Typically made of plywood or OSB and ranging in thickness from 19/32" to 1 1/8" thick, the subfloor is truly structural, second only to joists in this respect. Older homes may have solid hardwood flooring nailed directly on the joists—no subfloor. Except for those that have concrete slabs, all houses have joists. Cracking and popping tiles are a sure sign that … In basements and in homes with slab-on-grade foundations, the subfloor may simply be a concrete slab. The subfloor is the thick flat surface on which all other layers rest. How to Choose the Right Subfloor Leveling Techniques, 4 Basement Subfloor Options For a Dry, Warm Floor Covering, Subfloor Heating Systems With Embedded Radiant Heating, Laminate Underlayment: What to Know Before Installation, Subfloor Systems: Eliminate Building a Subfloor From Scratch, How to Prepare a Vinyl or Linoleum Floor for Ceramic Tile, How to Choose the Best Underlayment for Laminate Flooring. Removing both of these things left behind OBVIOUS water damage and rot next to the bathtub and a hole in the floor where the plumber had capped off the bidet line. Lee has over two decades of hands-on experience remodeling, fixing, and improving homes, and has been providing home improvement advice for over 12 years. If installed over concrete, the recommended subfloor is either 3/4-inch-thick plywood or 2x4s, and a vapor barrier of either asphalt felt and mastic or polyethylene film is required. Write CSS OR LESS and hit save. When you remove the floor covering, you will see more flooring underneath—possibly underlayment, definitely subfloor. My plan for the floor is to install 3/4” plywood underlayment on top of the existing diagonal wood plank subfloor and then eventually lay tile. Preparing a subfloor is an essential step for installing floor tile.It provides a level surface that will allow the tiles to properly stay in place. 8. The ply needs sealing underside and sides, 2mm joint left between the boards and the sheets staggered. If you are installing solid hardwood or engineered wood, you may be putting down an underlayment of plywood. Substrate is a general term that means any surface below another surface but which, in the home remodeling world, most often refers to the stabilizing layer of material directly beneath the finish floor. Apply only enough adhesive for 2 to 3 panels at a time. Alternatively, you can choose to install a cement backer board as your subfloor or as an addition for support and structure. Traditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. What length screw should I use to affix into the joists? This guide will show you how to prepare your subfloor for a tile installation project to ensure that it’s fit to support ceramic or porcelain tile. When choosing your subfloor material, take into consideration how the thickness will effect the overall heigh of the built up shower pan in relation to your shower curb. CDX plywood (¾”) in particular is used often because it has a high level of resistance to moisture and humidity. Due to water damage, I need to level and replace the flooring. Before I put down the subfloor or after, do I need to treat the ply with anything? 4. When choosing your subfloor material, take into consideration how the thickness will effect the overall heigh of the built up shower pan in relation to your shower curb. Typically made of plywood or OSB and ranging in thickness from 19/32" to 1 1/8" thick, the subfloor is truly structural, second only to joists in this respect. Can You Add Padding Under a Hardwood Floor? For example, base flooring layers need to be firm, flat, and deflection-free for ceramic tile or natural stone. 1. On the other hand, the floors sometimes have more than three layers. For wet, mortared applications, such as tile and stone, a cement backer board may be your first level below the flooring. For joist spans 19.2–24 inches, NWFA "Installation Guidelines" recommend a minimum panel thickness of 7⁄8-inch OSB or plywood; the minimum building code (which most builders build to) … The thicknesses are as follows: 7/16-, 15/32- and 1/2-inch-thick panels require joists spaced 16 inches on center; 19/32- and 5/8-inch-thick panels require joists spaced 20 inches on center. A typical subfloor is comprised of 4 x 8 or 4 x 12-foot sheets of 1/2-inch or 3/4-inch thick A/C-graded plywood nailed or screwed to the joist layer. I plan to use the same thickness. T-square drill pencil circular saw chalk line … When the previous owners remodeled the bathroom forever ago, they added additional subfloor for God only knows why. If you have a concrete slab floor, the slab may be considered the subfloor. The floor must also handle the weight of the tub, shower, tiles and other fixtures. We also smartly list products and services to help in moving your project along. 9. If you have a concrete slab floor, the slab may be considered the subfloor. Layering makes it easier to change the visible floor if you tire of the look or if it has become damaged. 23/32. Bang on advice above. I have been told everything from 1 inch to 3 inches. over the 3/4 in. 15/32. Called a floor covering or finish floor, this might be ceramic tile, solid wood, laminate, engineered wood, luxury vinyl, carpeting, and many others. In the upstairs, there is a large area of subfloor that is 1", but then there is a large area that is down 1/2" from that … The subfloor is the bottom-most layer and it rests on the joists. Enough adhesive for 2 to 3 panels at a time that usually means the and... Have only one layer of flooring level below the flooring tape measure example: old homes that have been everything... 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