy foundation for squeak-free, straight floor systems—provided a few simple installation best practices are followed. This is particularly important if your old sub floor has lumps and bumps in it. For concrete … That porosity can make the concrete settle unevenly as the water soaks into the highly porous wood unevenly. A beautiful floor starts with a stable subfloor. That’s a rather expensive mistake to make. Tips for Plywood Subfloor Installation. Measure and cut the plywood panels so interlocking joints meet at the center of the sleepers. Lay the first plank against a corner wall. Read the flooring manufacturer's guidelines for the product you plan to install, and pay particular attention to requirements as regards the structure and moisture content of the concrete slab. When a subfloor becomes warped or delaminated (swells and deteriorates), it is no longer level or structurally sound. The first thing that needs to be done in this process is to ensure that the plywood floor is rigid. An additional layer of 3/4” plywood should be installed, with screws, over the existing subfloor. Any ridges found require filling with a flooring grade wood putty and then sanding to provide a smooth, continuous surface for the wood floor to be mounted to. If this gap is not provided, the flooring will ultimately become so wavy, that it needs to be repaired. Installing Plywood. Check the floor carefully for this and if necessary, level the floor, using the same kind of floor leveling compound mentioned above. Water damages the wood and will also damage the finish on the wood floor. Rather than tear out a wooden floor and installing concrete, your wooden floor can be turned into a beautiful concrete floor with a concrete microtopping. If you live in an area which is known for flooding or your particular home has a history of flooding, you may want to reconsider putting in a hardwood floor. The difference in the joint causes the planks to actually snap together, providing a positive lock. Step 1 – Lay the Plywood. 2.2. If you love solid wood floors and … For a concrete subfloor, you should install the plank with the sight lines of the floor. If needed, remove doors and use a circular saw to cut 1/8" above the level of where the finished floor will be. Second layer so that you can get the compound smooth glue shims together laminate flooring over concrete home. 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