It's ok to put a layer of thinset between the OSB and backer board. The Subfloor Is the Foundation of a Good Flooring Installation. One solution is to nail cement backer board CBUs over the drywall, tape the seams, and then grout over the cement backer board. Bekijk ons assortiment OSB platen, onze OSB aanbiedingen en bestel je OSB plaat online! Also consider your floor joist width and span. For floor, use 1/4” cement board - you’ll find that in the flooring section of the store. Mold, mildew, and rot result. If you hire a tile professional, you may find that he or she resists installing ceramic tile over sheet vinyl, for example, or has other preferred methods. The Strength of Portland Cement Professional installation can be quite expensive since this is a time-consuming method and good installers are rare and in high demand. Cement board (a sheet of lightweight concrete and fiberglass mesh) should be laid over top of the subfloor for any tile project. What Is Greenboard Water Resistant Drywall? Cement backer board is often used as a tile base on plywood or OSB subfloor. I've seen/read others indicate that it is appropriate to use unmodified/non-modified thin-set mortar between an OSB subfloor and 1/4" Durock cement board, while others indicate that they opt to use the same polymer-modified thin-set mortar that they use for their floor tiles. 13. Plywood manufactured with a fully waterproof adhesive, and with an Tile backer board now comes in all different types from cement to specialized gypsium-core products that are faced with fiberglass. Any help appreciated So I think I have two options. All the walls of a home can be constructed with OSBs. When it was introduced, cement-based backer board, along with thin-set mortar adhesives, largely revolutionized the ceramic tile business, since it made it possible for almost anyone to install a structurally solid base for ceramic tile. Introduced around 1970, cement-based backer board and thin-set adhesives not only made professional installation quicker (and therefore cheaper), but it also made it possible for everyday DIYers to install high-quality ceramic tile jobs. Manufactured veneer stone is another use for cement backer board. There is one school of thought that believes that if the vinyl tile is a full-bond installation (not peel-and-stick) and is in good shape, then ceramic tile can be laid over it under the same conditions as for full-bond sheet vinyl. When installing tile over sheet vinyl, make sure to use a specialty thin-set adhesive that is formulated to bond to vinyl. Cement particle boards or render boards are normally fitted on timber frame builds and then the rendering is normally carried out over the board. The span is 14ft each side of the supported centerline. Try that with tile over cement board and see what happens. This finished tile floor is installed over a plywood and cement backer board subfloor. Cement backer board is commonly used to form a base for ceramic tile. OSB panels provide an excellent base for many types of finished flooring including ceramic tiles if careful attention to the construction and preparation of the subfloor is paid in order to avoid costly callbacks. ORIENTED STRAND BOARD (OSB) TB12 Wood-based panels like Oriented Strand Board (OSB) expands and contracts with changes in moisture content. Not every floor has all three components. Mortar bed installation is therefore somewhat rare today, and you may not encounter it at all unless you happen to be demolishing a floor that was installed with this method. ). Available from Buildbase in bulk bags & polybags for Trade & DIY customers. The main level subfloor joists are older 2x10 solid lumber @ 16"oc with new 3/4 T&G OSB cover. Using OSB Board. Can Cement Board Tile-Backer Be Installed Over Concrete? Wood is not an acceptable material to use for places with constant water usage such as showers and bathtubs. Put very thin (5mm) plywood backerboard over the OSB. It is made of cement, water, silica, limestone flour, and fibers such as Kevlar or fiberglass for increased strength. Other professionals, though, feel that the many seams in a vinyl tile installation make it a poor choice as an underlayment. There are several choices one has when choosing a texture with which to mask an OSB. Instead of workers floating massive beds of mortar on the job site, mortar beds are created in a factory and milled into thin standardized sizes. It is made of cement, water, silica, limestone flour, and fibers such as Kevlar or fiberglass for increased strength. Regular drywall is not appropriate. I've read a lot of conflicting articles whether to use OSB or not under cement board (and then tiling over it). An extra layer of ceramic tile adds substantial thickness to the flooring layer. Cement backer board was developed first to replace the cement mud and metal lath systems installed by real craftsmen. Installing either sheathing over a 500 square foot area would cost roughly $160 in material for plywood and $100 for OSB. One advantage of this method is that it allows the installer to accommodate small flaws and unevenness in the subfloor. But it is possible to install tile over plywood, and in fact, this was a very common method prior to the invention of cement board. In fact, it is one of the very best underlayments, since it closely resembles the solid mortar bases that were once the norm for ceramic tile installations. Either install 1/2-3/4" t&g ply over it (glued & nailed), or cut it out and install new t&g 3/4 subfloor, glued and nailed. Once this happens, the studs can begin to dampen. Maximum installed weight of the finish system should not exceed 15 psf. Cover and mortar the seams with fiberglass seam tape. Most importantly, cement backer board contributes to a longer-lasting, more durable tile installation, with no chance of backing board rot and a reduced chance of rot with the underlying wall studs or floor joists. Unlike wood-based materials such as plywood or products that contain some wood such as drywall, cement board lacks organic matter, making it resistant to mold, rot, shrinkage, or decomposition. Fasten minimum 3/4" APA span-rated plywood or OSB with an Exposure 1 classification or better across cabinet supports. Boards can be easily cut with a hand saw, circular saw, jigsaw, or multi-tool. A subfloor system that worked fine for a single layer of ceramic tile may not be strong enough to handle the many hundreds of extra pounds added when a second layer is added. HardieBacker Cement Board is a backerboard for tile and stone, used as an alternative for plasterboard for tiling floors, bathrooms/wet rooms and … Planning and patience along with these tips will help ensure that you install the quality of finished flooring you are looking for. Cement backer board is an inexpensive, convenient building material that makes tiling, flooring, and countertop projects go faster and look better in the end. It is important for seams not to overlap between layers, and it's generally recommended that the screws attaching the top underlayment not go all the way down into the floor joists since some degree of lateral movement needs to be allowed. Such opinions have some credence since these trade organizations are devoted to making sure that professionals have few callbacks for installation failure. If water seeps through the tile installation to the underlayment, it will not cause the wood to swell, as happens with interior-grade plywood. Position ends and edges over supports. I feel really stupid for not knowing about cement board beforehand. Ceramic and porcelain tiles are paradoxically very strong and at the same time somewhat delicate. In this question, that's undetermined. DO NOT install tile directly over OSB (that's what the thinset manufacturers are referring to). Difference in elevation between bathroom and hallway or bedroom can be handled with transition thresholds. Echter, iedere ondergrond heeft weer een andere voorbehandeling nodig afhankelijk van de (staat van de) ondergrond (gipsplaten, houtvezelplaten, OSB of OGB platen, behang, geverfde steens muur etc. Two layers of ceramic tile will be quite heavy and can be more than the underlying joists and subfloor can adequately handle. cal and physical properties of oriented strand board (OSB) using cement as binder. Aggregates Sand & Cement. Durock: Subfloor should be minimum 5/8" exterior-grade OSB or plywood. Tile Council of North America, Inc. 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. In most cases, you can apply tile directly to … Some materials should be avoided as underlayments for ceramic tile: Tiling Over Vinyl - Some Helpful Hints. Do-it-yourselfers can use either 1/2- or 1/4-inch cement board in certain applications while other scenarios mandate 1/2-inch board. How to Repair Water-Damaged Tile Shower Walls, Lath and Plaster Walls: Basics, Construction, and Repairs, Tile Backer Board: What to Know Before You Buy, Drywall Screws: What to Know Before You Buy. Plan is to use the thinset under the cement board, screw it down, and put thinset on the cement board. cement board screws spaced every 4 in. For years, interior walls were finished with wood strips (lath) laid over wall studs. Exterior plywood is an acceptable underlayment for tile and is preferred to interior-grade plywoods because the bonding adhesives used are waterproof. OSB (Oriented Stranded Board, also known as sterling board) is, as you know, ... plywood has been developed into different types over the years in different ways to be used for different purposes. Cement backer board is mainly used as a sub-surface for tiling. De meeste ondergronden kun je laten stucen. Ceramic Tile Comparison Guide, Hardwood Flooring in Kitchens Review: Pros and Cons. Just as you would with drywall, make sure the screwheads are slightly depressed below the. Cement backer board is a mineral-based pre-fabricated wall unit, usually 1/4-inch or 1/2-inch thick and 3 feet by 5 feet long. Trade organizations that serve the professional installation audience may argue that removal of the existing underlayment and installation of new cement-based backer board is the only method that truly guarantees a trouble-free ceramic tile job. Whatever it is called, cement-based backer board is what the name suggests: a layer of cementitious material faced with fiberglass mesh to hold it together. The Spruce uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Oriented Strand Boards (OSBs) have become a popular and cost-effective building material. Cement backer board is often used as a tile base on plywood or OSB subfloor. 9mm Magply Euroclass A1 Non-Combustible board provides an environmentally friendly and fire-safe alternative to regular plywood, OSB or wood. Mortar beds are still commonly used when installing ceramic tile bases in showers, however. Buildbase supply high quality aggregates, sand and cement in polybags for small DIY or self-build projects right up to … An uncoupling membrane disconnects tile from its concrete subfloor and prevents cracking in the slab from being transmitted upward to the tile job. But to perform adequately they depend on an underlying flooring structure that is also sturdy and rigid. Cement board & OSB for auction. Cement board is an easily installed DIY tile underlayment providing a stable, dependable tile-setting substrate while eliminating the complicated lath-and-mortar "floating" process. HardieBacker board is not designed for use over concrete. Overly glossy, or cushioned vinyl flooring does not work very well as an underlayment for ceramic tile. Now largely regarded as the very best underlayment for ceramic tile in any application—floors, walls, and countertops—cement-based backer board goes by many names. Cement board over top, or rip out what I had just finished and put cement board directly over the plywood subfloor? Typically 8" along the edges and 12" in the field. Cement backer board on concrete as a subfloor or underlayment is usually not recommended or needed. Mortar bed installation requires considerable skill and time, and it is beyond the level of most DIYers. Cement backer board is often used as a tile base on plywood or OSB subfloor. Adhering the cement board to plywood only works if the plywood is re-scuffed or sanded first with a 20 grit disc sandpaper and you use a minimum 3/8″ trowel for the thinset. 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 the underlying flooring structure—which usually consists of floor joists, a subfloor, and an underlayment—is not in good shape, the ceramic tile floor will flex underfoot, leading to cracked grout joints and a ruined installation. According to the Tile Council of North America (TCNA), this is regularly done and is perfectly acceptable, provided certain conditions are met. 22mm osb (already in place)..now have to fix the cement backer-board to it before tiling. Tape the seams Lay cement board fiberglass mesh tape over all the seams (it’s sticky on one side). AsktheBuilder.com: Backer board is a term used to describe a drywall-like product that goes behind ceramic tile. Cement-Based Backer Board . Gun nails would not work over XPS foam. It was found that an increase of cement-wood ratio resulted in an increase of all, but MOR values. In sharp contrast, cement backer board does not rot, warp, grow mold, or deteriorate when subjected to water. All of that plaster and the structural qualities of the lath were pressed and dried ahead of time in a factory, in the form of sheets called Sackett Wall Board. Also called a cementitious backer unit or CBU. My experience is no, too much bounce. Thickness: 6mm, 8mm, 12mm, 18mm, 21mm. … I went back to Lowe’s and picked up DUROCK cement backer board instead, plus thinset, the proper screws, and alkali-resistant fiberglass mesh tape. While many industry sources, such as the TCNA, approve of these six underlayment options for ceramic tile, not all contractors or industry organizations agree. Tearing out an old ceramic tile installation is difficult, messy, and back-breaking work, so it is very tempting to consider laying the new tile directly over the old. If it does not lift up, it is full contact vinyl. You can apply virtually any type of topcoat on OSB, but it is best to start with a primer that will block the transfer … If so, it's a good idea to abide by his or her recommendations. Introducing "One Thing": A New Video Series. Previously, ceramic tile floors were generally installed on a wet-mortar base layer laid by a skilled professional. The underlying tile must be in good shape and firmly attached, and the surfaces of the tile must be scuffed and scarified so that the thin-set adhesive used to install the new layer can bond firmly. Once very common, mortar bed installations involve pouring a thin layer of cement mortar and embedding the ceramic tile directly into it. However, covering this roughly paneled wood with a textured veneer is probably desirable to most home-constructors. Choose this high-performance alternative to fiber-cement boards or bare plywood surfaces for: Superior Tile Bond Prevents tile pops and grout cracks, up to 40% greater tile bond than fiber-cement board. To get the wind rating we wanted on 24" centers, we had to use 3 ¼" galvy nails with a large diameter head. The 24" oc joist with 1/2" wonderboard is the only one requiring plywood as opposed to osb. It is commonly sold in 1/4- or 1/2-inch-thick sheets, that are three-by-five feet or four-by-eight feet in size. For this reason, ceramic and porcelain tile floors can be considered somewhat delicate, despite the inherent strength of the material. Plywood Except for slab floors, any flooring system consists of three primary components: the joists or structural support component; the subfloor, which is usually a layer of OSB (oriented strand board) or plywood; and the underlayment, a final layer that lies just beneath the surface flooring and which is selected to match the needs of the flooring material. SKU: 1237973# Category: Plywood. Depth: 9 mm Length: 2400 mm Width: 1200 mm Weight: 16.10 kg Moisture Resistant: No Interior or Exterior Use: Interior/Exterior Structural: Structural Colour: Brown Application: Flooring-Formwork,General Construction & Renovation Work,Roofing,Wall Sheathing Type: OSB3 Sheets Certifications Met: BBA-BS 5268-EN 300-Euro code 5 Pack Quantity: 1 Brand Name: Wickes After pressing the boards into the mortar, screw them in with screws made especially for cement backer board installation. Due to cement board's strengthening additives, these sheets are far stronger and more dimensionally stable than site-built mortar beds. Further, you should keep in mind two important issues: Ceramic tile can also be installed directly over existing sheet vinyl flooring, but only if certain conditions are met. Board is secured and has minimal if no deflection. I already have 1/4" cement board and versabond thinset. It is important to distinguish the components of a flooring system in order to understand the best installation practices for ceramic tile. Out with the OSB. In any flooring installation, but for ceramic tile in particular, the success of the flooring depends largely on the quality of the underlying support system. We just did a tear out of a two story home 6-months old. PermaBASE UltraBacker® Cement Board features a smooth mesh and mat surface that creates a more rigid and easier to handle product and an improved surface providing superior tile bond. Did I … The total cost for installing 500 square feet is roughly $650 for plywood and $590 for OSB. It is generically called cement-board or backer board, or it can also be referred to by one of the common brand names, such as DensShield, Hardiebacker, and WonderBoard. Oriented Strand Board (OSB) Oriented Strand Board (OSB) Thickness: Clear: Oriented Strand Board (OSB) quantity. OSB performance categories in 4' x 8', 4' x 9' and 4' x 10' lengths •Struct-1 grade is available •Coating adds approximately 0.6 lbs per square foot to a board •panel treated on one side = 66lbs •panel treated on both sides = 85lbs •4' x 8' x 5/8" gypsum board (80 lbs) plus a 4' x 8', 15/32 wood sheathing panel = over 120lbs We've ripped out the plank sub-floor in my kitchen (they were really uneven and rotting) and want to replace with 23/32" OSB plywood. Installation costs for both would be $490, assuming that the carpenter can install approximately 75 feet of material per hour. Many professional installers even recommend against using water- or mold-resistant drywall in high-moisture areas. Available under the brand names Schluter Ditra or Redgard Uncoupling Mat, this product is also known as anti-fracture membrane, crack isolation membrane, or crack suppression membrane. There are six subfloor/underlayment structures that are widely accepted for ceramic tile floors. In either case, then you can install 1/2" cement board. While using 1/4” thick—rather than 1/2” thick—cement backer board is acceptable, how you install the backer board and attach it to the plywood subfloor is as important as how you lay the tile on top of it. It is generically called cement-board or backer board, or it can also be referred to by one of the common brand names, such as DensShield, Hardiebacker, and WonderBoard. It can also require that doors be trimmed and trim moldings reinstalled to accommodate the height changes. The TCNA gives the following requirements for using vinyl flooring as an underlayment for ceramic tile:. To test if your vinyl floor has been installed with full-contact adhesive, use a utility knife to cut a small slice at the center of the floor. Board Size: 2440mm x 1220mm. In most cases, you can apply tile directly to … It is my experience that subfloor should be oriented strand board (OSB). Wil je OSB platen kopen? Tile over osb subfloor floor. They also have a proprietary 1/2" wonderboard over 3/4" t-g exterior plywood subfloor where joists are 24" oc. Can I just seal the OSB and proceed with tiling? It was invented by Armin Elmendorf in California in 1963. However there are a number of problems that could arise with cement particle boards if not fitted properly or if the incorrect render system is applied over it. Cement over OSB Board 11-03-2001, 07:39 AM. Not only that, drywall is not a strong enough material to support veneer stone's considerable weight. A lower cement-wood ratio than for particleboards is required in order to manufacture acceptable OSB and this may be due to the strands geometry. Therefore, according to the 2012 TCNA Handbook, they are not recommended as a substrate material for direct bonding of ceramic or natural stone tile with cement mortars. If you have any obstructions to work around, before laying down the boards cut the cement backer board with a jigsaw fitted with a carbide blade. The layer of mortar usually has a wire mesh reinforcement embedded in it. Wonderboard: For the subfloor, securely glue and fasten minimum 5/8" (16 mm) exterior grade plywood or OSB panels (PRP-108) to the floor joists. Read our, The Subfloor Is the Foundation of a Good Flooring Installation, Inexpensive Options for Flooring in Basements, How to Prepare a Vinyl or Linoleum Floor for Ceramic Tile. Now largely regarded as the very best underlayment for ceramic tile in any application—floors, walls, and countertops—cement-based backer board goes by many names. We finished the other half of the kitchen/dining room with wood planks that sit 3/4" above the subfloor. 4. Most significant, though, is the reduction of on-site drying time, as cement backer board is dried in the factory. It is ideally suited as an underlayment for ceramic tile on floors, countertops, tub decks, and outdoor kitchen counters. Hi, We are building a new construction 2 story home over an existing walkout basement. Plasterers then troweled on plaster and waited weeks for it to fully dry. To reduce the possibility of cracking, an intervening material called an uncoupling membrane can be used. Cement backer board on concrete as a subfloor or underlayment is usually not recommended or needed. Get daily tips and tricks for making your best home. 1 Introduction The goal of any contractor is to avoid callbacks for failure, so if he or she recommends a certain method, it's probably for a good reason. Ideally I would hope to not go over 3/4" with the finished kitchen floor. Opinions differ on whether or not ceramic tile can be laid over vinyl composite tiles. However I've read that I should not put thinset over OSB directly because it can suck the moisture. The backer board should be screwed down according to the manufacturers specifications. These materials are very hard and durable, and when installed correctly they form extremely rigid and long-lasting floors that can last for many decades. We blind and hand-nailed our Hardi over 1" XPS foam, into OSB/Stud. It is important, though, for the underlying slab to be perfectly flat and level, and for it to be stable and not prone to settling or heaving. Veneer stone cannot be applied directly to drywall or other materials that will draw in moisture from the mortar. Cement backer board is a mineral-based pre-fabricated wall unit, usually 1/4-inch or 1/2-inch thick and 3 feet by 5 feet long. In a home with a concrete slab foundation, or in basements, ceramic tile is often installed directly over the concrete slab. In short, tile and grout are not inherently waterproof. When used as an underlayment, the plywood sheets are laid over the OSB or plywood subfloor, for a two-layer base. What Is Cement Backer Board and How Is It Used? But, you cannot bond tile to osb because the resins used to make osb will not allow the thinset to remain bonded for very long. If that’s the case, unfortunately, there’s no quick fix for this problem other than removing the tile and cement backer board and starting over. 11. Additional information Additional information. The home had a water leak and the insurance company has us tear out the floor. PERMACOLOR Select is an advanced high performance cement grout that offers the industry’s first dispensable dry pigment solution. ... (e.g. Too much variance in backing pressure - no amount of air pressure adjusting would solve it - either too far in, too far out, or both. USG Durock ® cement board is an outstanding backerboard for a wide variety of reasons. Do not use USG Durock® cement board with vinyl flooring. Use the blade tip or sharp screwdriver to try to lift up the vinyl. To me, they ruined the industry with all the “latest and greatest” fad products. A concrete slab is also a good ceramic tile underlayment. The upper floor was 3/4" OSB board nailed and glue to floor joists with 1/2" of cement poured on top. Staple film over the plywood base. In most cases, you can apply tile directly to the concrete. This can be a good solution, provided the extra thickness does not create difficulty. Cement board can go on top. However if you cant remove the old surface or otherwise decide to install over it lay a backer board with thin set over the old surface to serve as your new subfloor material. USG Durock® cement board is not designed for use as a structural panel. 10. Add to quote. The backer-board is a make called Mineret..it's what my builder's merchant stocks..its a cement-fiber board but I can't find anything on t he net about it! Vinyl Tile vs. This is a heavy material, so the smaller sheets are somewhat easier to install, especially for DIYers. Add to basket. Cement backer board is mainly used as a sub-surface for tiling. And you need to be careful not to tile over expansion joints in the underlying slab, which will cause the tile job to fracture. In 1916, United States Gypsum developed the idea of doing all of that drying in a factory, thus the name drywall. 14. A mortar bed also adds considerable weight to the floor. Cab anyone advise if it is acceptable to tile directly onto OSB board for wall tiles. Cement Board 9mm Magply Euroclass A1 Non-Combustible Board 2400mm x 1200mm (8′ x 4′) Magply fired rated board 9mm is a technically advanced, multi-functional board, which contains Magnesium Oxide formulation as the main component. One common option with existing vinyl flooring of either kind is to apply a layer of 1/4-inch-thick cement backer board over the vinyl as a secondary underlayment. Oriented strand board (OSB) is a type of engineered wood similar to particle board, formed by adding adhesives and then compressing layers of wood strands (flakes) in specific orientations. USG Durock® cement board panels should not be used in areas where they are exposed to temperatures that exceed 200°F. Introducing "One Thing": A New Video Series. Embed the cement board and screw it to the underlayment with special 1-1/4 in. Get daily tips and tricks for making your best home. MOT Type 1 is a base material used on roads, patios, driveways or artificial grass. It is important to note that this is no longer a preferred method of installation by professionals, almost all of whom will install ceramic tile over cement-based backer board. Ceramic or porcelain tile, with its seams and numerous avenues for moisture infiltration, can eventually lead to its base material contacting with water. Think of cement backer board as a tile-appropriate equivalent of wallboard. Cement backer board on concrete as a subfloor or underlayment is usually not recommended or needed. De OSB plaat wordt bij jou thuis afgeleverd. 12. Because cement backer board is porous, thinset, grout, and mortar adhere well to it. To understand the value of cement backer board, consider another pre-fabricated wall unit: drywall.