- Cement board subfloor g. Durock needs thinset for various reasons, which include; • To create a strong bond between it and the substrate. Note: Because cement board fasteners may protrude through the plywood base when 1/4" cement board is used, 1/2" or 5/8" cement board is preferred in this Often used as a subfloor material for tile installations, cement boards provide a stable, water-resistant base that helps protect the floor against moisture. This provides a stable, bondable surface for the tile. Cement board requires special screws with corrosion-resistant coating to ensure that it remains 3 days ago · The use of cement board between the subfloor and the tile will allow the tile to be securely and properly applied and will provide an additional layer of protection for the subfloor. Feb 27, 2025 · A. floor joists, 5/8” tongue-and-groove exterior-grade plywood or 3/4” tongue-and-groove exterior-grade OSB may be used. Oct 8, 2024 · Installing Cement Backer Board. 1/4" plywood has a nasty habit of delaminating (the layers come apart). I believe for the 16″ joist spacing involved, 3/4″ plywood subfloor is sufficient structurally for the room, so adding 1/2″ plywood over the 3/4″ plywood instead of the 1/2″ cement board under the tub is also not necessary structurally, and to oh’mike’s comment, However, particle board is susceptible to moisture damage and may swell or deteriorate if exposed to water. Some finish materials may require a more rigid subassembly (such as large format tile and natural stone products). Any findings should be remedied to prevent future damage to the overlying material. Made from cement and reinforcing fibers Even worse, cement boards aren’t completely waterproof, so some moisture may still pass through the subfloor. It is best if you use a mixing paddle to do so but it can be mixed by hand using a small trowel. 42-inch-thick HardieBacker 500 versions and is designed to add mold and moisture resistance to tile installations. A big carpenter’s square was extra handy to get a straight line across the board. Jun 3, 2019 · N/mm2, a minimum cement content of 200 kg/m3 and a maximum water cement ratio of 0. Additionally, steps must be taken to ensure that a concrete floor will create a solid bond. As with a wooden subfloor, a concrete subfloor must be level for successful tile installation. Sweep the floor. com. ) 2) Install the cement board all the way under the shower, then install the base, then run the floor tile right up to the base. FINISH Install tile. However, a homeowner may need to raise the floor slightly before installing tile and lack the experience or time to install a mortar bed. • Embed HardieBacker cement board firmly and evenly in the wet mortar. 6 yrs CN . This means that tile applied Most homes will consist of a standard subfloor constructed of running boards laid over floor joists, a plywood layer over the running boards, or if on a first floor, the subfloor can be a concrete slab. I left a 1/2" gap between tiles and oak floor, into which I fitted some slightly beveled wood trim finished to match the floor. It would have added more weight to the floor, but more concerning was the additional height. Thinset is commonly used as a bonding material when installing cement board in areas where tile or other flooring will be added. Oct 17, 2023 · Step 3: Place the cement board onto the subfloor. plywood for floating subfloor, besides the price? And what about cement reinforced gypsum floor boards? My concerns are low freq absorbtion (room acoustics) as well as sound insulation. Apply a leveling bed of either Type 1 organic adhesive with 5/32" v-notched trowel; or latex fortified thinset mortar with 1/4" square-notched trowel. I always recommend cement board, also called cement backerboard or wonderboard, as the ideal subfloor material for vinyl installations. [CBU] Installing cement board underlayment is recommended to provide a flat, smooth and durable surface for tile installation and adhesion. matching floor heights between rooms), 1/4” cement Sep 20, 2024 · Here’s the right way to attach cement backer board to a plywood subfloor: Make sure the joists are wide enough for the span and spaced on 16” centers to provide a sturdy floor with no bounce. Its strength has been strengthened by special techniques, so it could be a substitute of heavy duty fiber cement board, to be applied as subfloor in container house, modular house, portable cabin etc. Plywood, OSB, cement board all similar Oct 14, 2024 · Cement backer boards can be cut with a utility knife and straightedge, which creates a straight cut with minimal dust. The MTH Underlayment screw is designed for fast and secure underlayment-to-subfloor installations. Whatever your subfloor is made of, The first step to installing cement backer board on a wooden subfloor is to determine how thick of a cement board you need. In any event, there are better (and also easier) ways to accomplish this. plywood or OSB must be Subfloor mgo board is a special customized type mgo board. Dec 20, 2023 · Secure the Board: Screw the backer board into the subfloor using special backer board screws. In these Jul 18, 2024 · I've got a small building where the client wants a structural steel perimeter frame (light w10's) with cold formed joist infill and cement board subfloor, something like structocrete by usg. It depends on how high you want to raise your floor. USG STRUCTO-CRETE® Brand Structural Panels are strong, reinforced concrete panels for use by builders in noncombustible construction. Clean the surface of the HardieBacker Cement Board with a damp sponge. Fiber cement floorboards can be a durable and moisture-resistant option for certain applications, such Mar 12, 2024 · For a concrete subfloor, confirm there are no cracks or signs of excessive moisture. Like; 3 days ago · The cement board is secured to the subfloor using screws or mortar, providing a secure and immovable surface. ANY of those in a tile subfloor is a guaranteed failure. I won't be extending the cement board under the tub, it wasn't a good idea. 3 kPa) when cold-formed steel framing is spaced 24" (610mm) O. Firstly, ensure that the existing subfloor is clean, dry, and level. Can I lay 3/8 plywood over cement board for smooth surface instead of removing all glue & rough spots to lay roll Dec 6, 2018 · Both sides are screwed and glued onto joists. You’ll lie down the ¼”+ thick mats in a staggered pattern, attach them to the subfloor below with thin-set mortar, tape the joints of Jun 3, 2023 · Cement board does absorb moisture quite easily, but it also dries out fast. Remove old flooring, leaving the base exposed. Available as a 3/4" structural panel with Tongue and Groove and Square Edge The simple installation in a multitude of different construction systems across the industry allows this cement board to be used in a variety of other applications such as modular, SIPS Nov 19, 2024 · Installing the Cement Backer Board. Jan 14, 2025 · Cement board (or Hardiebacker) is also sold in mat form and is meant to serve as a backer board before tiling. Need to lay the CBU in preparation. This can be overcome by preparing Nov 20, 2022 · Installing cement board subfloor prepping for tile floor you installation cabinet painting kitchen remodeling scranton pa how to install underlayment durock do s and dont cbu the complete guide beginners diytileguy easily prep harbacker backer 1 2in decor on floors 5 mistakes avoid tiling wooden part 4 overboarding uk bathroom guru sub Aug 27, 2022 · Cement Backer Board. Repeat Steps 7 through 9 until all subfloor sheets are removed and replaced. 0. Plywood vs. The fixings should be long enough to secure the board to the joist adequately but not protrude from the bottom. Jump to Latest 15K views 8 replies 5 participants last post by Bud Cline Feb 18, 2011. Now you are ready to attach your board to your subfloor. Or can try try an excavator/backhoe or a few sticks of TNT. Additionally, measure the levelness of the surface. The tile is laid using thinset mortar, left to cure for 24 hours and grouted into place. (I think this is the worst and will definitely leak. Jan 29, 2020 · 1) Install shower on subfloor. NOCOM is a structural cement board ideal for the construction of fire rated Feb 24, 2024 · Attach the cement board: Apply a layer of thin-set mortar onto the subfloor using a notched trowel. Nail the piece of concrete board down onto the plywood subfloor every 4 inches. So, what will be the best for bathroom installation, specifically the shower? While HardieBacker can technically be used for the shower, as it is Jun 16, 2012 · Cut out the new board following the pencil line using the circular saw. You can mix the thinset in a 5-gallon bucket. ) is fine. An underlayment membrane’s main function is to absorb variations in the subfloor, which may have an impact on the surface tiles. JOINING Fill joints with latex-fortified mortar or Type 1 organic adhesive and immediately embed alkali-resistant, fiberglass mesh joint tape. For 19. Heat Resistance. Learn about the factors to consider and the best practices for a sturdy subfloor. Oct 15, 2010 · I then spanned the concrete hearth extension and surrounding subfloor with concrete board. Can I just nail 6-8 inches at the edges and along the floor joists with 2 inch roofing nails instead of every 8 inches in the field? Trying to save some time Installing Tile Underlayment How To Prepare For A Tile Floor Preparing for tile means following a proper subfloor fastening procedure and usually installing cement board underlayment. Mark cuts to fit around fixtures, plumbing, and vents too. This prevents Sep 20, 2024 · Tore tile up in my kitchen with cement board underlayment over plywood subfloor. Jan 9, 2025 · The cement boards can also be cut to size with a fine-toothed saw. For attaching 1/2-inch plywood underlayment to an existing 3/4-inch subfloor, 1-inch length screws are generally recommended. In fact, if you’ve done any tiling in the past the odds are that you’ve tiled over a backer board. You would use one or the other but not both. Mar 12, 2013 · Next, the backerboard is nailed or screwed to the subfloor below using cement board screws. 5. Apr 25, 2024 · For a 3/4 subfloor, the best screw length is 1 5/8 inches. This is a very low seismic area and the building is small enough that wind demands on the diaphragm are very small (the perimeter beams could almost take Mar 6, 2025 · Backer Board & Cement Board. Next, measure and cut the cement board sheets to fit the dimensions of the The ANSI A108-compliant Cement Board Screw is easy to install and durable. Use 1 5/8-inch screws for 1/2-inch backer board and 1 1/4-inch screws for 1/4-inch backer board. Cement Dec 8, 2023 · For a cement board subfloor, the following tools are necessary: Circular saw: A circular saw is used to cut the cement board to the appropriate size. How should I install cbu (cement backer board) on top of this for a tile installation? The entire area is approximately four feet by four feet. Thinset is going to create a solid surface under tile and prevent flexing that could lead to cracking. Fasten HardieBacker cement board with specified nails or screws (as listed Dec 22, 2022 · Attaching the cement board. CBU has a proven track record for longevity and STRUCTURAL PANEL CONCRETE SUBFLOOR/FIBER CEMENT BOARD FLOORING. 7 Alternatives to Cement Board. 4-inch thick and made of cement and sand, thus making it suitable for walls, floors, and countertops. Many people use it primarily when laying tile on concrete, but I think its a solid choice with plywood subfloors as well. Improve this question. Our cementitious panels are ideal for applications where durability and fire-resistance are a consideration for your project. . 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. No matter what youre told at a home center, its not a good idea to install tile directly over plywood, especially in a damp area like a bathroom. There won’t need to be the worry of mold growing, warping, or even rotting once it gets exposed to water. Aug 22, 2024 · The main reason for using thin-set between the cement board and the subfloor isn’t as much for bonding as it is for even, void-free cement board support throughout the floor. To install the cement backer board: Apply a layer of thin-set mortar to the subfloor using a notched trowel. I thought that cement board would have some insulation properties (lots of air voids in the stuff I've used in the past), and that layers of HeatStop would further insulate. This board size is ideal for use in bathrooms. Sep 7, 2022 · The Hardi cement board is 0. A big spud bar. Precut and fit all the cement board and then lift all of the cement boards out. Feb 27, 2025 · A cement board is great for situations where it will need to be submerged in water. When installed Dec 1, 2024 · Subfloor Types Matter: Familiarize yourself with different subfloor materials (plywood, OSB, concrete, particleboard, cement board) and their specific needs for painting and maintenance. Follow asked Apr 3, 2024 at 23:10. , Ltd. One alternative you have to cement board is regular A. Here’s how to do it: Cut the backer board to fit the room, leaving a quarter-inch gap at the walls. Unnecessary: At best, the use of cement board on concrete is an unnecessary step that creates more labor for the project. The seams are taped, and once the thinset has cured -- in about 24 hours -- the tile can be installed on top of the backerboard. However, cement board manufacturers like USG have a different opinion. Once the subfloor is prepared, the next step is to attach the cement board to the walls. Use a scoring tool along the measurements. For flooring applications over a wood-based substrate, laminate USG Durock® Brand Cement Board with EdgeGuard to subfloor using Type 1 organic adhesive or latex-modified thin-set mortar suitable for bonding cement Aug 5, 2021 · 3 | Attach HardieBacker cement board to subfloor • Apply a supporting bed of mortar or modified thinset to subfloor using a 1/4 in square-notched trowel. The way that you install backer board is you first trowel mortar over the subfloor then embed the backer board into it and fasten it down. When using it as a base for heated floors, the manufacturer’s instructions should be followed carefully. Multi-Panels offers a family of fire-resistant & structural building panels for applications ranging from Subfloor, Roof Deck, Wall Sheathings, Underlayment and Fire-Restrictive Weather Barriers 5 days ago · Download the PermaBASE UltraBacker® Cement Board Installation Guide. Fasten HardieBacker cement board with specified nails or screws (as listed Aug 29, 2019 · I could have added a more dimensionally stable subfloor (OSB, plywood, or cement board) on top of the hardwood. Before the cement board is installed, the subfloor must be properly prepared with a moisture barrier, such as roofing felt, and a layer of thin-set mortar needs to If you're preparing to do a ceramic floor or wall installation, it's recommended that you install HardieBacker cement board on your subfloor or wall before you begin to lay the tile. sheets are also available but will be a lot It is lightweight and of high strength. Placing cement boards over the Jun 29, 2023 · Most people assume that screwing cement board is enough to bond it to the floor or wall. Plywood is often my go-to choice due to its strength and versatility. Ditra is installed directly on top of the substrate with a thin-set mortar. to walk on the cement board before the thinset sets Share Improve this answer Jun 9, 2022 · Cement board, as we covered in the opening section, is made out of a combination of water, Portland cement, and some sort of reinforcing fiber or mesh throughout the middle of it. USG specifies a 5/8-inch or thicker plywood or OSB subfloor for proper installation of Durock, and Custom Building Products Multi-Panels manufactures cement boards (MgO / MgSO4) for sub-floors, walls, roofs, underlayments, fire-restrictive weather barriers and more. These concrete panels are certified by May 18, 2008 · Normally, in woodframe construction, there are one of several underlayments used-- luan, 1/4" particle board, 1/4" plywood, and sometimes even MDF (medium density fiberboard). As long as the subfloor is sound, cement board (Hardiebacker, e. Apr 10, 2022 · The biggest benefit of using cement board as a subfloor is that it will last for a very long time. FLOORS AND COUNTERS. • Use the fastener pattern as a guide. It prevents squeaking by holding underlayment tight to Apr 3, 2024 · subfloor; cement; cement-board; Share. This is typically done using cement board screws or nails, and the seams between the sheets of cement board should be sealed with thin-set mortar and fiberglass mesh tape. It is coming up in pieces either way. ; Height Issues: Some tile installations may require the extra 1/4- to 1/2-inch MagMatrix Perseverance model BMSC 517 New sulfate MGO Structural Subfloor Board 18/19mm (3/4") can carry a total load, alive and dead, of 320 psf (15. Proper installation would be to follow the manufacturers installation instructions for applying cement board to a subfloor. the joist Aug 22, 2024 · One of the keys to a long-lasting tile installation is the underlying subfloor. Fixing the Cement Boards Using Thin-Set and Screws. Nov 2, 2005 · I am renovating a bathroom using Hardibacker cement boards over the subfloor in preperation for tile. I believe for the 16" joist spacing involved, 3/4" plywood subfloor is sufficient structurally for the room, so adding 1/2" plywood over the 3/4" plywood instead of the 1/2" cement board under the tub is also not necessary structurally, and to oh'mike's comment, 3 days ago · 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. When working with cement boards, it's important to use the right type and size of screws to ensure a strong and secure hold. B. Use 1 5/8-inch screws for 1/2-inch backer board. Here’s how to add Feb 24, 2024 · In summary, cement board is a specialized subfloor material that offers several advantages over plywood and particleboard. Drywall. The cement backer board is more dimensionally stable than plywood and forms a better bond with the thin-set adhesive used to glue the tile down. Place the cement board onto the thin-set mortar, pressing it firmly into place. 80 per square foot for 1/4-inch board. After you have decided on Cement boards are one of the common and widely-known backer board used for shower walls and it is commonly sized at 3 x 5 ft. Jul 6, 2013 · Remove a single piece of your dry-laid board. Install cement board with ends and edges closely abutted, but not forced together. per sheet and it compliments the common sizes of bathtubs. It offers a superior and price-competitive, environmentally friendly alternative to subfloor boards from fiber Sep 21, 2009 · Why do people recommend OSB vs. 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. Stagger end joints in successive courses. I ripped it all up and I put the new pieces of wood back down. That said, if cement board is being used as a tile backing for your shower, then a layer of waterproofing is called for. around the Feb 28, 2025 · Brand Cement Board with EdgeGuard™ cement board is an outstanding backerboard for a wide variety of reasons. Mar 18, 2022 · Cement-Based Backer Board . Depending on the subfloor material, you will need to ensure it is sturdy enough to support the weight of a built up shower pan. Then you can install the cement board on top of the plywood. If new ceramic tile is being laid on an existing floor, the cement board can usually be laid right over the existing floor finish, provided the floor is in good shape and the extra thickness is not a problem. With the subfloor prepared and the backer board cut to size, it’s time to start the installation process. Feb 27, 2025 · Brand Cement Board with EdgeGuard™ cement board is an outstanding backerboard for a wide variety of reasons. A cement board requires screws or nails to attach to the substrate before applying thin-set mortar. Here‘s why it‘s so great: Extreme Durability – Cement board is highly moisture-resistant and won‘t warp, shrink or expand over time like wood can. Verify that it is straight and secure. I'm planning on putting cement board across both sides to prep for tile after that. Replace the board on top of the mortar. Ensure that these fixings are evenly spaced and driven in straight. For this reason, cement boards must be firmly secured in place to prevent them from shifting or resulting in unnecessary damage down the line. A minimum of 3/8" plywood, thicker would be better. I'm having a REALLY hard time getting sections of the cement board off of hte plywood sub floor. E. Lay the sheets in the mortar while it's fresh and screw them to the Jan 21, 2025 · BMSC 517 is already making waves in the construction world with its promising applications and sustainable credentials. Fasten HardieBacker cement board with specified nails or screws (as listed Nov 13, 2024 · Placing cement boards over the concrete subfloor is an excellent way to create a solid and smooth subfloor. Here's why: Minimal Elevation Change: Jun 16, 2020 · I have old plank subfloor installed at a 45 degree angle to the floor joists. Ensure the screws penetrate both the cement board and the subfloor to create a secure attachment. Clear out everything in your way. However, it is important to note that using concrete board as subflooring is not ideal in situations that require Jan 3, 2025 · For floors, the decision depends on your subfloor’s stability and structural load-bearing capacity. All Backer Board & Cement Board; Mineral Fiber Wall Boards Mineral Fiber Wall Boards. Dec 10, 2014 · Can not install any cement board over that subfloor without first adding plywood. Make sure to countersink the fasteners slightly below the surface of the cement board, but not too deep to avoid damaging the board. These boards form a barrier between the frame or exterior of the area and the new tile installation. Cement Board: Cement board is a robust and moisture-resistant subfloor material that serves as an excellent foundation for tile installations, especially in wet areas such as bathrooms and kitchens. Securing the Subfloor; Use appropriate screws or nails to secure the subfloor to the joists. To make a clean score line, apply Apr 27, 2017 · 3 | attach HardieBacker cement board to subfloor • Apply a supporting bed of mortar or modified thinset to subfloor using a 1/4” square-notched trowel. Nov 19, 2008 · Just finished installing a new subfloor & underlayment (3/4" and 1/2" plywood), old one was shotlooks great now, solid as a rock. When installing tile over a plywood subfloor, you’ll need to install a layer of cement backer board. Remove any traces of old flooring, adhesives, or debris to ensure a smooth and even surface. 5 days ago · When installing cement board, it’s important to use screws that can easily penetrate the cement board and hold firmly in place. Nov 8, 2021 · Stagger the cement board joints a minimum of 16 inches so that four corners never meet. Prime the deck Aug 20, 2014 · Re: Using layered cement board for hearth subfloor OK, I understand the point. 3 days ago · Noncombustible concrete subfloor panels offer fast installation, structural stability, and 1- and 2-hour fire-rated assemblies. Sep 9, 2022 · Step 1: Mix Thinset – You should use some thin set mortar between the subfloor and the cement board. The degree to which Nocom Structural Cement Board for subfloor, roofs, mezzanines, platforms, modular, balconies, etc. it's O. Laying the Backer Board. Take out the toilet, sink, and vanity. Ready to start my first tile project. Place screws or nails 8 inches apart along the edges of the panels and 12 inches apart in the center. Cut The Cement Backer Board. Measure everything twice before making any cuts. The thinner, 1/4” cement board is often the go-to choice for most floor tile installations. I scrolled down to look at the comments and they did not disappoint. It prevents squeaking by holding underlayment tight to the subfloor and resisting pullout. Mass is mass so whatever you have available that is inexpensive is a good idea. The screws should be spaced 6 inches apart around the perimeter and 8 inches apart over the field in all directions. Jun 9, 2023 · One of the important differences between Ditra and cement boards is how they are installed. Make a score on the board: Change the blade in the utility knife. Dec 19, 2023 · Positioned directly on the joists, the subfloor forms the underlayment and surface flooring foundation. TOM: OK. What were his replies, you ask? “The thinset goes ON TOP of the cement board to stick the See more Jan 25, 2025 · Choosing cement board as a subfloor material can be an excellent decision for moisture-prone areas in your home. Measure your subfloor and mark the cuts needed with a pencil. This was topped by granite tiles, which raised top surface slightly above adjacent finished oak floor. The subfloor should be a minimum 5/8" APA Span-Rated Plywood or OSB with an Exposure 1 classification or better and should be designed with a minimum deflection limit of L/360 for the span. 4 x 8 ft. When using a cement backer board, you can go with whether a ½ inch thickness or a ¼ inch thickness. Apr 30, 2011 · Cement board attached to plywood or similar underlayment will hold with only 1 1/4-inch screws; for thick or heavy metal fixtures, use 1 5/8-inch screws. The instructions say to install with smooth side up, but it seems that the rough side would adhere better to the tiles. Here is a link that might be useful: Hot mop shower pan. 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, Oct 18, 2023 · Use corrosion-resistant screws or nails to secure the cement board to the subfloor. As a subfloor, it is difficult to find material that is as durable as concrete. In finished basements, the subfloor often rests on the concrete slab, sometimes with a moisture barrier in between. Dec 12, 2023 · This comprehensive guide will help you choose the perfect subfloor for your bathroom, ensuring a durable and long-lasting foundation for your tiles or other flooring materials. Space alkali resistant fasteners 8" o. I'd be more sceptical of the hot mop unless it's by a large reputable installer. thick cement board. Disconnect pipes and turn off the water. Galvanized screws, steel screws, and cement board screws are code-approved best screws for subfloors. Cement boards Feb 19, 2023 · A cement backer board underlayment, also called a cementitious backer unit or CBU, is best for only mortar floorings such as stone, ceramic, and porcelain tiles. With its corrosion-resistant coating, the Cement Board screw is ideal for use with all tile and cement backerboards. In addition, thinset helps to reduce the chance of Dec 5, 2024 · Grab plywood or cement boards for the subfloor. When I had Durock Cement Board requires a subfloor which should be minimum 5/8" APA span-rated plywood or OSB with an Exposure 1 classification or better. One of the key advantages of cement board is its compatibility with tile installation. ). The subfloor creates a stable, level surface and provides a base for attaching new carpeting, laminate, hardwood, vinyl, or tile. OSB. Jun 2, 2022 · Cement board is a rather expensive material, although its very high level of waterproofing does make it ideal for high moisture areas. You have two options: roll on a liquid latex membrane or . Learn installation tips for a durable, long-lasting tile floor. Add a water seal agent to the new subfloor before adding cement or backer board for tile Nov 27, 2023 · When installing cement board as a subfloor material for a bathroom, there are a few key steps to follow. Let’s now take a quick glance at the seven best alternatives to cement board, and what they are best used for. Then spread thinset mortar with the flat side of a 1/4-in. Polyethylene is a special type of soft plastic, somewhat similar to rubber. c. Instead of using the cement board, many shower floor installers recommend making a mortar shower pan or using a manufactured shower pan, both of which can be installed and covered with tiles. Unlike wood or 5 days ago · Yes, concrete board can be used as a subfloor in certain applications. Aug 14, 2018 · the field of the board. Fill the joints with mortar and reinforce using alkali-resistant glass fiber tape. Not OSB, plywood. An additional coating of thin-set is applied to the cement board’s surface to hold the tiles in place. Jan 11, 2025 · CHRIS: I had a leaking toilet that rotted my wood subfloor. Sep 29, 2024 · Get the right screw size for your second subfloor to avoid a squeaky, uneven, and unsafe floor. K. While both types of backer board need to be secured to the subfloor, their installation materials are different. Nail the Concrete Board Down Nail the piece of concrete board down onto the plywood subfloor every 4 inches. 4. Previous slide Dec 15, 2016 · The ANSI A108-compliant Cement Board screw is durable. It’ll also require 2 mortar layers to support the load of Feb 28, 2025 · Cement Board Products DUROCK Brand Cement Board offers architects, builders and tile con-tractors a strong, water-durable base for ceramic and stone tile in tub adhesive for subfloor attachment to framing must meet ASTM C557-73; ceramic tile adhesive must be Type I, meeting ANSI A136. However, the way the cement board is made will make your workplace covered with dust within a few minutes. To make round cuts, an electric jigsaw can be used. Then use self levelling compound over the whole space to get rid of the 15mm discrepancy. 2. On the contrary, the installation of uncoupling mates requires more time and effort. Nov 7, 2021 · If the subfloor doesn't have enough stability, you can usually (but not always) remedy the situation by installing cement backer board, also called cementboard. Thereof, can cement board be used as subfloor? Cement board (used in tile underlayment) is now standard for most tile installations, but Feb 15, 2025 · The boards are available in three-foot-by-five-foot and four-foot-by-eight-foot panels. Once the concrete subfloor is clean, flat, and free of significant cracks, apply the membrane. Glued & screwed the subfloorscrewed the underlayment (UL) to the subfloor while avoiding the joists. Jan 3, 2025 · Discover the ideal thickness for your tile underlayment with our detailed guide on 1/4” vs. Backer Board & Cement Board. The MTH Underlayment screw is designed for underlayment-to-subfloor installations. Cement board is best suited for: Ceramic and Porcelain Tile: Cement board is specifically designed to be a moisture-resistant substrate for tile in high-moisture areas like bathrooms and 1 day ago · Cement board is ideal for areas with a lot of moisture such. 1. Dec 21, 2009 · Key items on our list included: enough hardibacker (aka cement board, aka backerboard, aka Durock) to cover the shower surround and floor, greenboard (which is moisture-resistant drywall) for the other walls, 3/4″ plywood to lay a super sturdy subfloor and some new 2x4s to repair the rotted floor planks that we uncovered. The Strength of Portland Cement 2 days ago · Nocom is a structural cement board for fire-rated construction of floor, walls and roofs. Using thinset between the backerboard and subfloor will create additional strength, fill in any potential gaps that 4 days ago · Ameriform offers structural cement boards for fire-rated floors, roofs, walls a decorative cementious rain-screen & cladding panels. This Premier® Subfloor Boarding system Jul 24, 2024 · 3 | Attach HardieBacker cement board to subfloor • Apply a supporting bed of mortar or modified thinset to subfloor using a 1/4 in square-notched trowel. Jan 26, 2025 · Choosing the Right Subfloor Material. Then bend/snap the cement board upwards to cut it to size. APPLY CEMENT BOARD Sep 6, 2021 · Laying a cement board under a tile. Nail the Concrete Board Down. For flooring or wall installation, some builders choose to apply a thin layer of thinset mortar under the cement Feb 16, 2022 · Ditra is made by Schluter and is an “alternative” for the commonly used cement board or HardieBacker. 899 Sheridan Dr, West Chester, Pennsylvania. On the downside, installing vinyl plank over a cement board subfloor could cause any imperfections in the subfloor to show through. others suggest using deck screws or cement board screws. Most people think that this is for bonding but in reality, is to keep any voids from existing. Space Fasteners every Sep 7, 2023 · Then, screw the backer board into the subfloor using special backer board screws. It comes in 3 x 5 sheets, and you install it more or less like drywall. Too many shortcuts. Beijing North Refractories Co. All wooden subfloors flex to some degree. Spread a layer of thinset mortar onto the plywood with your trowel, instructs Family Handyman. On the other hand, Schluter-Ditra is made out of polyethylene. Thinset is a type of mortar that is essential for the proper installation and bonding of Hardie board to the subfloor or other surface. Step 2: Prep the Bathroom for Action. Its rigid and level surface is Feb 16, 2011 · cement board subfloor. Dec 22, 2023 · Apply mortar to the subfloor and embed the cement board, fastening it with nails or screws. All Mineral Fiber Wall Boards; Sheathing Sheathing. See link for proper hot mop installation. I’m unsure what prep work (primer/DPM-If needed) needs to be done due to having two different subfloor materials. Place screws at specific distances from board edges and corners. 2 days ago · Thinset is a type of mortar that provides a strong bond between cement board and the subfloor. Once I confirmed that the concrete was in good shape, it was time to choose the subfloor material. I plan on screwing the backer board down without thinset between it and the subfloor. This strong bond will create a solid base, which is necessary for the installation of ceramic or porcelain tile. To meet the structural requirements for a sub-floor, you will probably need 3/4 T&G plywood or OSB. 85 (when volumetric mixing is required for small projects, a 1:7 cement aggregate mix may be used). It prevents squeaking by holding underlayment tight to Sep 8, 2006 · How would a person sucessfully attach 1/4″ cement board (NG PermaBase) to a 3/4″ Advantech subfloor, WITHOUT having screws/nails protrude through the subfloor to puncture staple-up radiant tubing underneath? My thought was to Oct 13, 2023 · These are brand-new items that can be put in between tiles and subfloor. May 15, 2023 · 5 Issues With Using Cement Board on Concrete . 8. Overview: Cement backer board comes with a long history of successful installations. The ANSI A108-compliant Cement Board Screw is easy to install and durable. Should I use 1/4" Plywood to bring the two sides to level? Is there something else to use instead Feb 28, 2025 · USG Durock® cement board is preferred by many applicators as a base for directly applied finishes, tile, stone and thin The subfloor system should be designed with a minimum deflection limit of L/360 for the span. floor joists, 3/4” tongue-and-groove exterior-grade VERSAROC cement board structural subfloor panel is a UL listed structural panel. As mentioned earlier, screwing cement board to a substrate is never enough. C. The length of the screw will depend on the thickness of the MagMatrix Premier® Fire Resistant Subfloor BoardFlooring Board has opened the excellent quality of Tongue & Groove edge which could offer an extensive range of floor options and solutions. This screw spacing ensures a stable and secure subfloor installation. Sep 29, 2023 · Cement board is better for areas with movement, water exposure, and subfloor imperfections, like kitchens, bathrooms, and laundry rooms. Product compositions range from fiber-cement, Mgo Board, Magnesium Oxide Board, Mgo Floor Boards. “I can’t pay my staff or mortgage with instagram likes”. Accuracy now saves you headaches later. Place the straightedge on the cement board: Put the straightedge on the cement board along the cut line. Apply a layer of thin-set mortar to the subfloor using Mike- The Durock Cement Board with EdgeGuard is not a structural panel and should be applied directly to an approved subfloor. Because a cement backer board is porous, mortar, grout, and Sep 21, 2024 · Screw length for 1/2 cement board. However, some sources suggest using longer screws, such Jul 26, 2023 · cement board subfloor suppliers - Select 2021 high quality cement board subfloor products in best price from certified cement board subfloor manufacturers, suppliers, wholesalers and factory on Tradechina. Subfloor or Base: For flooring applications with 16” o. The Strength of Portland Cement Apr 13, 1999 · I’m going to tile over 1/2 inch 4×8 sheets of durock cement board laid over a 3/4 ply subfloor. Just the other day, I saw a video featuring someone fastening Hardibacker directly to the subfloor with nothing underneath it. Do I need to use thinset under the cement board like some articles I’ve read say??. Mar 20, 2024 · DragonBoard structural subfloor may be used with any of the following compontents as listed in Underwriters Laboratories (UL) design G575: DragonBoard outperforms traditional fiber cement boards and wooden Jan 8, 2025 · My plan was to fix down 18mm cement board (or similar) to the concrete slab side to take up to the plywood height. Join the future of construction with Jinpeng Group’s MagMatrix Brand BMSC 517 New Sulfate MGO Cement Board for Subfloor and Wall sheathing —a material built to perform and protect. Run cement board and floor tile right up to it and caulk. Composed with a proprietary chloride-free magnesium oxide cement with high-strength fiberglass mesh, Nocom offers premium Jun 16, 2020 · 1/2 inch cement backer board on top of the thinset and screwed in just after the thinset is applied. UL Listed for use in steel & wood construction. 1/2” cement boards. The fire-rated structure is resistant to fire, water, and mildew, insulating to sound and heat. Thinset also helps to fill in uneven areas between the substrate and the cement board. Leave a small gap of about 1/8 inch between the boards to allow for expansion. 9. All Backer Board & Cement Board; Mineral Fiber Wall Boards Dec 16, 2024 · Use corrosion-resistant nails or screws to secure the cement backer board to the plywood subfloor. The 1/4 inch cement board also works well when used as a base for a heated flooring system. Learn about different types of subfloor options, including plywood, cement board, and composite panels, and discover tips for installation and maintenance. Step 4: Starting at one corner, insert the screws into the cement board and subfloor. Shawn O'Neil Shawn O'Neil. Concrete is usually a good subfloor on which to install ceramic tile. With its durability and resistance to water damage, it Mar 28, 2024 · Installing Hardie® Backer cement board to a wooden subfloor is as simple as that! Hardie® Backer cement board can be used with nearly any kind of tile, whether ceramic, porcelain, or natural stone. While installing a cement board, the boards must place on a layer of thin-set glue, a procedure called bedding. 3 days ago · The 1/4 inch thickness of cement board is thin enough to allow it to conform better to minor imperfections in the subfloor. Backer board prevents leaks and water damage that could harm your flooring and the structure of your home. if joists are spaced 16 inches then you need 3/4 inches of sublfoor under the cement board Those are the generalities. But plywood is an acceptable choice if your subfloor is dry and stable. Aug 7, 2023 · Installing fiber cement boards as floorboards involves specific considerations due to the load-bearing nature of floors. Secure the cement boards to the subfloor by using Nov 27, 2018 · Before laying cement board prior to installation of floor tile, the subfloor must be sound and level. Preparation is Key: Thoroughly clean and repair your subfloor before painting to ensure better adhesion and a longer-lasting finish. 11 2 2 bronze badges. notched trowel and use the If joists are spaced 24 inches then you need 1. Also, it is perfect for tiles, Example: If you have a concrete subfloor that is slightly uneven in places, but it is still generally sturdy, you should be fine to use a bit of extra tile adhesive in those uneven Oct 9, 2023 · Advantages of Cement Board Under Vinyl. Be sure that cement board joints do not align with any cement board joints on the floor (if applicable). 7. Its composition Jun 12, 2024 · Whenever you’re laying tile on a wood subfloor, you need to first install cement backer board. 1 post · Joined 2011 Add to quote; Only show this user #1 · Feb 16, 2011. Over the years, I’ve experimented with different options like plywood, oriented strand board (OSB), and foam panels. Apr 2, 2014 · Thanks for the well thought out replies. This depends on your subfloor deflection rate. and 24” o. 2” o. 5 inches of subfloor under the cement board. In general, 1 1/2-inch galvanized nails will hold the board firmly in place. 1; 6 days ago · For instance, if cement boards are not installed properly, water can leak into the shower subfloor and damage it. No reviews yet. Once your cement board sheets are in position, fasten the cement board sheets to the subfloor using special cement board screws. When installing a ceramic tile floor on a concrete subfloor, you don't have to worry about flexing as long as the concrete slab is at least 1 1/8-inch thick, which most slabs are. Score and snap tool: A score and snap tool is used to make clean and Nov 7, 2021 · Cement backer board is the most popular underlayment for ceramic and porcelain tile. ; Costly: Cement board costs about $1 per square foot for 1/2-inch board and about $0. It has to be rock solid before you lay the 1/2-in. Make the right choice for your Oct 15, 2021 · Flooring: For ceramic tile floors, the cement board usually rests on a plywood subfloor (minimum 5/8-inch-thick exterior-grade plywood or OSB). The plywood subfloor should be at least 5/8” thick on 16” centers (3/4″ preferred) and securely attached to the joists preferably with screws. Ditra is applied to the subfloor with thinset (either modified or Oct 16, 2021 · Cement boards are commonly used as an underlayment for tile, installed over walls, floors, and ceilings. If youre working over a wood subfloor, cement board is the right choice for your tile base. CHRIS: Well, my cuts weren’t exactly perfect and there’s some spacing in between, like maybe 3/16. HardieBacker is available in both 1/4-inch and . eadamiec Discussion starter. fprd heo tbjay evay fhatoo ofwtxz opjwo gbe vulxv lbpbc uouayo quosyv dloyutn fqjnut xoneyf