Thinset mortar is commonly used for setting ceramic tile. Hollow spots under tile are to be avoided, as are humps in the floor. Mortar Mix Problems . Use the flat side of the trowel to get an even coat of mortar filling all the spaces in the surface of the tile. Tiles are weight sensitive. So round up the number to the next even number, which is 3. Do not swirl it around. I'm putting 6x6 porcelain tiles on the wall inside the tub/shower area, 12x12 porcelain tiles outside of the tub/shower area and 12x24 porcelain tiles on the floor. I have experience as a brick mason and some floor covering but am not sure in this area. Try dropping the tile in butted up to the two adjacent tiles and sliding them out to the proper grout spacing. You don't become a tile installer or a business owner overnight. Use a trowel that will help you achieve a continuous minimum 3/32” coverage. At a large thickness of the layer, a strong shrinkage occurs. Your couch is probably that one place you sit most during your whole day. There should, however, be small groves in the thin-set. In this section, we answer three questions. Let's focus then on how to properly apply the mortar. If you decide to go with the tiles sizing 8 feet, then the amount will be 192÷8 = 24. It seems all the mortar elevations will differ if I strictly follow the trowel recommendations. It is not used in powder form, but as granules to provide a high amount of force in a short period of time. I am placing 12X12 ceramic mat tiles on the ceiling and surround of my bath tub. I am going to tile a 23ftsq entry with 3 tile sizes: 18" x 18", 12" x 12", and a mosaic border. What function do thin set and large and heavy tile mortars serve? It takes time, enthusiasm, pride, reliability, respectfulness, a willingness to learn, and dedication. It's so critical that readers like you have made this CTEF Blog article the one with the highest readership since we originally published it on June 7, 2016. Today we use the ceramic or other types of tile and mortar to place them accurately. I'm using 1/4 x 1/4x 1/4 vesabond mortar but I can't the consistency right. Place the tile into the freshly spread mortar, moving the tile back and forth in a perpendicular direction to the trowel ridges. The trowel notch recommendations come from the tile and mortar manufacturers and are used as a general guideline for tile installation. To determine if the trowel you selected will work effectively for both the 18” and 12” tiles, follow the techniques in the NTCA Trowel and Error video embedded above in this article. Thank you, Bill. On the other hand, the spades are the tools that help the mortar to spread evenly. The mortar should be fairly thick, like thick peanut butter. Any ideas on how to fix this? A number of trowel-able and pourable tile underlayment options are available, each with its own purpose and best use. Make sure you select the appropriate trowel type and notch size. Move the tile only in one direction, perpendicular to the ridges, without moving in the opposite direction or twisting the tile. This is the size of the room you will be working on. Twist the tile slightly as you set it to create a strong bond between the mortar and tile. They used to make the tiles out of the mud and dry it in the sunlight. That is why you are getting excessive amounts of squeeze out. Rather do it with maths to save you a lot of time and keep you safe from the hassles. How to Remove an Old Tile Mortar Bed. Had a hell of a time spreading it so today I made it more like a paste. Applying the mortar to the back of the tile eliminates this crucial component of first quality tile installations. Installers who stay away from the chalk line to eliminate having mortar squeeze up in the grout joints leave dangerous voids which can result in catastrophic failure, especially in areas subject to high heels, point loads such as pallet jacks, pianos or a refrigerator. Neither the tile nor the substrate should be missing mortar. If you change the direction of the troweling to horizontal (left to right), you would move the tile up and down, thereby eliminating the problem. Homeowner's Guide to Hiring Qualified Tile Installers, Understanding and Installing Ceramic Tile, Fundamentals of Thin-Bed Knowledge (FTBK), How To Select the Right Trowel Notch To Obtain the Required Mortar Coverage. This allows better air release from under the tile since the air travels a much shorter distance when you bed the tile. The tile is porcelain. Always read and carefully follow the directions on the bag which includes measuring the amount of water added to the bucket before the powder is added. Discussion Starter • #1 • Aug 20, 2013. Applying the wrong grout. The tile industry does not recommend using a v-notch trowel for tile installation since the high points of mortar do not provide adequate mortar to meet the industry mortar coverage requirement is 80% in dry areas and 95% in wet areas. When laying out the mortar and using the trowel, should you be going all the way down and removing the mortar to the floor when creating the ridges? Be careful not to leave any voids along chalk lines or between tiles. Black powder is employed for this purpose. Furthermore, they assist with air removal to maximize mortar coverage and ensure a strong bond to the tile and substrate. This mortar bed is important but it is not a substitute of the tile adhesive, which main purpose is to fill voids and provide a workable level surface. >> See Have You Snapped a Chalk Line for Your Tile Layout? So, to determine a room size, you need to multiply the size of the longest wall with the size of the shortest wall of the space. In the early time, they used to decorate the room or the houses with the tile, and till today, we do the same thing. The installer in this case had been placing tile for a grand total of three weeks. The end tiles are cut to fit the ends, so there is no room to move them and collapse the ridges. This means, just divide the square feet area size with the tile size to get the amount of the tiles to cover the area. Can I apply the thinset directly to the tile or should it always be applied to the wall? Save my name, email, and website in this browser for the next time I comment. Conversely, other types of backer board will not allow any additional moisture to … The terms thinset cement, thinset mortar, dryset mortar, and drybond mortar are synonymous. The minimum layer of glue for a small tile is about 1.5-2 mm, and for a large-size glue – 4-5 mm. The bigger the tile and the spade goes, the larger the amount of mortar becomes. Using extra strength thin set with adhesive milk to help make it stay stronger on the ceiling. The area of the space will determine the amount of the tiles, and the tiles size and amount will determine the mortar amount. Not a good situation for the customer and a terrible one for everyone involved in installing tile correctly. No two jobs are the same; each one has its own unique nuances. Porcelain tiles, in particular, can withstand extra heavy service conditions by taking a lot of impact or point load (think of high heel shoes, pianos, refrigerators or pallet jacks) when installed correctly over a sound substrate. So what happens to the end tiles where there is no room to move the tile left & right perpendicular to the ridges? hbspt.cta._relativeUrls=true;hbspt.cta.load(2048756, 'e6af8fe3-7605-4772-a9ef-35efbccfc1f8', {}); Note: This article was originally published on June 7, 2016, tweaked in 2018, and further updated here. According to the TCNA Handbook and ANSI Specifications, the backer board must be a minimum thickness of ½”, so the already installed ¼” backer board must be removed. Glass mosaics are very thin, mounted on front-placed plastic or mesh backing; they do not install correctly when too much thinset is applied. Expert tile-setters recommend a 1/8-inch V-notch trowel thinset application in even strokes for installing glass mosaic tiles. Bookmark the permalink. Add more mortar, move the notched side of the trowel in one direction which creates straight mortar ridges. Too strong a mix, i.e made with too much cement and your mortar may dry too quickly, shrink and crack. Calculating the mortar amount can go through a process, or you can round up the whole scenario in a method. Lift charge Edit From PyroGuide Edit. In short, if you choose the 12 feet tiles, then you need to get more mortar than the amount of choosing the 8 feet tiles. All edges must also be supported which may require that blocking be added in between the joists or trusses. Some backer boards are more absorptive than others and will require that it be dampened prior to spreading the mortar, expecially in hot and dry environments. Also visit The Tile Installation Experience with Scott Carothers at Coverings. The Tile Installation Experience with Scott Carothers at Coverings, [fa icon="caret-right"] Training & Certifications, [fa icon="caret-right"] Dealer/Distributor Resources. To remodel a shower or other tiled feature within a home, it may be necessary to first demolish an existing tile surface and the underlying mortar, or mud, bed. And after that, with time and the development of technology, the tile has got a different look. If you mix up too much mortar, it could start to skin over and become less effective. A bag of 50-pound mortar can cover up a space of 95 square feet. Also, if too much water is added to the mix, it affects the chemical composition of the mortar, reducing its strength and potentially causing problems in the future. Then apply a small amount of mortar along the flat side of the trowel and move it perpendicularly to the ridges which will knock them down into the valleys creating a flat mortar surface. The bigger the tile and the spade goes, the larger the amount of mortar becomes. Corona Marble and Tile, Joseph Lundgren Consulting In the News Blog. But what is the perfect amount of mortar to make the tiles stick evenly? Questions from Readers about Troweling Mortar Correctly. The tile store folks say to use a 1/2" notched trowel to spread the thinset motar under the tile to the cement board and a 1/4" notched trowel for the thinset under the cement to the plywood. Since publishing this article in 2016, we have received many questions that we answer below. 251 Posts . Next, apply a small amount of mortar along the flat side of the trowel and move it perpendicularly to the ridges which will knock them down into the valleys creating a flat mortar surface. Now that the underlayment is in place, the next step is attaching it to the subfloor. The short answer is that you would change the direction of your troweled mortar. Using a notch which is too small will not allow enough mortar to be applied and likewise will not adequately support the tile. Material & Supply Calculator . When the mortar isn't properly troweled, it creates unsupported space under the tiles which become weak spots that can be easily damaged by the same impact or heavy loads. It is important to understand that once the mix starts to set, it cannot be re-mixed because it will reduce the mortar's strength. Position the tile over the mortar bed and press it in place. When installing glass mosaics, excess thinset will bleed through the grout lines and create a disjointed, uneven tile project mess. If you have a kid, you probably already know how important it is to clean and disinfect baby toys. Mortars are the substance that is used to hold up the tiles in the place. Are you ready to correctly trowel the mortar on your next tile installation job? Hollow spots under tile are to be avoided as are humps in the floor. The thickness and consistency of the initial mix should be the same consistency of the final mix. Bill, Thank you for your question which raises several very important requirements for tile installed on a ceiling, especially when installed in a wet area. Tile installation setting tile into the valleys as you can cover up your room of 192 square,... 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