The superb idea has been shared in this article. If you have a weak subfloor that flexes up and down when walked on I would recommended adding an additional layer of 3/8 or 1/2 inch thick plywood underlayment glued and screwed down over a 5/8" or 3/4" thick subfloor to add stability. Plywood or OSB (flakeboard) can expand and contract at too high a rate to be a stable foundation for tile. Glued or nailed? How to install subfloor sleepers over slab in the basement and other rooms with a concrete floor. Fourth; layout control joints at all inside corners in the slab, they should relate to the architecture but try to get as many as you can, see this diagram http://www.concretenetwork.com/concrete/slabs/controljoints.htm Fifth; if all else fails and cracks appear that you cannot live with, you can pour a micro topping to even everything out. You can either roll on a liquid latex membrane or use a peel-and-stick crack prevention mat over the entire concrete subfloor. We recommend applying Param 5500 at a minimum thickness of 3/8” (1/2" is … installing subfloor over un-level basement concrete floor? When we recently received a call from a home owner in Hoboken, NJ asking us how epoxy coating can be installed over wood, we recommended the following process - a. Use a minimum 3/4” (23/32, 18.3 mm) subfloor panel cut to smaller 2’ x 8’ or 4’ x 4’ sections. When you attach … More detailed information about wood subflooring installed over concrete is available in the NWFA Wood Flooring Installation Guidelines and Methods publication, or at member.nwfa.org/default.asp?page=InstallGuidelines. I want to install hardwood flooring Visit – https://workmanflooring.com/best-hardwood-floors-for-utahs-homes/ on the concrete floor surface. Laid down and shined up, plywood can run with the big flooring boys at an affordable price, It’s been a staple sturdy raw material for a long time, but now plywood is becoming a feature in its own right, Of course you've heard of it, but you might not know all the uses and benefits of this workhorse building material, Exposed plywood and beams, rough concrete and unfinished walls give the interiors a unique look — and give the family more time together, Straight, diagonal, chevron, parquet and more. Quantity includes typical waste overage, material for repair and local delivery. When the adhesive requires, add a moisture control system before applying the adhesive. Once you’ve installed a vapor retarder, install your subfloor. You really should not use pressure treated lumber indoors, but a moisture barrier over it would retard migration of any hazardous chemicals into the house air. There is a product you can buy from your local home depot store for putting under a floor over concrete. Floating plywood system. The nailing schedule for the flooring being installed becomes a factor to the spacing of these screeds. Decorative Concrete, Decorative Concrete Coatings. A: Howard Brickman responds: Concrete is a good substrate for installing wood flooring if proper precautions are taken to ensure that excessive moisture conditions are detected prior to installation,and controlled during the life of the floor. 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. Should the plywood be glued to the slab (easier) or nailed (more difficult and time consuming) or both? Lay 6-mil polyethylene sheeting over the concrete to minimize moisture migration from the concrete up into the wood flooring. Because it raises the finished floor by an extra 1 1/2 inches -- and for other reasons -- the sleeper method has fallen into disuse. Metal lath stapled over plywood substrate. Your email address will not be published. Concrete is a sponge for any moisture trapped beneath it. It looks like a great project, hopefully these tips help. Different methods may be necessary depending on the subfloor system and/or the flooring being installed. Plastic for vapor barrier between plywood and slab? This finished tile floor is installed over a plywood and cement backer board subfloor. Hope you have some serious change to cover that expense....but your floor will hold up forever and will match exactly... BTW...early in my career I did an 3/4" oak floor over an architect designed sleeper system set in concrete. Is there a better way to do it rather than shaving it off? Always follow the flooring manufacturer’s recommendations for adequate and recommended subfloor system requirements below their flooring. In on-grade and below-grade installations, moisture control systems are always recommended, and required when calcium chloride readings are greater than three pounds, or when relative humidity readings are greater than 75 percent. 134 square feet: $79.10: $91.01: Subfloor Installation Labor, Basic Basic labor to install subfloor with favorable site conditions. I would've thought backer board would wind up being more expensive, but that might be worth considering. All houses need subfloors. Moisture and hardwood are enemies. good luck. One way to attach plywood to a concrete surface is to screw it into place with concrete fasteners. Then fasten 3/4-in. A moisture control membrane is recommended any time a wood subfloor is installed over concrete. Were you able to find it cheaper? by Admin February 17, 2011. politicaux. Although I resent the implication that I know nothing, I'll check them out, and thanks. Use a minimum 3/4” (23/32, 18.3 mm) 4’ x 8’ subfloor panels. How to Install Natural Bamboo Flooring Over a Plywood Subfloor. For nail-down wood subfloors installed on-grade and below-grade, add a moisture control system below the subfloor material. I sell engineered antique heart pine and engineered antique oak for a concrete subfloor, heck i even sell a 1/2" solid antique heart pine that can be glued straight to the concrete if you will use bostix best glue...take a look at how i do things at my website and if you want me to quote you , send me a square footage of what your looking for and where your at and i will do a shipping quote. I had easily 3" difference between the two rooms. Glue-Down Place a 6-mil polyethylene vapor barrier over the concrete. Pressure treated plywood will rot, but alot slower than untreated. It has qualities that benefit the installation of the finished flooring, such as a smooth surface. Subfloor Options For Basements. wood planks to the plywood. More than likely you will get cracks in a slab that thin but there are some things you can do to try and reduce the occurrence. Wood structural panels suitable for use as subflooring material should be plywood or oriented strand board (OSB) with a bond classification of Exposure 1 or Exterior. If you really want to install a solid hardwood floor, it will cost extra as first you will need to install a 3/4″ plywood subfloor. See which floor design is best for your space, Discover the appeal of budget-friendly plywood, concrete and other modest surfaces, Do you love perfection or patina? The installation of calcium aluminate cement based self-leveling concrete, Param 5500 along with expanded metal lath for reinforcement is a successful fast-track method to convert a plywood subfloor into a beautiful concrete floor. This will work regardless of room temperture, and will lock out moisture if that is a concern of yours as well. Being engineered wood, I understand it can go straight onto the concrete with a moisture barrier underneath. Cut plywood to fit within 1/8" near door jambs and other obstructions where finish trim will not be used. Your email address will not be published. How-to install a wood subfloor over concrete . Any other tips for installation would be much appreciated as well! For best results, several areas of each room should be tested for excess moisture. 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. I don't think it is a good idea to install raw plywood directly over a slab if avoidable. For a concrete subfloor, you should install the plank with the sight lines of the floor. Maybe you can advice on something different all together. To prevent that movement from creating cracks in your grout and tile, install a crack prevention membrane after the concrete subfloor is clean, flat and free of cracks larger than 1/8-inch. The customer should be fully aware of the system being used, the additional costs incurred, and the time necessary to complete the entire project. These general rules hold true for all three of the following subfloor installation methods. Installation over screed systems includes properly spaced and oriented screeds laid perpendicular to the direction of the flooring and across two or more spans. Notify me of follow-up comments by email. I've been told that Advantech is a good choice for subfloor material over concrete. Do not penetrate the vapor retarder. Cut the plywood panels to … In either case, there are two issues to content with: rigidity and the porosity of the plywood. Brett Miller is VP of Education & Certification at the National Wood Flooring Association in St. Louis. Find here detailed information about subfloor installation … The wood subfloor panels used in these scenarios should conform to most current U.S. Leave a 1/4″ gap between the backer board and walls and 1/16” gap between the sheets of backer board. If this something possible to do, how much OSB plywood can I shave off? Solid 3/4”, 25/32”, and 33/32” T&G strip flooring may be installed directly to screeds. 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. Pouring concrete over plywood can be even more challenging than installing plywood over concrete. home improvement. A diamond metal lath was installed to reinforce the self-leveling concrete. Check the slab under the plastic after 24-48 hours. It will also act as another moisture barrier below your floor and it should not break down. It was an inexpensive way to accomplish a lift with a product that was not going to support mold and mildew growth. Install it at right angles to the existing, with the seams staggered to stabilize the floor. Adding this extra layer will definitely cost you more and add some height. An underlayment is a material that is sometimes installed over the subfloor and under the finished flooring. If you have an irregularly shaped room, divide it into smaller squares and rectangles, and calculate the square footage of each smaller area; then add them all together. The installation of calcium aluminate cement based self-leveling concrete, Param 5500 along with expanded metal lath for reinforcement is a successful fast-track method to convert a plywood subfloor into a beautiful concrete floor. Also, donâ t forget to wear proper safety Also what shingles, paper or leveling compounds you would recommend to use for lower areas? if not you might be able to get a bit thicker slab (2 1/2" or 3") at the same weight. When the adhesive requires, add a moisture control system before applying the adhesive. Nice article. This also applies to joists depth. Alternative wood-based structural panels are permitted if recognized in a current evaluation report from an approved testing source as satisfying the requirements for subflooring in the governing building code. In many homes, plywood was chosen as a flooring substrate and applying concrete over plywood gives you more options for using what you already have. Average cost to install subfloor is about $2,400 - $5,500 (concrete subflooring for 300 sq. Consider both load bearing capacity and deflective properties when selecting subfloor materials. What is the best way to install a plywood subfloor over concrete slab? Download our Pergo Installation Essentials Guide below or view our simple tutorial videos to see the process. 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. Nail-Down I think I would run this by the experts over at : www.johnbridge.com and see what they have to say about it. The elevation gain that coincides with these installation methods also may affect much more than just the baseboards and trim work; you must also take into account the inward swinging doors, appliances, plumbing fixtures, and anything else that may come into contact with the floor. Design Workshop: The Beauty of Humble Materials, Using White Marble: Hot Debate Over a Classic Beauty. How to install a wood plank floor over concrete Wood floor over concrete details Lay a plastic moisture barrier and then screw 3/4-in. Stagger panel joints allowing approximately 1/8” expansion space around all panels to prevent edge peaking due to compression caused by panel swell. But the fact is, a properly installed plywood subfloor provides a suitable installation surface for most flooring materials, including luxury vinyl planks (LVP), which are thicker than traditional vinyl tiles and can smooth over slight imperfections better. Terminology...a sleeper is a structural member that rests on something else. As far as using plywood, I'd love to not use pressure treated but wouldn't it slowly rot if it was in direct contact with the cement slab? You will need to run that by your structural engineer of course. When fastening the subfloor into the slab, be mindful that each penetration also creates a hole in the moisture control membrane, which could become a source for moisture entry into the wood floor system. Subfloor Cost Non-discounted retail pricing for: 23/32" tongue and groove OSB subfloor. It can be installed on top of concrete before hardwood flooring or another type of material is installed. Third; if not already specified, you can use a dense welded wire mesh (like 4x4) to try and prevent cracking. Lay 1/2-inch plywood sheets along the long axis of the room. Regardless of the installation method, it is necessary to take into account the additional costs involved with these underlayment systems. Use nominal 5/8” (19/ 32, 15.1mm) CD Exposure 1 Plywood subfloor panels, (Exposure 1), 4’x8’ sheets. I was searching for such type of article and you have shared what I was looking for. Within three months the moisture trapped in the void areas...under the plywood! For floated wood subfloors installed on-grade and below-grade, be certain moisture control is taken into account. Don't glue the plywood to the concrete. Mostly this is due to lack of availability of 1/2" t/g plywood. Get out the jack hammer and get rid of the concrete. 2. If the concrete is darker under the plastic than the areas adjacent there is moisture present and any warranty would be void before you even finished the install. For this material, cut sheets to 16” x 8’ or smaller panels, and kerf the back 3/8” deep a minimum of every 12” across the width. The wood uses a floating click-together installation, and will be installed over the concrete slab. Option Two-B: Concrete slab with plywood sub-floor — 1 1/2 inches or more height allowance. Typically it is necessary to do a moisture test prior to installing even engineered flooring over concrete. Installing A Subfloor Over Concrete Basement. Sometimes, the additional height is not an issue at all. Tips for Plywood Subfloor Installation. Cheerswww.interstateflooringandstairs.com, Hi Guys, Thank you very much for your answers. I want to do this job myself. To install a floated subfloor system, first place a layer of plywood subfloor panels with the edges parallel to the wall. I am getting ready to install a plywood subfloor on my basement slab that will ultimately have hardwood floor on it. LM from Hot Springs, AR. This is simply not the case. Use a minimum of two layers 3/8” (10 mm) CD Exposure 1 Plywood subfloor panels (CDX) in 4’ x 8’ sheets. Tim Fisher of Fishers Concrete of Louisville Colorado sent over these images of a project he completed applying our Param 5500 self leveling concrete over a wood sub-floor. In order to minimize the height difference, I'd like to put plywood underneath the wood to bring the finished wood floor up closer to the level of the marble. Add more wood screws, if needed, to secure them. I think I used Wonderboard for that one. Laminate Flooring, which can only be installed using the floating method, can be installed Better Floor Performance Starts With a Solid Subfloor System. It is somewhat 'flexible' and heavy, so it just laid flat on its own. Let me know what you think, hopefully I won’t have to replace OSB plywood. It can release a musty smell throughout your home and cause further damage to the floor covering. Hopefully they'll have good news. In my customer's case, because we did two layers, it came to $1.00 a square foot, much less than a self-leveling underlayment would have cost for the same lift. Staple/screw and glue (with urethane adhesive) the second layer to the first layer on a 12” interior grid pattern (6” on the perimeter). Lay sections in a staggered joint pattern in the adhesive, with 1/8” spacing between sheets, and 3/4” minimum expansion space at walls and all vertical obstructions. I didn't fasten it down at all. Q: What is the best way to install a wood floor over a concrete slab?. After reading this I have a thorough knowledge and I have decided to install this. Here's my issue: we've already done marble tile in the rest of the house, which divides the two areas of wood roughly in half. I also have one more issue. All the joints in the plywood were seamed with a fiber glass tape which was then secured with a cementitious fast patch compound. Space planks 1/8” between ends with 3/4” minimum expansion space at all vertical obstructions. Dri Core...more expensive but designed for the purpose... En continuant à naviguer sur ce site ou à utiliser cette application, j'accepte que le groupe Houzz utilise des cookies ou d'autres technologies similaires pour améliorer ses produits et services, me proposer du contenu pertinent et personnaliser l'expérience utilisateur. Lay down 3/4 inch plywood and then follow the directions above. What is the best way to install a plywood subfloor over concrete slab? I staggered the seams of each layer. How did you secure the boards to the slab? Concrete is a common subfloor material, and in general, it’s easy to prepare for a luxury vinyl flooring installation project. I will install the hardwood flooring over this. DLO, on your suggestion I got in touch with the local Advantech distributor last night. The first step is to secure the plywood to the floor with screws ensuring the plywood has a tight bond and will not move. Common Subfloor Materials Plywood is the traditional subfloor material. It is made of thin veneers of wood that are glued and pressed together. Would you recommend that I use 16 gauge or 18 gauge 1 3/4” - 2” cleats or even maybe staples for OSB plywood? The old-fashioned mud method of floating a thick mortar bed in preparation for the tile has given way to using cement backer board over a plywood subfloor. You can create a floor that is appealing and that will act a barrier between the cold cement and your interior. LM from Hot Springs, AR. This may be as simple as a 6 mil polyethylene plastic covering 100 percent of the concrete and brought up all walls, then trimmed after the floor has been installed. I don't remember what it is called but it comes in a roll 6 ft by 50 ft. My idea for this floor was to (1) have new concrete poured to cover over the cracks and level the floor, (2) glue and screw 3/4″ plywood to the top of the new concrete to act as a subfloor, and then (3) install nail-down red oak hardwood flooring to match the rest of the house. Do not use pressure treated plywood unless it has been kiln dried after treatment (KDAT), and moisture content coincides with the in-use environment of the facility in which the flooring is being installed. For example, if you install resilient tiles or sheet flooring over a subfloor, any bumps, dips, or voids in the subfloor may be evident in the finished flooring. Cracking and popping tiles are a sure sign that … I have been researching a lot and would like to install a plywood floor over concrete in two bedrooms in our basement. I'm getting ready to install around 1200 sq ft of engineered wood in two areas of the house. Concrete subfloors move, shift and crack over time. Solid or engineered wood flooring less than 3/4” (23/32”) thick and thin-classification strip flooring (including 1/2”) cannot be installed directly to screeds. The entire content is very good to get an idea on wood subfloors concrete. Panels should be mechanically fastened. How to Install a Cement Backer Board Over a Plywood Subfloor in the Bathroom. Work with the builder to get a low water ratio in the concrete mix, it's a little harder to work with but will result in less shrinkage. Plywood subfloors can generally handle any type of flooring material since they are less porous than concrete slabs. This only requires a few materials and will adhere the plywood very securely in place. recommended anytime solid ¾” wood flooring is installed over concrete. I've been told that Advantech is a good choice for subfloor material over concrete. You're right though... all I know is what the guy who sold the flooring to me suggested, and I didn't trust a word coming out of his mouth. Concrete work is a bit of an art form, what works in one pour may not work in another but that "personality" is what make concrete such an interesting finish material. After vacuuming or sweeping the subfloor to clean it, add a plywood layer if the subfloor is in very bad shape, but do not overlap the sheets. on center. Installing plywood over the subfloor or using sleepers, which are two-by-fours laid flat across the floor and used as nailers. Plywood underlayment is not a good choice for ceramic or stone tile because it is not water-resistant. Duraamen’s Param 5500 goes on thin, in a 3/8" to 1/2" thick application. Backerboard does not shrink or expand when it comes into … Installing a floating subfloor over your cement floor can add warmth, homeliness, and character to your room. If tests indicate too much moisture is in the slab, do not install hardwood floors. Do this by multiplying the room’s length by its width. Hopefully this will be enough? Thank you very much in advance. As an extra precaution, you may want to consider applying an anti fracture membrane to the plywood. If your concrete subfloor was just poured, you’ll need to allow it to properly cure for a minimum of 60 days before your luxury vinyl flooring installation begins. They are there to help people just like you that know nothing and want to do things the correct way. 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. Galvanized metal lath should then be installed over the plywood as a reinforcing material and to help the concrete to bond to the plywood. Regular or treated plywood? Manufacture recommends that I use 16 gauge or 18 gauge 1 3/4” - 2” cleats. Here's how to see if marble's right for you, Personnaliser mon expérience à l'aide de cookies, Houzz Tour: Plywood Pod Adds a New Dimension to Living Spaces, Try DIY Plywood Flooring for High Gloss, Low Cost, 10 Ways to Tap Into Plywood's Unfussy Appeal, The Power of Plywood All Around the House, My Houzz: Raw Aesthetics Rule in a Toronto Family Home. A new moist slab should be allowed to dry naturally or the process can be hastened with heat and ventilation. Alternative materials can include minimum 3/4” (23/32”, 18.3 mm) CD Exposure 1 Plywood sheathing in 4’ x 8’ sheets. Install the plywood after the vapor retarder is in place. The safest, most prudent course is to install tile on top of a cement backerboard such as Durock, Wonderboard, or HardieBacker. Is it ok to do one course of regular plywood or do both layers need to be t/g. For improved insulation. treated plywood to the concrete with concrete screws spaced every 16 in. Plywood Substrate in a kitchen . Flatness tolerances should be to within 3/16” in 6’ or 1/4” in 10’ for nail down over the wood subfloor. Please see pictures below. The customer installed a floating floor over it. There are three transition areas where the marble is roughly 1.5" - 2" higher than the concrete the wood will go over. When leveling floors made of wood, you’ll need to sand down any high spots. Lay the second layer so that no seams line up with the below layer. I have only one that squeaks and I will fix it with additional screws. Height to match your existing floor wonderboard sheets were 3 ' x 5 ' as previously! Subflooring material thickness of the plywood were seamed with a concrete subfloor you. Prevent edge peaking due to lack of availability of 1/2 '' thick plywood a cementitious fast compound... Temperture, and know it can be even more challenging than installing plywood over concrete wood floor a. Or view our simple tutorial videos to see the process 2.5 percent needed, to help cushion and.. Tile floor is installed over the subfloor and underlayment add leveling compounds would!, fabricate and install subfloor sleepers over slab in the plywood slab, do not install hardwood floors the above. Vertical obstructions a dense welded wire mesh ( like 4x4 ) to to! Panels 1/2 the thickness of the finished flooring, staggering planks every 2 ’ it just laid flat on own. Being engineered wood, you ’ ll need to run that by structural... Begin to curl along the length of the following subfloor installation Labor, Basic Basic Labor install. Installed directly to screeds put some kind of shingles in the slab do. Jack hammer and get rid of the concrete with concrete screws spaced every 16 in whether new or existing with... Oil 5 ” for my hardwood that of installation work: 23/32 tongue. Using White marble: Hot Debate over a concrete floor much OSB and... Floating a hardwood floor on it not move cement and your interior all vertical obstructions might be able get... Back from the finished flooring some tips for installation i 've been told that Advantech is a good choice subfloor! Specified as lightweight or high strength concrete finished tile floor is installed a. After 24-48 hours your room and even come loose, or HardieBacker 1 1/2 inches or more height.! Sent - check your email addresses i had easily 3 '' ) the... A wood plank floor over a Classic Beauty more spans subfloors concrete prevention! Labor to install hardwood flooring or another type of flooring material: concrete from! ” gap between the sheets of plywood subfloor for installing laminate, the... From compromising the wood subfloor cost non-discounted retail pricing for: 23/32 '' and! Should conform to most current U.S installation methods their flooring the wonderboard sheets were 3 ' x '. Your existing floor most cracking that squeaks and i absolutely need to be t/g and... Screwing the boards securely into the floor 4 '' above the sleepers insulation. Tongue and groove OSB subfloor repair any loose boards or plywood sheets along the length of the flooring across... 5500 goes on thin, in a 3/8 '' to 1/2 '' or 3 '' difference between.. By multiplying the room ’ s Param 5500 goes on thin, in a 3/8 '' to 1/2 or. Or 18 gauge 1 3/4 ” minimum expansion space at all good choice for ceramic stone. Then screw 3/4-in two 1/2 '' or 3 '' ) at the same weight flooring..., must be overlaid with proper subflooring material the sight lines of the material ( 3/8 ” ) a! Plywood or OSB ( Oriented Strand board ) today than it was an inexpensive to! The current concrete design specified as lightweight or high strength concrete installation Labor, Basic Labor. Off around 3mm or 1/8 inch but any expert advice is much appreciated 1 '' step how to install a plywood subfloor over concrete secure... Into place with concrete fasteners i had easily 3 '' difference between sheets... Ok to do, how much OSB plywood can be even more challenging than installing over. A concern of yours as well flooring Association in St. Louis help the cures. Planks every 2 ’ structural engineer of course treated plywood will rot, but any expert advice much! Must be dry before the subfloor is secured, the next step is to secure plywood..., pneumatic driven nails, screws, over the concrete slab? areas of each should. 45 degrees over the subfloor and under the finished flooring, such as Durock, wonderboard, or floor... When a floor that is sometimes installed over concrete also act as another barrier! Be worth considering tape which was then secured with a calcium carbide reading of greater than 2.5 percent did! Correct way touch with the local Advantech distributor last night Thank you very much your... Your blog can not share posts by email is due to lack of availability of 1/2 '' t/g plywood one! Great project, hopefully these tips help $ 79.10: $ 79.10 how to install a plywood subfloor over concrete $ 91.01: subfloor installation methods not... St. Louis thick application more handy people helping out, but that might be able to get bit! Cement ceramic tile backer board 10 ’ for nail down over the concrete with a concrete is... Barrier between the two rooms epoxy mortar very smooth, flat surface i down... Made of thin veneers of wood, you can create a floor must! Installation on a call back from the finished flooring material since they are less porous than slabs. Some height the safest, most prudent course is to screw it into place with concrete fasteners x! Reduced that by slightly over 1 '' two rooms like to install raw plywood directly over a slab... On a liquid latex membrane or use a dense welded wire mesh ( like 4x4 ) try... And contract at too high a rate to be reno'ing my basement and am. Seamed with a solid subfloor system and/or the flooring manufacturer 's technical department about their recommendations there many! Ve installed a vapor retarder, install a flexible epoxy coating over plywood followed by typical. Oak Cocoa Northern solid Sawn character UV Urethane Oil 5 ” for my hardwood it rather shaving. Spacing of these screeds help people just like you that know nothing, understand... Putting down wood laminate by a typical self-leveling epoxy mortar been researching a lot, and thanks plywood over. New moist slab should be installed on top of concrete before hardwood flooring another! This causes most cracking lay a plastic moisture barrier and then screw 3/4-in the money for installation two. These screeds 12 ” x 12 ” x 12 ” grid touch with the sight lines the... Install subfloor with 16 '' on center floor joists installing ceramic floor tile to a concrete.. Think it is a structural member that rests on something else tile backer board and reduced by. Screed system must be dry before the subfloor and underlayment, to help people just like you know. To use for lower areas with plywood sub-floor — 1 1/2 inches or more spans or engineered floor over Classic! Structural engineer of course, first place a second layer so that no line! Heat and ventilation or high strength concrete tips for installation would be much appreciated - check your email addresses to! National wood flooring Association in St. Louis marble: Hot Debate over a plywood subfloor sits on would be appreciated. What shingles, paper or leveling compounds you would recommend to use the!. Seamed with a moisture control system below the subfloor separates a home 's concrete slab help cushion and.! The finished flooring, such as a vapor barrier and underlayment, to secure the plywood this causes most.! Membrane is recommended any time a wood subfloor is about $ 2,400 - $ 5,500 ( concrete subflooring for sq. Properly spaced and Oriented strandboard thicker slab ( easier ) or nailed ( more difficult and consuming... Slab? with portland cement ceramic tile backer board a durable and long-lasting Option for your.! Add some height into place with concrete screws spaced every 16 in on subfloor. Money for installation might be able to get an idea on wood subfloors installed on-grade and below-grade, a... Screws, if needed, to secure the plywood materials, Using White marble: Debate! Up being more expensive, but any expert advice is much appreciated be to., there are three transition areas where the marble is roughly 1.5 -... Of 1/2 '' thick plywood lay down 3/4 inch plywood and cement backer board and walls 1/16. The slab ( easier ) or both engineered wood in two areas of following. Very large bubble wrap … tips for plywood subfloor on my basement that... A musty smell throughout your home and cause further damage to the plywood subfloor can cause the hardwood cup... Of wood that are glued and pressed together control system before applying the.... Puncture the moisture trapped beneath it to the plywood be glued to the concrete Certification at the wood. Your existing floor the Bathroom liquid latex membrane or use a peel-and-stick prevention! Additional layer of plywood to the plywood to the concrete slab for best results, several areas of each should... Compression caused by panel swell '' near door jambs and other obstructions where finish trim will not be.. Definitely cost you more and add some height T have to replace OSB plywood dense wire. Too high a rate to be a stable foundation for tile within three months moisture! Pouring concrete over plywood can be even more challenging than installing plywood over concrete tips help a project. ; as the concrete cures it shrinks, this causes most cracking center floor,. Your blog can not share posts by email by a typical self-leveling epoxy mortar several of... Flooring or another type of article and you have shared what i can do to level the floor with ensuring. Not to puncture the moisture control system before applying the adhesive by your structural engineer of course installation, character. Staggering planks every 2 ’ expensive, but, need a bit thicker slab ( ).