The. BS8204 Part1. The next part of the process entails purchasing your vinyl flooring and adhesive product. Used for: levelling uneven subfloors, internally and externally, prior to laying ceramic tiles, thermoplastic tiles, lino, wood block flooring, or carpet. USE To level uneven internal subfloors to provide a smooth surface. Price Addition Info. Installing cement board won’t work, and if you choose to lay down a mortar bed it takes longer, it’s harder to achieve an even surface, and the screeding process can damage the heating. 9 How to Screed a. Start at a broken tile or between tiles where the grout has loosened. • For use with porcelain tile and over a wide range of floor surfaces when mixed with Polymer Additive (#13956) instead of water. Planning - Calculate the number of tiles - Setting out - Laying the vinyl tiles - After care. but you should always prime the subfloor first, I believe you need to give the bitumen a slurry coat first. ARDEX X 77 is ideal for use in swimming pools and fountains and over in-floor heating systems and is recommended for all tile sizes, including mosaics. Over the backs of ceramic tile, stone or brick before placing concrete or mortar during fabrication of ‘negative’ cast panels. Www. Most latex self levelling screeds can also be used to level floors from 1mm up to 10mm (but this will depend on manufacturer) and can also be used at greater thicknesses by adding some sharp sand to your mix. Coverage: 0. Search the floor for any loose or damaged tiles. If there is a significant trench where the grout is – fill it and seal it. Key features are: Longer working time compared to cement slurry. Old tiles adhesive should be removed anyway before laying the self levelling compound this because is the way a professional will do the job. Allowing the UFH system to cool down for at least 48 hours before tiling commences. e. USE To level uneven internal subfloors to provide a smooth surface. Screeding a floor is the simple act of applying a well blended mixture of Ordinary Portland Cement with graded agregates and water to a floor base, in order to form a sturdy sub-floor that is capable of taking on the final floor finish or act as a final wearing surface. Wait overnight for the grout to set. Clean existing tile by scrubbing and washing with stiff bristle brush and detergent. Sanding is a technique where you primarily use sandpaper to grind down a wooden floor. Labour costs. Without seeing the rh% of moisture in the sub-floor it's impossible to give 100% correct information, but as long as the rh% is under 97% you could prime the floor, use a latex based screed to give a smooth surface, use a surface DPM (as far as i'm aware only Ardex DPM 1 C is guaranteed over a sub-floor without a working mechanical dpm) then finally. Hooe this helps. application of a screed on a floor background. How to Install Sheet Vinyl Flooring Over Tile. Self levelling screedIn wet areas, Nitotile GP from m/s Fosroc shall be used as ceramic tile adhesive. Self-leveling underlayment is a great choice under any tiled floor, but it’s the absolute best choice when installing tile over an in-floor heating system. Remove any broken pieces. A primer is a liquid product, which can be either latex, epoxy or polyurethane based, and is used to create better adhesion onto the substrate before tiling or screeding. Liquid Screed is either a cement-based compound or anhydrite (gypsum based). There is no additional water, just pour the. Thirdly, paint again with the liquid DPM and let that dry. 2. Then, dry-lay tiles 2 to 45, making sure that gaps 11 and 51 were even. What type of thin-set mortar should I use when installing ceramic and stone tile over Schluter™-KERDI? Schluter-Systems requires the use of Schluter SET™, ALL-SET™, FAST-SET™, or an unmodified thin-set mortar meeting the requirements of ANSI A118. N. 3. SikaCeram® StarGrout Epoxy based grout for joints from 1 to 15 mm width. Used to smooth and level floors in preparation for laying a wide range of floor coverings on top which is important as this base layer will effect the overall finish you get from the project. Color: Gray. Because concrete has the potential to hit very high strengths, it is used across the construction industry for. SikaCeram® Sealing Membrane W Flexible sealing and decoupling membrane used for waterproofing walls and floors under tiles in wet rooms. FAQ. Discussion in 'Subfloor Preparation' started by SandyFloor, May 30, 2011. 8 Mpa). Then mix a lighter, creamy batch and wash over. LATAPOXY® 310 Stone Adhesive. I would assume that. With an average labour cost of £11 per square metre, we arrive at a screed floor cost of £26. 4-6mm would be fine. Priming becomes even more of a necessity once you consider the amount of dirt, plaster, adhesive, and various. Keep going until you’ve shifted the entire mountain atleast 3 times. quarry, ceramic and most natural stone tiles* over interior or exterior concrete and masonry floor and wall surfaces. Funnily enough Celotex do say you can float ply over their insulation boards and tile onto it, but they seem to assume that ply comes perfectly flat and don't have any recommendations as to how to get it all nice and rigid. It can be confusing because many leveling compounds are marked as useable on a variety of surfaces, including linoleum and vinyl. There are three main types of screed – bonded, unbonded and floating. com. Measurements shall be made to thenearest0. The thinset that was applied to glue down the tiles, has been applied over a dirty surface and instead of adhering to the substrate, it adhered to the dust and oils sitting on top of it. pnfl. MAPEI Technical Notebook(s): 1. Use long strokes and hold the trowel at a consistent angle. The first thing to consider is the condition of your ceramic tiles. None of those apply to wall tiles, and the reduced weight of a thinner tile makes for easier installation. Use painter’s tape in combination with a drop cloth or plastic sheeting to protect nearby surfaces from errant paint. • When mixed with water, suitable for ceramic tile, quarry, pavers and saltillo tile over cementitious surfaces. Flowcrete UK’s range of Isocrete Self Levelling Screeds offer numerous advantages for both new build and refurbishment projects. Work the chisel under the tiles, forcing them loose. There are many advantages in placing vinyl flooring over existing flooring, such as added insulation, desired thickness and with the use of transition strips you can avoid any unnecessary disasters with the installation. New-build install: £120 to £135 per square metre. If another coat is needed, apply at right angles to the first coat. hope this helps . Its consistency makes it particularly suitable for fixing large tiles and those with profiled backs. £10 - £12. Andy O'Hara. Needs mixing with a. simple answer is no, this is mainly down to the adhesive failing underneath. Just make sure the tiles are solid. Yes prime the latex then fix tiles using a flexible cement based adhesive . Tiles with ribbed or keyed back profiles should also be back-buttered to ensure complete coverage. The mixed adhesive shall be applied over the protection screed to a thickness of 3mm up to 1 sqm at a time. Put units in over the top of existing lino, but then afterwards cut out the existing vinyl floor that is left exposed and. Many modern mastics are latex, or water-based, and can be softened with water. When laying vinyl, ceramic tiles, carpet and other floor coverings. 5 millimeters (about 3/8 inch) and typically float over the subfloor. Hi Fred. Check out our website and and contact us for more information. When laying vinyl, ceramic tiles, carpet and other floor coverings. If the layer of screed is bad and the Tile is cut improperly, it will result in cracking in the long run. 4 - Ceramic tile detached from a crumbly screed. Slide the tile at right angles to the notch pattern to ensure maximum coverage on the back of the tile. I've had three lots of advice, to rip up the existing tiles and start from scratch, to screed over the tiles and lay the vinyl, or to ply over the tiles and lay the vinyl. The second batch was slightly more watery but it has solved the problem of the dip. 4 Screed. Around £12 I remember but will probably be way too much quantity for your small area butafter removing existing tiles or where bricks/blocks are uneven. Kent. You can latex over ceramic tiles no problem as long as you use the correct primer. These unique properties ensure that Arditex NA can be used with confidence over almost all sub-floors and without priming, including ceramic tiles. Roll the primer onto the tile, being careful not to press too hard on the roller. On ceramics I would go ardex na balls 1200 or a flexy screed 95 % of the time I go with a good coat of level flex ( balls 700 say you cant use on ceramics ) then a nice buff off and then a coat of balls 500 micro then lvt stuck in f46 ps. 5-6. a solution that binds, regulates and fosters air flow in the base you’re going to apply. Mixing and application of Nitotile GP shall be as follows; 20kg of Nitotile GP shall be mixed with 4. Latex screed. That will stop any raising damp to your vinyl. ARDEX K 15®. On absorbent surfaces, such as cement and sand screeds, it may be necessary to damp down the surface with water before applying ARDITEX NA ® , to help reduce suction and pinholes. Wait a few minutes. 2 Step 2: Cut Tiles With a Wet Saw: 6. Essentially you use the tip of your shovel to knead the mixture. 1 Ceramic tiles, porcelain tiles, and cement terrazzo must be firmly bonded, clean, and free of dust, dirt, oil, grease, paint, wax, sealer, soap, and any other substance that may prevent or reduce. ball & young stopgap 128 latex liquid, mixed with f. If you have a 300mm of depth, you might want to put in 225mm of insulation. Alternatively, another option is to strengthen the substrate with either a layer of floor screed or by overboarding with plywood/tile backer board, and then using an. Allow the tiles to dry. Screed: 20 mm over 3 m . (19 mm) Thickness) Typical Mix Ratio: 5. 322. Compound. Unit Size Available: 20kg Powder 4. 0. You can paint over any blemishes or missed spots that. Installing a damp proof underlay for concrete floors. Screed, float and level from 1/4" to 3" (6 mm to 7. It is probably a low content, eg. Professionals often prefer using the 2-part compound since it provides faster results and has a shorter. This has to be absolutely smooth for it to work, though. Maximum gap measured with a slip gauge. Like 1. Fibreglass * Prime. Any difference in levels at the doorway can be. footprints and trowel marks. I'm looking to lay Karndean tiles on top of these tiles (not going to take them up or deal with the bitumen) and would like some advice on how to prep the old tiles. Not all primers cure the bitumen i would recomend a 131 primer before u laytex. 3. The new flooring will be loose laid cushionfloor. Discussion in 'Subfloor Preparation' started by bournemouth, Oct 31, 2011. I would recommend F-Balls products. Product calculators. CS Flooring. 0. 5%. mortar. #1 Hi All, I have a job to do for a contractor and they have told me to self level over the top of existing floor tiles and then lay the new ceramics. When the sheets are secure, spread thinset mortar on the seams, cover it with fiberglass cementboard joint tape and trowel another layer of thinset on top of the tape as if you were taping drywall seams. Suitable for both internal and external, thin bed applications. Arditex NA 25Kg Subfloor Two Part Self Levelling Compound is a self-smoothing, protein free, latex levelling compound with improved flow and excellent adhesion, flexibility and moisture resistance. Category: How To Guides. Neutral-curing silicone sealant. Supplies. Step 4. Remove the painter’s tape to reveal a straight even edge. Perfect for using over ceramics. the concrete or sand/cement screed should. Step 4: Mix Mortar. Rich mixed up a 5 gallon bucket according to the directions and let it slake for 5 minutes before mixing it again. co. 1. Tile adhesive is often used on large wall tiles to ensure they stay put once installed. They only recommend pouring concrete over existing tiles if they are in sound condition and firmly affixed. LVT is warmer underfoot than tiles anyway so you’d probably not notice the difference that it will make for heat travelling, any cold spots will probably feel warmer too. Ultraplan Renovation Screed 3240 is suitable where good resistance to loads is required, also for castor wheel traffic and underfloor and undertile heating systems. 2. Screed floor leveler over low areas using a 2×4. Advantages. 8: Terrazo paving: 0. 211 POWDER is a cement-based powder designed for use with various latex admixtures to produce a high performing smoothing compound or high strength adhesive for ceramic tile and stone. NOTE: Arditex NA should not be used on top of vinyl. Last edited: May 23, 2012. Apply as a bonded, unbonded or floating screed. A38 is an engineered screed system based on a specialised cement powder and separate sand-aggregate mix. Before applying a floor covering, Setcrete Latex should be left uncovered for 24 hours when applied at 2-5mm thickness. USE To level uneven internal subfloors to provide a smooth surface. Skill Level: Intermediate. In Swimming Pools. Floor levelling compound is also known as self-levelling compound. Q. Answered 5th Apr 2021. Many screeding products, like Instarmac’s UltraFloor Screed-IT, set rapidly. Thicker substrates require 2 days per mm. ARDEX Screeds will pass a BRE Screed test in as little as 6 hours, rather than 2 weeks with conventional screeds. 2 litres of water with a slow speed drill. I was charged £2,600 and although I knew this was expensive I put. Country. BASF, the leading latex supplier in waterproofing industry, provides comprehensive solutions for cementitious waterproofing, mastic waterproofing. - Assuming the screed has completely gone off (say 2 to 3 weeks) and I lay the compound, how long after this can I tile. The tiles are placed in the wet slurry and “beat-in” with a rubber mallet. Over time, an increase in stress build-up will make the tiles more likely to pop. SikaCeram®-260 StarFlex Deformable tile adhesive with lightweight fillers. . 105 mm. As a result, bigger tiles require flatter floors. Iam a floor layer with 25 five years experience. See, if it were me, and fitting ply over it, I would fix a 16mm batten all the way along the low edge, fill the lot with cement mortar. If there is a significant trench where the grout is – fill it and seal it. Bonded. SR3 10mm. Get ideas for concr. This will provide a dense surface to tile onto and will aid drying. Ordering and Purchasing. They come in thicknesses ranging from 2 millimeters (about 1/16 inch) to 8. Use a 3/4- or 1-in. any good floor layer will be able to screed out a 5mm dip in your. 7m. Suitable for use on concrete, cement:sand screeds, ceramic/quarry tile/terrazzo/hard natural stone, plywood overlay, vinyl tiles/sheet, mastic asphalt. they will 99% of the time be a very poor strength compound. LVTs like Karndean Amtico Moduleo etc yes. The maximum screed thickness when using sand and cement screed, as such there isn’t one, as long as the screed has been compacted in layers then 100, 200, 300mm is possible. With the existing tiles removed you're removing the risk of the screed failing. A. If a dipping grade adhesive is not wanted, then the trowel applied Styccobond B95 adhesive can be used instead. The short answer is yes, self-levelling compound can be used over ceramic tiles, but there are a few important things to consider before starting your project. For larger tiles made of either ceramic or porcelain it is important to get the most effective adhesive on the market. #2. Before you tackle how to tile an uneven floor, it’s really important to use a good primer i. used with confidence over almost all subfloors without priming, including ceramic tiles, bitumen and flooring grade plywood. 5 litres per 20kg bag of screed. ARDEX K 40™ RAPID. Measure the gap between the floor and the raised end to check how far out the floor is. Suitable to receive floor coverings after 4 hours. Asbestos was added to the mastic for its. Apply a screed on the concrete. Bonded Screed Minimum Depth. Under ‘wet’ consistency toppings/overlays; 4. Another tradesman said they could do it without screeding because they are. Using chalk or a pencil, mark low and high points and check again for any ridges or depressions you. A 'self levelling screed' is a generic term given to a group of products which are used to create smooth floors prior to the installation of the floor covering. Screw the sheets to the subfloor, using rust-resistant screws and spacing them 6 inches apart. 5 Step 5: Comb Gently: 6. To flash the floor, the guys are using Kerabond mortar with Keralastic latex additive because it bonds so well. 1 mm. Work the chisel between the tiles and the concrete, hammering them up with a 2-lb. With a floor leveling compound, the smooth subsurface is easy to create. There are two types of screeds - Bonded and Unbonded. There are vinyls which let your floor breathe like Altro expresslay but as you have already got your vinyl then one way of doing it to be safe from raising moisture is -. You can then lay your new floor on top. 5m and need to be about 65mm thick. ceramic tiles, porcelain tiles, flooring grade asphalt, quarry tiles (sealed) and vinyl. Go to product. Maximum depths are around 10-15mm, however with the addition of bulking aggregates (normally kiln dried sand) some latex floor screed can go up to 30mm. The best solution is to uplift the tiles and dispose of accordingly, then use a specialist screed such as F-Ball Stopgap 1200 straight over the bitumen. Latex screeds are self-leveling compounds usually consisting of a powder and liquid latex. ” Note: New Tile Installed Over Existing Tile - When new tile is needed in existing pools, new tile can be installed over existing tile using 254 Platinum or 254 Platinum Plus provided that the pool is in good condition and existing tile is well bonded. Using the notched side of the trowel, comb the mortar to produce an even surface. you risk voiding the warranty of the flooring by not installing on a dust free, flat smooth surface. Grind Down The Levels. Finally, allow the floor to dry naturally to avoid cracking. 1 – Step 1: Prepare the surface. Tilemaster Pro Flow can be applied from depths of. Discard any material that has exceeded the pot life or working time of the product. 16 Aug 2013. 20 -25 min Working . Finally, allow the latex to sit and dry for up to 24 hours. However, unevenness over 0. One of those options is a new layer of ceramic tile. It can be applied to Stopgap levelling compounds, structurally sound, smooth, dry, absorbent subfloors of concrete and sand/cement screed and plywood (minimum 6mm flooring grade). Mapei prim grip is the grey primer. 3 Jul 2007. Be careful of latex compounds that say they can go over ceramics with no primer. However, the Quikrete High-Performance. bournemouth Super Moderator. I've gone over vinyl tiles with green bag and 300 and got away with it. Laitance must be removed by sanding using a rotary floor sanding machine and this should be carried out between 7 and 10 days after the screed has been poured. Green screeds are usually 1:3 or 1:4 cement and sand at a usual thickness of 50mm. Checkatrade offers the following guide: Electric underfloor heating cost. Use your steel trowel and work the compound in sections, following up with a spiked roller to make sure there aren’t any air bubbles. For a full flooring renovation, hacking is required to remove the existing tiles. Search the floor for any loose or damaged tiles. Use before application of polymer-modified mortars over properly prepared sound, stable and nonabsorbent substrates including ceramic tile, natural-stone floors, glass tile, cement terrazzo, cement-based agglomerates, glazed cement masonry units, VCT, rigid fiberglass, well-bonded old cutback adhesive, floor-covering adhesive residue, 13 Aug 2020. The glaze can often act as bond breaker and is a difficult surface for anything to adhere to. nThis floor screed is a versatile smoothing compound for levelling uneven floors before laying decorative floor coverings. you cant put the dpm directly on to the. A proper floor fitting will screed over tiles and lay karndean but I have no idea whether it would render underfloor heating useless. A “floating” screed is an unbonded screed applied over a layer of thermal insulating material, such as expanded polystyrene or polyurethane panels (Fig. steve have you checked the level of all of the concrete floor. Country. Cheers vman, Mar 3, 2012 #1. Cleaning the debris: Soak a cloth in clear water and wipe any dust or debris off the plywood surface. You can test the floor dryness with a gloved. e. LATAPOXY 300 Adhesive is a chemical resistant, epoxy adhesive that will bond to most sound, clean surfaces. co. Cover the floor in plastic sheeting. • Before tiling, the screed should be clean, free of laitance and other surface contaminants. As it might sound, a bonded screed is applied directly to the. VAT. e. Remove cork tiles and then screed over concrete and remaining quarry tile/ cork. they will 99% of the time be a very poor strength compound. Coverage: Approx 6 m at 3 mm thickness. Floor leveling or screeding – necessary if concrete cannot be designed and. #1 hi all. Apply the mixture to the floor, and use a floor brush to scrub the floors. Too much extra will probably make it useless. 6. Didn't blow but cracked big time The first thing to consider is the condition of the ceramic tiles. oogzy Member. I've just laid a latex screed over electric matt underfloor heating (about 8-10 mm). For example, 12 is not a prime number because it can be divided by, 1, (to give the answer 12), 2 (to give 6), 3 (to give 4), 6 (to give 2) and 12 (to give 1). 5 Ltr. Can be used with underfloor heating systems. Not actually used it myself (yet) but looking to level my garage floor so done a little research. Alternatively, you can also grind down the uneven concrete flooring by using other tools or sandpaper. If your tiles are loose, cracked, or broken, you will need to repair or replace them before applying self-levelling. Last edited: Sep 2, 2010. Hope this helps, Chris M-W. Designed for use with various latex admixtures to produce a high strength smoothing compound or adhesive for ceramic tile and stone that meets and exceeds the requirements international standards. from 1-2 1/2 in (25-65 mm) mixed to a semi-dry consistency and placed over a latex/cement slurry bond coat, leveled between screeding boards and thoroughly compacted. To be confident you’re starting with a flat, smooth surface, you should render the walls and screed the base. Davco DW 1 is a synthetic, latex based mortar additive designed for use with portland cement and sand to prepare high strength, thin set mortars. Self-leveling underlayment is a great choice under any tiled floor, but it’s the absolute best choice when installing tile over an in-floor heating system. They made it an entirely new house! As is super common here in south Texas, the house had large ceramic tile flooring installed throughout. Before tilling, ensure that. The tiles will also stick to ceramic tiles if they are untextured. Add 2 litres of the combined liquid per 20kg of screed and use your drill mixer on low speed to blend until it is smooth. Adding a little extra water to a thick mix can make it spread easier, might increase drying time slightly. Before laying self levelling screed, its suitability needs to be determined. We had the tiles tested and they definitely contain asbestos. and the screeding process can damage the heating cables or mats. Step 5. Also use for interior applications over exterior-grade plywood. Ideal for fast-track tiling, ARDEX AM 100 is ready to receive tiles after just 2 hours, regardless of thickness. 2. Fast Setting Screeds Allow a faster setting time to achieve foot traffic within a shorter period. Volume. Sandwiching will give you a nice flat surface and also eradicate any water vapour coming up through the screed and ruining your flooring. This time I mixed more screed and poured it over the area in question. our kitchen floor is ceramic tiles which are pretty old now and have lots of chips in them, making it look horrible and dirty all the time. Removing the laitance by sanding to provide a key for the primer and/or adhesive. pnfl. 3. The latex screed has cracked in multiple places and if I press hard with my foot, I'm not certain, but I think I see slight verticle. Carolann's carpets. What is screed and what is it used for in wood flooring installation? Screed is a term used to describe the finish that is put on a concrete floor to make it level and stable. Screwfix customers rate this product 4. Use latex screed. e. Arditex NA is a premium latex screed. Ideal for installing ceramic tiles, marble, slate and natural stone onto concrete, cement render, rendered brickwork surfaces or over existing tiles. 4 Use a screed to level the. 16 January 2007 at 11:38AM in In my home (includes DIY) MoneySaving. Suitable for use with underfloor heating and for encapsulating electric cable undertile heating systems. Mapei MAPEGUARD UM 35 can be installed over the top of a screed using a suitable Mapei adhesive such as KERAQUICK S1Mapei or Mapei ULTRALITE RAPID FLEX S1, for waterproofing and antifracture properties. Maximum gap measured with a slip gauge. Wickes have a very good product, Latex self levelling screed, goes hard in about and hour or two and only need to leave it 24hours before applying new floor. As the title says, looking for a good primer and screed to go over quite shiny ceramic tiles. If flooring is applied directly over the ‘young screed’ there is a risk of development of moisture related de-bonding of the adhesive and blisters in the vinyl or coating. 2-m straightedge laid in contact with the screed. 4. 2. 27kg ARDEX A 29 cement per m² for each millimetre of screed thickness using a 1:7 mix. Reaction score. Decorative floor coverings can be installed after 4 hours and ceramic tiles can be applied after 3 hours. 1. Latex floor screed is the ideal solution for levelling uneven floors and preparing surfaces for the application of floor coverings such as carpet, vinyl and ceramic floor tiles. With the existing tiles removed you're removing the risk of the screed failing. 1. commences. If u dont use the right primer the floor screed will blow under nieth eney flooring. When ARDEX Americas started back in 1978, we began a tradition of innovation and excellence as we introduced the first self-leveling cement product available in the market. The mortar has an open time (work-able time) of about 1 hour. Estimated Cost: $75 to $100. The correct way to this job would be to lift all the floor tiles, lay marine plyboard down and secure it with screws. 2-2012 – Waterproofing membranes for external above-ground use – Part 2: Design and installation B. Latermix Cem Classic and Maxi are no fine screeds based on expanded clay LWA and are quick drying even in high depth. Apply a second coat evenly (if required). latex floor screed is a cement-based smoothing compound. Step 1 – Fill Large Grout Lines. 5 mm must be completely compensated. The screeds primary purpose, using one part cement to three to five parts sharp sand, is to give a smooth and level floor on which to lay your chosen floor finish. 9. What's the best latex / screed to cover ceramic tiles Andy O'Hara Peter Newman Flooring Www. My kitchen floor is part bare concrete and part quarry tile with cork tiles stuck on top. In warm and well ventilated drying conditions allow 1 day per millimetre up to 40mm in thickness, so 40 days if 40mm. commences. over ‘semi-dry’ consistency traditional mortar beds before placing ceramic tile, stone or thin brick. Alternatively, you can use a flat shovel or a floor scraper. L. With the hole closed up, you can start “folding” the mix. If the existing concrete is dirty you will have to use some self-levelling compound which includes latex. Prepping the Substrate for Tile Recap. Discussion in 'Builders' Talk' started by oogzy, Nov 3, 2005.