• Completely fill the square cavities of the uncoupling … Types of thinset. Not exactly. Should I use modified or unmodified thinset? Exceptions for membranes. In the last few decades, new types of tile have been gaining popularity, and many require different formulations of thinset for proper adhesion. In the above scenario, modified thinset could potentially take up to 60 days to cure. Standard thin-set mortar for floors. The manufacturer knows its products, and more importantly, it warranties its products only when they’re installed according to its recommendations. and other tile types with its increased resistance and flexibility. link to How To Reset A White Rodgers Thermostat By Model (Do This! Tom Meehan, author of Working with Tile, is a second-generation tile installer who lives and works in Harwich, Mass. With some uncoupling membranes, you may actually need to use both types of thinset if you are going over a plywood substrate. How To Reset A White Rodgers Thermostat By Model (Do This!). Never use Mapei or Customs unmodified and probably won't because I'm not one to run around just to try stuff. VersaBond 50 lb. We are here to help; 800-272-8786 ; Contact Us CustomTech Flooring Prep . It is best to work in a small area at a time since the thinset hardens in about 20 minutes. Modified vs. Unmodified Mortar With Kerdi Membranes. Uncoupling Membrane Mortar Unmodified mortar to use with uncoupling membranes. This is not true. Unique retention compounds added into the thinset make it a modified thinset. It is difficult to find and has limited availability. Uncoupling Membrane Mortar is part of the lines: Tile & Stone Installation Systems-Dry-Set Mortars. Together with her husband, she has been spending the last several years lovingly renovating her grandparent’s former home, making it their own and learning a lot about life along the way. Custom Building Products VersaBond 50 lbs. Unmodified mortar to use with uncoupling membranes. Uncoupling Membrane Mortar is a dry-set mortar for use in large-and-heavy-tile (formerly known as “medium-bed”) and thin-set applications for installing tile on floors and walls. However, a Lowes's salesperson pointed out to me that the Mapei uncoupling membrane mortar is in stock and is used by their customers doing Kerdi shower work. Press Kerdi fully into the bond coat. So far we’ve talked about thinset choices for types of tile and for different substrates. Modified Thinset. Apply DITRA® to the floor, fleece side down. pro bit porcelain diamond Hole Saws (1/8″ to 6″) by RTC $ 24.95 – $ 259.99. This long drying time is attributed to the fact that the thinset would only have access to air coming through grout joints. The formulation of today’s tile is just too complex, so instructions must be followed exactly. Sometimes, unmodified thinset will be referred to as dry-set mortar. For thinset, the code is A118.1, which represents all unmodified thinset. Thinset is a type of adhesive mortar often used to affix stone or tile to various surfaces, especially concrete or cement flooring. premium, Large-and-Heavy-Tile and Thin-Set Mortar Uncoupling Membrane Mortar is a dry-set mortar … If you are working with waterproof elements, then unmodified thinset is likely your best bet. I have not used Kerdi but have used Ditra. Choose STRATA_MAT™, an uncoupling membrane designed to minimize the floor height gain from tile installation materials in both residential and commercial applications (including porcelain or large format tiles). Uncoupling Membrane Mortar is an unmodified, dry set, medium bed mortar that was created for use with uncoupling membrane and waterproofing membrane. Uncoupling Membrane Mortar is a dry-set mortar for use in large-and-heavy-tile (formerly known According to the TCNA, dry-set mortar is Portland cement mixed with sand and additives that impart water-retentivity, and it’s used as a bond coat for setting tile. VersaBond 50 lb. Thinset is usually composed of fine sand, cement, and a chemical agent that retains water. For most tile jobs, using modified thinset is more comfortable, faster, and ultimately gives you a healthier, more durable hold. Some of the ANSI codes that designate a product as modified thinset are A118.14, A118.11, and A118.15. If there is more than one code on the bag, then it is modified thinset. This is because it does not allow fluid to pass through. Polymers are added in either a powder or a liquid form. If the polymer is a powder, it is included in the thinset and activated later when water is added to the mortar. But now my showers are all HydroBan so I'm not worried about the unmodified stuff. Surface Prep . This long drying time is attributed to the fact that the thinset would only have access to air coming through grout joints. A high-quality thinset will have more cement than sand, which makes it sturdier and provides more adhesion. However, thinset can be used anywhere that comes into contact with water, such as bathtubs, showers, pools, and backsplashes. (82.95 kB) Q. … Thin-set is a specialized mortar that has been designed to be applied as a relatively thin (3/32" or less) layer. Excellent for wet areas (including pools and showers) when mixed with MAPEI's Polymer Additive (#13956) Unmodified mortar Masterblend: Currently Custom’s only readily available (to my knowledge) unmodified thinset. Unique retention compounds added into the thinset make it a modified thinset. It adds water resistance and improves shock absorption. 3. Professional, lightweight tile mortar with polymer. In these situations, modified thinset won’t set properly since it isn’t exposed to much air. Installation Guide PDF. Modified thin-set mortars need air to cure properly, and since the mortar in this case would be applied between two impervious layers, this type of mortar would take a long time to cure. Unmodified mortar to use with uncoupling membranes. About Schluter-Systems. When we tiled over concrete slabs, cement board, drywall (gypsum board), or similar products, we used dry-set mortar with no latex additive. Modified thinset needs air to cure appropriately; therefore, using it between two waterproof surfaces makes it difficult for it to set. If the polymer is a liquid, it is mixed with the thinset in place of water. If you can get your hands on it, use it. If we used dry-set mortar over plywood, the bond between the tile and the plywood substrate usually failed within a year. However, a Lowes's salesperson pointed out to me that the Mapei uncoupling membrane mortar is in stock and is used by their customers doing Kerdi shower work. However, the unmodified thinset needs to be used between the membrane and the tile, instead of the membrane and the subfloor. The appropriate product standard for unmodified thin-set mortars is ANSI A118.1. Because these types of resilient tile are being made by a variety of tile companies in a variety of configurations, thinset manufacturers have had to create different types of latex/polymer-modified mortars to work with the specific tile that’s being installed. Premium, Large-and-Heavy-Tile and Thin-Set Mortar. Is Schluter Allset the best thinset for large format tile? So here’s the million-dollar question: Will it be a disaster if I use the wrong thinset (latex modified) on top of an uncoupling membrane? The modified thinset mortar, on the other hand, does include polymers that are mixed into the dry mixture. Dry-set mortar is comprised mostly of cement, sand, and a water retention agent, and is also called unmodified mortar. The mortar layer you apply to anchor the membrane fills low spots, but it can't remedy high spots, so you have to chisel or grind these down. Is one option a better choice, or does it just become a matter of personal preference? Like everything in life, modified and unmodified thinset each possess unique strengths and weaknesses. Therefore, when you are prepping for your tile job, consider where your tile is going and what materials will be used. Unmodified mortar to use with uncoupling membranes. Update: Schluter just recently came out with their own line of Schluter branded thinset mortars.They have both modified and unmodified and approve their use with Ditra. https://upgradedhome.com/modified-thinset-vs-unmodified-thinset However, overall, the actual application process of these two products is fairly similar. The answer is both. And when we tiled over plywood substrate, we used latex-modified mortar. 2. However, there are some instances where it is not recommended to use a modified mortar. Schluter FAST-SET®, or unmodified thin-set mortar DITRA or DITRA-XL interior dry or wet areas uncoupling membrane Schluter ALL-SET®, Schluter FAST-SET®, or modified thin-set mortar Single layer of plywood or OSB Joists, I-joists, or trusses 16" (406 mm) o.c. The upper thinset is the problem. The bond would still be there, but because the latex slows down the hydration process, the modified thinset does not set up as readily as the dry-set mortar. Uncoupling Membrane Mortar Unmodified mortar to use with uncoupling membranes. In the above scenario, modified thinset could potentially take up to 60 days to cure. Schluter-Systems will continue to warrant its systems when other manufacturers' unmodified thin-set mortars meeting ANSI A118.1 are used to install tile. I will need unmodified thin set mortar for membrane application and for setting the tile over the membrane. These mortars have a little more Portland-cement content, which provides a stronger bond without latex. It dries slower, which allows you to readjust any issues as needed while it’s drying. Look for this standard on the packaging (e.g., product meets ANSI A118.1 when mixed with water). If you are trying to decide whether you should use thinset or mastic, it is essential to keep in mind the mastic can only be used in areas that are damp or dry. Keep in touch. Uncoupling Mat Mortar does fit the requirements of an ANSI A118.1 thin-set mortar to be used in conjunction with an uncoupling membrane, as recommended by many manufacturers of uncoupling membranes. Modified thin-set mortars need air to cure properly, and since the mortar in this case would be applied between two impervious layers, this type of mortar would take a long time to cure. Here's a sample question: What's the maximum span of an unsupported 2x12 stair... Business Lessons Learned - Solid PVC and Composite Sidings - Decks Over Roofs, JLC Online: Best practices for professional builders and remodelers. Uncoupling Membrane Mortar Unmodified mortar to use with uncoupling membranes. Dry-set mortar is comprised mostly of cement, sand, and a water retention agent, and is also called unmodified mortar. When it’s installed correctly, it’s safe and economical. However, should you get modified or unmodified thinset? There are also some additives that you can put into some unmodified thinset to increase the retention properties. Most of the time, when you purchase thinset, you should be able to tell from the packaging if the thinset is modified or unmodified. Changes in the industry. You might see something like this – “product meets ANSI A118.1 when mixed with water.”. Unmodified mortar to use with uncoupling membranes. But uncoupling membranes, waterproof membranes, and crack-isolation membranes can literally add another layer of confusion to the issue. Unmodified mortar to use with uncoupling membranes Uncoupling Membrane Mortar is a dry-set mortar for use in large-and-heavy-tile (formerly known as “medium-bed”) and thin-set applications for installing tile on floors and walls. CA Prop 65 PDF. Unmodified mortar to use with uncoupling membranes Uncoupling Membrane Mortar is a dry-set mortar for use in large-and-heavy-tile (formerly known as “medium-bed”) and thin-set applications for installing tile on floors and walls. However, if you're incorporating a floor heating system over a concrete subfloor, we recommend installing an insulating underlayment to prevent heat-loss to the slab. Do you want to spend less money or less time working on your project? UNCOUPLING MEMBRANES AND POLYMER-MODIFIED MORTARS IN TILE INSTALLATIONS Technical Bulletin Technical Services 800-282-8786 custombuildingproducts.com There is a misunderstanding that a polymer-modified mortar will not cure under porcelain tile when installed over an uncoupling membrane. If you are unsure, pay attention to the ANSI (American National Standards Institute) number on the product. Modified cement includes certain products that allow for better water retention and increased performance. Leveling. Examples of these types of situations are installing a shower substrate or using an uncoupling membrane under your tile. Whether you use unmodified or modified thinset, the application is roughly the same. If you're just installing the tile over the concrete subfloor, then unmodified thinset is a good choice. Of course, no matter what type of thinset you decide to use, the quality of the installation is critical. Download Go to solutions. When it comes to installing the cement backer board, you will want to use thinset mortar. Floor Tile Mortar. If you are laying floor tiles over a waterproof membrane or working with other impervious areas, an unmodified thinset is recommended. Seal Beach, CA Technical Services 800-282-8786 custombuildingproducts.com ABOUT The AUThOr … Technical data sheet Since this membrane provides an impervious layer, it helps the unmodified thinset retain its moisture. How Are Modified And Unmodified Thinset The Same. Q: What is the difference between unmodified vs. modified thinset, and in what situations should each be used? Apply mortar to an area no greater than to which Schluter ®-DITRA® can be installed in 20 to 30 minutes. However, there are some modified thinsets that do come premixed. A: Tom Meehan, co-author of Working With Tile (Taunton Press, 2011) and a second-generation tile installer from Harwich, Mass., responds: The question about when to use latex-modified thinset (called latex/polymer-modified mortar) versus when to use unmodified thinset (called dry-set mortar) has been the subject of many heated debates in the tile industry and has even had the pros and big manufacturers at odds. If any evidence of skinning or setting occurs, remove and replace with fresh mortar. … MAPEI recommends adding 5% to 10% in overage to ensure that your entire project is covered. Subsequently, question is, can I use unmodified thinset on cement board? Floor Tile Mortar. The answer is no, but it is much better to use dry-set mortar as recommended by the tile manufacturer to maintain the warranty. Although modified and unmodified thinset are two different products, they both share a couple of similarities. First let’s look at what each type of thinset is composed of and how the Tile Council of North America (TCNA) describes the two types. Mixed with water, meets ANSI A118.1 specifications . Apply thin-set mortar to the substrate using a 1/4" x 3/16" (6 x 5mm) V-notched trowel, which features a 1/8" x 1/8" (3 x 3mm) square-notched design (Note the open time of the mortar). To better understand this modified vs. unmodified thinset talk, you might want to know the “behind the scenes” of this mortar blend and how modified thinset came to life. The TCNA is also a good resource. Lightweight Polymer-Modified Mortars. Lowes's must special order Mapei's Kerabound and that takes 2 weeks. Technical data sheet Download Safety Data Sheet. Diamond Tile Hole Saw Home / Diamond Holesaws & Corebits / Pro Bit Porcelain Diamond Hole Saws (1/8″ to 6″) by rtc. However, overall, the actual application process of these two products is fairly similar. Have a question? Additionally, there are dry-set mortars made especially for uncoupling membranes. However, modified thinset is an excellent choice for. Modified thinset needs air to cure appropriately; therefore, using it between two waterproof surfaces makes it difficult for it to set. Customer Support 800-272-8786. How much cement is in a thinset is the main factor that determines its strength. White Rodgers thermostats are the most common ones that people have in their homes. Since this membrane provides an impervious layer, it helps the unmodified thinset retain its moisture. It can’t be used where anything will be submerged underwater, for example, in swimming pools or ponds. Discover mapei mortar tile adhesive products from polymer modified to dry set mortars and latex additives. Most of the time, when you purchase thinset, you should be able to tell from the packaging if the thinset is modified or unmodified. It is used to bond cement backer board, porcelain tile, and ceramic. Modified vs. Unmodified Mortar With Kerdi Membranes Q: When installing stone tiles over Schluter's Kerdi waterproofing membrane, is it okay to use modified thinset mortar? For example, porcelain, which has taken a large share of the market, is very dense and has a low moisture-absorption rate. Ceramic tile mortar is an economical polymer enhanced mortar for setting ceramic tile and porous stone on floors and walls in a thin set method. The TCNA describes latex/polymer-modified mortar as a mixture of Portland cement, sand, and special latex/polymer additives and says it also is used as a bond coat for setting tile. The thinset mortar includes cement, a water-retaining agent as well as sand. Back in the days of the early 1900s, tile installers used a procedure known as the “full bed method.” Increased flexibility helps keep thinset from shrinking and expanding, which in turn prevents cracked tiles. Uncoupling Membrane Mortar. Explore the differences between modified vs. unmodified thinset, and then decide which one may be the right choice for your upcoming tile project. Kerabond is a premium-grade, dry-set mortar for use in interior/exterior residential and commercial floor and wall applications when mixed with water. The TCNA Handbook is the best all-around reference for all types of tile information, and the TCNA has technicians on hand who can help you choose the right thinset. Primers. Laticrete Strata Mat Uncoupling Membrane Roll. Thinset is a type of adhesive mortar often used to affix stone or tile to various surfaces, especially concrete or cement flooring. The ratio of these elements can differ, but all three are present in every thinset. It’s OK to use an unmodified if you are adhering Kerdi to hardibacker or drywall. The ongoing confidence in the performance of this product category is based on the known science of cement hydration and years of positive field experience. What is the difference between modified and unmodified thin-set mortar? Ditra is a polyethylene uncoupling underlayment with a grid ditra is an uncoupling membrane designed for ceramic and stone tile installations on floors. Unmodified thinset is the winner for waterproof applications and most floor installations using waterproof underlayments. MAPEI Ultralite™ Mortar Pro. Using dry-set mortar also avoids other minor problems, such as latex leaching into grout joints in wet areas, or the need to wait before grouting or walking on the tile.