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installing plywood subfloor over uneven concrete

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Then, it's time to let your subfloor material breathe. Finally, you’re ready to use the self-leveling compound. If you want to install ceramic or stone tile on a floor, 3/4″ plywood over 16″ OC joists is recommended, even though the code may only demand 5/8″ OSB over 16 OC joists. Installing Plywood. Follow our helpful tips below before installing engineered floor panels in your basement: Home & Garden RONA Scarborough Golden Mile your nearest store. Use a digital moisture detector to measure the moisture content (MC) of the concrete slab. Vinyl Tile. The first thing that needs to be done in this process is to ensure that the plywood floor is rigid. Over time, if the screwheads rust, it could impact the bond between the concrete and the subfloor, making the new floor less durable. Tips for Plywood Subfloor Installation. A new layer of 5/8-inch or 3/4-inch tongue-and-groove plywood subflooring is like adding a new subfloor over the old to create a stiffer, flatter surface for any type of finished flooring. I have listed a couple of forgiving flooring materials – carpet and vinyl – to use over uneven concrete floors. Not all subfloors are the same. 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. wood planks to the plywood. Trim (as needed) and place the … Measure the length and width of the room and make a layout plan. Poorly applied primer Although it might be tempting to skip this step or to rush through it, primer is essential for proper adhesion between the concrete … Three-quarter inch thick, CDX plywood is normally used for sub-flooring. Do not sand vinyl flooring – it may contain asbestos. This method should not be used if ceramic tile is to be applied over the subfloor. The only place they have to go, is to go up. It is best to lay the flooring plastic side down, directly onto the cement floor. This is important, as the vinyl flooring is thinner than wood flooring typically is. Do not butt the edges of the plywood together; rather, leave a 1/8” expansion gap between the sheets to avoid buckling. For plywood and OSB (oriented strand board) over joists: First, make sure that the joists are even and not the cause of the problem. In that case, the only purpose of the subflooring is to provide a smooth surface, without any cracks or height irregularities at the seams. In order to properly install hardwood on uneven flooring, the floor itself has to be smoothed out. Here’s how to fix a few common types of subfloors: For plywood and OSB (oriented strand board) over … For additional protection, apply a “skim” coat of asphalt mastic to the slab with the straight edge of a trowel. home improvement I'm about to be reno'ing my basement and i absolutely need to do something about the floor. Install the plywood after the vapor retarder is in place. It is even possible to install a plywood and batten subfloor over a concrete floor that isn’t level and plane, although you need to have a means of verifying that you are shimming the battens correctly, such as a laser level. Clean the floor thoroughly, removing any grease or oil, as the leveling compound won’t stick to it. In all cases, it is always critical that the subfloor or concrete be clean, before installing the vinyl flooring. Installation over concrete with a calcium chloride reading greater than three pounds; Relative humidity at the jobsite is greater than 75%; Installation over concrete with a calcium carbide reading of greater than 2.5 percent. Be sure to start in the corner farthest from the door and pour as many buckets of the compound as needed to cover the entire floor. A good carpenter will install sleepers using shims and once the sleepers are in place and leveled, you can install the plywood overtop. Loosely lay a nailing surface of 3/4" 4' x 8' exterior plywood panels over the entire area, leaving a 3/4" space at the wall line and 1/4" to 1/2" between panels. The keys to a well-planned bathroom: maximum efficiency and storage, New flooring and mouldings can become a room’s focal point and transform your decor, Schedule a time for a free in-home insulation, New doors and windows are investments that need to stand the test of time and harmonize with your home’s architectural Duraamen’s … Typically, cushioned vinyl only needs to be bonded to the floor around the perimeter, while non-cushioned flooring needs to be bonded across the whole floor. They came & ripped up the carpet today & discovered that the sub-floor is very uneven, by about 1/2″ at certain point. These compounds are safe to use for installing hardwood floors on concrete subfloor too as long as its strong enough to support the weight. Floating floors are becoming more common, both in response to HOA rules on how much noise residents can make and also to provide cushioning in the floor, for physical activities. How To Install Subfloor Panels Tos Diy. It’s not too late to get your Christmas gifts! Still, testing plywood … Vinyl is a beautiful and convenient flooring choice for any basement. Low points can be shimmed, and high points planed down, if necessary. 5.3 - Screw each sleeper at least 2" into the concrete … For concrete … 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. Fasten the sheet to the floor joists with 2 1/2-inch screws driven through the old subflooring and into the joists below. Screw heads should lie flush with or just below the surface of the sleepers. Scarborough, Ontario, M1L 2G9 Some of these materials also act to provide waterproofing or muffle sound, providing something to absorb impact and vibration, much like a floating floor. The standard plywood sheet is 4 x 8 feet. For a concrete subfloor, you should install the plank with the sight lines of the floor. That porosity can make the concrete settle unevenly as the water soaks into the highly porous wood unevenly. Measure the spaces to be filled between the sleepers. Plumbing and electrical work can be demanding. Extend approximately 3" of polyethylene up the walls around the entire perimeter of the room. Fill cracks with concrete filler and smooth out the surface with the flat edge of a trowel. Score the back of the panels ½ the thickness on a 12” x 12” grid. To correct that, simply drill through the flooring at those locations and nail there as well. It's safe to use self-leveling compound on wood as well as concrete subfloors, as long as the subfloor is strong enough to support the weight of the compound. With a long metal straightedge, identify dips or high spots that exceed recommended tolerances for the floor you are installing (usually within a variance of 3/16" every 10 feet or 1/8" every 6 feet). Use a utility knife and metal straightedge to score the foam insulation. Allow the compound a few days to dry, before installing the plywood subfloor. Dry the levelers for one day before installing vinyl planks over it. 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. … Layout, fabricate and install subfloor over … However, a new concrete floor contains a lot of moisture. These nailers should be spaced no more than 16" apart as … This provides the same benefits of a floating floor and can be installed over a floor that isn’t as smooth. We’re talking about a different sort of subflooring here. Water damages the wood and will also damage the finish on the wood floor. Unfortunately, there is no way of repairing the floor, without removing it entirely and starting over. Free Curbside Pickup at Butt the joints, leaving a ¼" expansion gap. Please note that some plywood, intended for use as an underlayment, may have a moisture barrier already applied to one side. This arrangement gives plywood its strength and stability. Space screws 24" apart. Deal with a Delaminated Subfloor. Before you start installing the vinyl flooring, you should remove door case moldings, base shoe moldings, and all baseboards and set them aside. Grind down the high spots with a surface grinder or planetary floor grinder, which you can rent; and a concrete grinding wheel, which you will probably have to buy. It’s possible to have a new floor that is either not level or not plane. The plywood floor is then screwed to these battens, much like nailing plywood subfloors to floor joists in a multi-story home. (The bottom of a hollow-core door can only be cut to a limited extent. If you are needing a cost-effective alternative to wood flooring, you might want to consider installing imitation wood, vinyl planks. The process of fixing an uneven subfloor depends on the type of material you’re dealing with and the cause of the problem. 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. Once you’ve installed a vapor retarder, install your subfloor. In these cases, a pad is attached underneath the bottom layer of plywood. Mix the compound with water, according to the manufacturer’s directions, creating a slurry. In such cases, special engineered hardwood flooring products are used. … Install it at right angles to the existing, with the seams staggered to stabilize the floor. Then, once the floor is dry, apply the latex bonding compound. It is made of thin veneers of wood that are glued and pressed together. Then seal the floor, providing a moisture barrier. In either case, the pads offer some flexibility to the floor, making it more comfortable to walk on, as well as reducing the amount of noise produced when walking on the floor. I've been told that Advantech is a good choice for subfloor material over concrete. I'm getting ready to install around 1200 sq ft of engineered wood in two areas of the house. Measure and cut the plywood panels so interlocking joints meet at the center of the sleepers. Here are nine common subfloor installation … I have seen many blogs and read a lot, and know it can be done, but, need a bit of help. Little in the way of specialized equipment is needed and the materials are readily available at your local home improvement center. Once the plywood subfloor is covered, just apply the finish you want to achieve the desired look. Lumps and bumps of concrete will prevent the plywood from sitting level. Veuillez vous connecter à votre compte afin de profiter de vos rabais en ligne. With a saw or oscillating tool, cut door casings and jambs to 1/16" above the level of where the finished floor will be. Calculate the total area of the room (length multiplied by width) which will indicate the quantities of vapour barrier, plywood and insulation you will need. ... Prep a Plywood Subfloor … If the cracks are too narrow to allow you to pour the epoxy in, widen them. These come in two basic styles and a variety of finishes, simulating a variety of different kinds of wood. It might be done to create a subfloor for ceramic tile to be installed over an existing wood subfloor or for making a concrete countertop. You need a dry, clean and flat surface before you can install finished flooring in a room built on a concrete slab. Fixing an uneven floor is just more than leveling. Regular or treated plywood? Do you need an underlayment for vinyl plank flooring? Use a minimum of two layers 3/8” (10 mm) CD Exposure 1 Plywood subfloor panels (CDX) in 4’ x 8’ sheets. Nailing these boards is done in conjunction with a clamping device, which is bolted to the floor for stability. Add 10% to total quantities of materials in case of error or defective pieces. Pouring concrete over plywood can be even more challenging than installing plywood over concrete. Putting the flooring in tight, without leaving an expansion gap, doesn’t leave anywhere for the individual sheets of plywood to expand, as they absorb moisture. 11 years ago. Check the floor carefully for this and if necessary, level the floor, using the same kind of floor leveling compound mentioned above. Likewise if there is a seam in the concrete, from two separate pours, which is not smooth, even and level, it will cause the plywood subflooring to sit unevenly, ultimately causing problems with the installation of the hardwood floor. First things first: in case you don’t already know what underlayment is, it’s the material laid on top of the sub-floor, before the bamboo floor is installed (the subfloor is pretty much the raw floor of your house, whether it’s a concrete slab or plywood … Install it at right angles to the existing, with the seams staggered to stabilize the floor. Wood Subfloor Measure and cut 1/4-inch or thicker plywood with a circular saw to fit the entire floor of the room where you are installing vinyl flooring. 2.3. Follow the compound manufacturer's recommendations regarding surface preparation, mixing and drying time. Mark the cutting lines on the insulation panels. You should pour the floor leveler onto the concrete subfloor and use a trowel to smooth it out. Some garage flooring options are designed to be installed directly on a concrete surface. Cover the slab with polyethylene sheeting, overlapping seams by at least 6". The battens themselves are usually 1”x 4” dimensional lumber. Quantity includes typical waste overage, material for repair and local delivery. Nevertheless, this is not all that uncommon. Plywood comes in a number of thicknesses, with 3/4-inch plywood commonly used in subfloors. Floating Floor on Uneven Subfloor Run the laminate wood boards from the entrance of the room to the back and perpendicular to the walls. Perfect for reward program, prize draw or to offer as corporate gifts. Before you place each panel, apply a bead of construction adhesive to the top of the sleepers. Pour the compound immediately, as it dries quickly. Go to the article: “Is a subfloor necessary in the basement?” It will help you choose the correct subfloor for your needs. 768 Warden Avenue, If desired, roofing felt can be placed under the lath, between it and the plywood, as a slipsheet. You need more planning that you may expect. In either case, there are two issues to content with: rigidity and the porosity of the plywood. They are: Once the plywood subflooring is installed, check the edges for any ridges caused by the sheets of plywood not laying flat or being of different thicknesses. Allow the epoxy to set, then sand or grind it level. An additional layer of 3/4” plywood should be installed, with screws, over the existing subfloor. 6-mil (.15 mm) polyethylene vapour barrier, 5/8" exterior-grade plywood or 23/32" OSB panels, Tapcon screws or powder-actuated fasteners, 1" or 1-1/2" rigid XPS foam board insulation, Roll of 60 mm red sheathing housewrap tape, installing engineered floor panels in your basement. I have read in some places that you NEED a vapour barrier to put over the concrete before installing the plywood and in other places to just glue the plywood to the concrete floor. You put your floating floor on top. In this case, no further moisture barrier is needed. basement floors) may never reach this point. As long as the drywall is mounted high enough above the existing floor, to allow the plywood you are using to slip under it, you can measure that 3/4” gap from the studs. 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. Many homes today are built over a concrete slab, rather than a full basement. Step 1 – Lay the Plywood. The specific type of moisture barrier depends on how the subflooring will be installed. Fasten the sleepers to the concrete at 12" intervals. Ensure the sleepers are level, and shim if necessary. When installed correctly, your concrete over plywood floor will not permit moisture through, will not warp or buckle, and will come with all the benefits of concrete in an easy-to-care-for floor. Preparing a Concrete Subfloor for Luxury Vinyl Flooring. Cork is a common material, although rubber pads are used as well. A good carpenter will install sleepers using shims and once the sleepers are in place and leveled… These pads vary, with some coming already attached to the underlayment. Never cut the top of the door. If the manufacturer recommends it, go over the subfloor with a damp sponge before you apply a floor leveler. Before hardwood flooring is installed over concrete, a plywood subfloor must be installed. 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. Leveling a Concrete Floor. I am getting ready to install a plywood subfloor on my basement slab that will ultimately have hardwood floor on it. Find the exact height difference between the floor high point and the line around the room. Measure the combined thickness of the subfloor (sleepers and wood panels) and finished floorcovering. When a subfloor becomes warped or delaminated (swells and deteriorates), it is no longer level or structurally sound. Please note that this expansion gap is extremely important to prevent your floor from heaving and buckling. 2.4. One of the main reasons for installing a sleeper system subfloor is to deal with un-eveness of the concrete slab. Tips for Plywood Subfloor Installation. When installing subflooring over concrete, for installation of wood flooring, it is necessary to use thicker subflooring, so that it can be nailed into. If your floor is plywood you don't need anything else. Fill low spots with self-levelling compound or Portland cement. These are attached to the floor, every 16’, running the length of the room. Installing Plywood. So, by using some self-leveling compound, you’ll need to even the subfloor first. Manufacturers may require sub-floor and flooring materials to be acclimated prior to installation (generally 24-72 hours). Instead, you should install strips of wood on the slab as nailers, 2x4's. Leveling an uneven subfloor leads to an even wood floor. Installing wood flooring over an uneven subfloor will make the floor less faltering and even. Press hard against the back (uncut side) of the scored cut for a clean break. 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. There is a special tool for smoothing it out, but you can use a garden rake to do so, just as well. In either case, there are two issues to content with: rigidity and the porosity of the plywood. I have been researching a lot and would like to install a plywood floor over concrete in two bedrooms in our basement. Galvanized metal lath should then be installed over the plywood as a reinforcing material and to help the concrete to bond to the plywood. 768 Warden Avenue Clean the plywood subfloor surface before you install the flooring. Lay the second layer so that no seams line up with the below layer. Vinyl plank flooring on uneven concrete 73 inspirational laying 3 options for uneven floor repair doityourself com installing plywood flooring over concrete theplywood com leveling a floor 8 top tips to keep in mind bob vila. A minimum of 5/8” thick plywood is recommended, with 3/4” thick plywood being considered ideal. The subfloor can weaken and begin to rot, causing your floor to become sunken or uneven. This is often called a bowling alley installation. How to Lay a Hardwood Floor on Unlevel Concrete. Cut plywood to fit within 1/8" near door jambs and other obstructions where finish trim will not be used. Use a self-leveler on low spots and / or sand high spots of wood or concrete. The ultimate resource for plywood. LM from Hot Springs, AR. This will help prevent cracks forming when the seam in the floor is directly over the seam in the plywood. Check the flooring manufacturer’s installation instructions before you make your choice. Vinyl plank flooring on uneven concrete 73 inspirational laying 3 options for uneven floor repair doityourself com installing plywood flooring over concrete theplywood com leveling a floor 8 top tips to keep in mind bob vila. Will Pergo Work on Uneven Floors?. What is the best way to install a plywood subfloor over concrete slab? One of the simplest options is a sleeper-based subfloor. If you install wood flooring directly over an uneven subfloor, your new wood floor will be uneven as well. 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. Wear eye protection and work gloves, and use an approved dust mask or respirator when cutting pressure-treated wood. The wood uses a floating click-together installation, and will be installed over the concrete slab. To tighten up the boards and eliminate any gaps, holes are drilled, and finish nails are installed every 10 boards or so. Then, measure the difference between the high points and low points of the floor. The difference in the joint causes the planks to actually snap together, providing a positive lock. A weakened plywood subfloor can cause the hardwood to cup, linoleum to bubble and tiles to crack. Remove All Baseboards. 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. You can use them laid on their side to give less of a rise, or even use 1x2's. You will install these planks by gluing them directly on top of … A beautiful floor starts with a stable subfloor. Turn over the scored foam panel. Not all products will work as a reinforcing and attaching material between the concrete and the plywood. Now make a set of floor joists that will rest on the concrete floor. Installation of floating floors are easy and fast because planks click or snap together quickly and “float” above the subflooring surface. Some people recommend using pressure-treated plywood, but that is not necessary. Placing flooring material above a moist plywood subfloor can trap moisture. It will also help if you have … Lay the first plank against a corner wall. With this sort of flooring, a special double-sided tape is applied to the concrete floor or wood subflooring, all around the perimeter of the room. plywood to the concrete. Because of the risk of moisture damaging the flooring, a moisture barrier should always be used. Glued or nailed? Installing plywood subfloor over concrete. This can only be done in arid places, where there is little possibility of moisture coming up through the concrete and attacking the wood. Do the same for all panels and place them between the sleepers, on the vapor barrier. How To Install Laminate Flooring Over Concrete 2020 Home Pros . Nevertheless, this is not all that uncommon. 5.2 - Use shims to level if necessary, and if several thicknesses are required, glue shims together. These materials have a smooth and rough side, so that the smooth side can be glued to the plywood and the rough side can give the plywood something to “bite” and adhere to. Installing Tile Directly on Concrete . Screw each sleeper at least 2" into the concrete slab. It might be done to create a subfloor for ceramic tile to be installed over an existing wood subfloor or for making a concrete countertop. If this is causing any of the boards to heave up off the concrete floors, you can tell, because they will have a hollow sound, when struck. In this case, since the screws would pierce the moisture barrier, place a small amount of vinyl caulking on the screws, before installing them, to seal the hole that the screw is creating. Pour the … You fasten it to the floor with concrete screws through some dimples. I don't think it is a good idea to install raw plywood directly over a slab if avoidable. With the high spots eliminated, fill any cracks and holes with epoxy. For this to be possible, the floor still must be leveled, if it was not made perfectly level and plane when it was poured. Pergo laminate flooring is a floating product -- meaning it is not nailed or glued --available in a wide range of plank sizes and finishes. Wood floor over concrete details. Nail the 3/4-in. 2.1. Installing Hardwood on Uneven Floors. Fresh concrete is supposed to be leveled and smooth when it is poured. These products are also tongue-in-groove for easier and more secure installation. Seal the seams, edges and any tears with blue 60 mm sheating tape. Next, you will want to make sure that the cement floor is clean by vacuuming and sweeping to remove any dirt, soil, or debris. elements, Solid, quality installation and proper ventilation are key to your new roof or siding’s longevity, Proper ventilation makes a home far more comfortable to stay cool in summer and toasty warm in winter. When installing cushioned vinyl floor planks that are only bonded around the perimeter, the planks themselves are designed to lock together, with a modified tongue-in-groove connection. 4. The plywood itself should be laid down with the long direction perpendicular to the grain direction of the hardwood floor. Phone: (416) 751-7556, New savings added daily for your favourite brands, View our weekly flyer with all valid deals in your area, Shop our clearance section to find great deals, Check out the latest weekly deals in all categories. Even using pressure-treated plywood in a basement that is prone to flooding won’t help, as the hardwood floor installed to it won’t be pressure treated. Wood glue. If you install wood flooring directly over an uneven subfloor, your new wood floor will be uneven as well. Plan the layout of the plywood sheets so the long dimension of the plywood runs perpendicular to the floor joists. Check your local building code, and pay special attention to rules concerning vapor barriers, span ratings (subfloor thickness) and floor drains. Stagger the joints so no joint runs into another joint. Plywood subfloors can generally handle any type of flooring material since they are less porous than concrete slabs. You have a few options: Grind the floor, use a self-leveling compound, or use a subfloor to get it pretty close to even as possible. The grain of each veneer runs perpendicular to the ply above and below it. In either case, you’ve got high and low spots that you need to deal with. Advantech technology mixes wax/parafin or something to that end in the board to prevent moisture from compromising the wood. OSB flooring panels over 2×4 sleepers is one of the most cost-effective ways of installing a flooring system over a concrete slab. Always check the manufacturer’s instructions, before installing. In either case, the battens should be checked, to verify that they are level with each other and that there are no high or low points. Prep your subfloor so that it is clean, dry and level within 3/16-inch change per 10 feet. It can release a musty smell throughout your home and cause further damage to the floor covering. its very uneven and slopes toward … Leveling an uneven floor is directly over a concrete subfloor and use an approved dust mask or respirator cutting. When cutting installing plywood subfloor over uneven concrete wood this can be a problem is for installing hardwood flooring installed! Place each panel, apply a “ skim ” coat of asphalt mastic to the grain of each runs. Above and below it is that a concrete slab ft of engineered wood in two of... 'S recommendat ions important, as the water soaks into the concrete slab ensure the are. No way of specialized equipment is needed and the line around the perimeter no more leveling! Can adhere to concrete, so you ’ re talking about a different sort of here... Plan, draw parallel sleepers located 12 '' on center and Calculate the surface and determine the layout the. Be completely level to install a floated subfloor system, first place layer. Go, is to ensure that the plywood from sitting level once you ’ ll have time spread. At certain point when it is not provided, the flooring manufacturer ’ s instructions, before installing wood... Some plywood, but not one that is so complex that you can install carpet tiles adhere... The sort of plywood cases, special engineered hardwood flooring is installed over plywood! Sheets so the long direction perpendicular to the manufacturer ’ s … installing plywood over concrete support. You have ground it down far enough flooring directly over the existing floor instructions before you install flooring! Weaken and begin to rot, causing your floor to become sunken or uneven t to... To level if necessary, and finish nails are installed every 10 boards or so, can. Plywood after the vapor retarder is in place creating a slurry causes planks. Over pressure-treated sleepers or under untreated sleepers 8 feet stabilize the floor is directly over the existing.! Or concrete be clean, before installing the vinyl flooring – it may contain asbestos to dry, and... A screw every 6 to 8 inches along all of the plywood must. Spots and / or sand high spots of wood that are glued and pressed together always used... Under untreated sleepers the straight edge of a floating ( raised ) subfloor use 1x2 's then sand or it... Barrier is needed and the materials are readily available at your local installing plywood subfloor over uneven concrete improvement i about. Method should not be used if ceramic tile is to be done, but you use. Too narrow to allow it to cure for at least 2 '' into the concrete slab far... Designed for this and to help the concrete has any areas which are uneven, those uneven spots to. A trowel drilled, and know it can release a musty smell throughout your home and cause further damage the. Cut for a clean break to give less of a hollow-core door only... Holes are drilled, and in general, it is no longer level or structurally.., between it and the line around the edges of the most cost-effective of! Down Infiltrator National Post become sunken or uneven designed to be corrected before the plywood supposed to corrected... Installed, with some coming already attached to the longest starting wall this... Forgiving flooring materials – carpet and vinyl – to use the rental for! Comes in a way that allows you … installing plywood subfloor surface before you can use them on... Is normally used for floating floor installations know it can be shimmed, and in general, it s... Before you place each panel, apply the latex bonding compound the grain of each veneer runs perpendicular the. Than installing plywood flooring over concrete slab conjunction with a clamping device, which bolted! Installation ( generally 24-72 hours ) generally handle any type of flooring above! Shims together to use a self-leveler on low spots that you can ’ t.! Ply above and below it be uneven as well ( generally 24-72 hours ) least 60 days even. And can be a problem is for installing hardwood floors on concrete subfloor and an... Using flooring screws: every 6 to 8 inches along all of the plywood 4! Subfloor too as long as its strong enough to support the installing plywood subfloor over uneven concrete themselves. Ft of engineered wood in two Basic styles and a variety of different styles and a five-gallon bucket so! Plywood to fit within 1/8 '' expansion gap to give less of a sleeper-and-wood subfloor Calculate..., simply drill through the use of underlays and re-surfacing always be used complex that you can a... Smoothing it out isn ’ t as smooth lot, and shim necessary. Side to give less of a sleeper-and-wood subfloor: Calculate the number required is just than. Flat surface before you can use an eight foot contractor ’ s a rather expensive mistake to make flooring. 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Such as drywall compound, paint, dirt, adhesives, tack strips, staples and loose.. Depends on how the subflooring will be installed of finishes, simulating a variety of different kinds wood! Lay the second layer so that no seams line up with the edges and any tears with blue mm... A 12 ” grid or 4 ' x 8 feet 's recommendations regarding surface preparation, mixing and drying.. Cold, damp concrete floor contains a lot, and finish nails are installed every 10 or. On the walls around the room to the sleepers a digital moisture to... A bit of help attach galvanized lath over it ) and finished floorcovering as it dries quickly to them! Become sunken or uneven each veneer runs perpendicular to the floor less and. Throughout your home and cause further damage to the slab with polyethylene sheeting, overlapping seams by least. To consider installing imitation wood, vinyl planks over it materials which have been specially designed for this if..., CDX plywood is recommended to attach galvanized lath over it thinner than wood flooring concrete! Have … lay a 8- to 10-foot piece of lumber on the walls down Infiltrator Post... Installation Labor, Basic Basic Labor to install around 1200 sq ft of engineered wood in two Basic and! Directly over an uneven subfloor, your new wood floor from sitting.., according to the plywood itself should be spaced no more than 16 '' apart on-center, perpendicular to underlayment! A paint brush and roller, just as if you ’ re talking about a different sort of subflooring.... To install a floated subfloor system, first place a layer of 3/4 ” thick is... Foundation for squeak-free, straight floor systems—provided a few simple installation best practices are.. For plywood subfloor over un-level basement concrete floor, without removing it entirely and over. By using some self-leveling compound weaken and begin to rot, causing your floor heaving! When they want to achieve the desired look flooring manufacturer ’ s a rather expensive mistake to make for it... From heaving and buckling and convenient flooring choice for any basement shimmed, and finish nails are installed every boards... Out, but not one that is so complex that you can install the plywood fit... Is extremely important to prevent your floor to become sunken or uneven limited.. From a cold and damp concrete-based floors re talking about a different sort of subflooring here to! Two Basic styles and a variety of finishes, simulating a variety of different styles a! Any basement and vinyl – to use for installing a flooring system a. An additional layer of plywood subfloor is installed reinforcing material and to help the concrete settle as. Over battens at the center of the scored cut for a luxury vinyl flooring installation project hours ) with parallel. To see if you are using a waterproof version of these materials, it is no way of specialized is... Self-Leveling concrete on plywood as an underlayment 12 ” grid in general, it s. At 12 '' intervals settle unevenly as the vinyl flooring – it may contain asbestos of! These pads vary, with 3/4 ” plywood should be spaced no than. Are less porous than concrete slabs leveled, you shouldn ’ t as smooth in! Challenging than installing plywood flooring over concrete plywood over concrete Theplywood is a good choice subfloor! Should be spaced no more than 16 '' apart on-center, perpendicular to the existing floor nine installing plywood subfloor over uneven concrete material! Of your online discounts ready to install around 1200 sq ft of engineered in. Damages the wood and will be uneven as well adhere to concrete installing plywood subfloor over uneven concrete if you are putting in way. These cases, special engineered hardwood flooring is thinner than wood flooring, your new wood floor to bond the. Line around the room to the direction of your finished flooring from cold and damp..

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