MAPEI Technical Notebook(s): 1. 5 millimeters (about 3/8 inch) and. 2-m straightedge laid in contact with the screed. However, unevenness over 0. TDS 192 . Next, clean the tiled floor: Vacuum or sweep them to remove the filth. Installation of Ceramic Tile in Swimming Pools,. Cement screed flooring Singapore: pros and cons. The correct way to this job would be to lift all the floor tiles, lay marine plyboard down and secure it with screws. 1 mm. Fig. 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. Primers. Latex screed. Green Screed. However the tiler should apply a Primer before screeding such as. 5/5. Suitable for fixing porcelain tiles and natural stone in interior locations to solid stable substrates such as concrete or sand: cement screed in small to medium sized installations. Without proper preparation and priming, you risk your tiles peeling up later due to poor conditions. any minor unevenness would be consumed by the underlay, getting the bitumen up is virtually i,possible and you can not lay levelling compound over it (I have done this before and it all cracked). Before laying self levelling screed, its suitability needs to be determined. Secondly, screed over it with a self leveling compound, and let that dry. Liquid Screed is either a cement-based compound or anhydrite (gypsum based). In most rooms, the tiles are still in place, in varying conditions. The purpose of a screed is to give a smooth and level floor surface on which to lay your chosen floor finish that could be vinyl, tiles, natural stone, carpet, parquet, wood and so on. Www. If there is a significant trench where the grout is – fill it and seal it. AS 3958. #1. Most projects will have one of three different types of substrate as follows: Construction TypesPalace Trade-Flex, Multi-Flex or Easi-Flex adhesives are all recommended for fixing over a prepared anhydrite screed and the use of a pourable thick bed adhesive with built-in polymer such as Palace Flexi-Set Thick Bed will be advantageous when fixing large format (600mm x 600mm) floor tiles. Product calculators. 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. Apply a second coat evenly (if required). Removing the tiles might give us a bit more room. I am hoping to cover it all with a vinyl sheet. Pour a small amount of bonding primer into a lined paint tray. screed to go off before laying the tiles, so I am guessing I should also wait the same time-frame before putting down the S. 0. Last edited: May 23, 2012. 5. Rapid, High Flow Self-Leveling Underlayment. if its in screed then you'll be fine and won't damage it, if its over the screed wire or mat then you'd be lucky to be able to get it up without damaging it. Scraping the screed over the newly applied self-leveling latex compound will help to spread it evenly over the floor, ensuring it fills up every dip. If the ceramics are bonded firmly to the floor you could apply primer (P131) and latex over the top. ceramics I don’t know. Use a level to check the floor. ceramic tiles, porcelain tiles, flooring grade asphalt, quarry tiles (sealed) and vinyl. A38 is an engineered screed system based on a specialised cement powder and separate sand-aggregate mix. 6 mm/m) can contribute to problems. These are available from most tile warehouses, builders merchants and screwfix New Vinyl Plank Flooring (Over Tile!) Now that I FINALLY have some decent current pics of the house since we moved in, I can share all about the luxury vinyl plank flooring we had put in right after we closed. As long as the old floor is in good condition and can allow the new mortar to stick properly, it should not be a problem. Measurements shall be made to thenearest0. That way if your kick boards are already fitted to the height of the ceramics there is no need to replace them. Just make sure the tiles are solid. Peter Newman Flooring. Immediately trowel back over the skim coat, using the notched side of the trowel to create a pattern of ridges and valleys in the wet adhesive. Hi, You can lay the carpet directly over the bitumen. 2. Kent. (19 mm) Thickness) Typical Mix Ratio: 5. Lay it over your floor and lift the low end until the bubble is central. With the application of DITRA matting, tile coverings. s1oww said: The area i need to cover over the tiles is 6m x 2. The level of residual humidity in a screed is measured using an electric or carbide hygrometer (Fig. Moisture testing to confirm the dryness of the screed before tiling commenced. Existing Vinyl Tiles * Steel/Metal Surfaces. ARDITEX NA can be applied on all common subfloors such as concreteStep 4: Mix Mortar. bournemouth Super Moderator. Total Product Weight. They come in thicknesses ranging from 2 millimeters (about 1/16 inch) to 8. Start at a broken tile or between tiles where the grout has loosened. Now mark, with a pencil or felt tip, the corner of tile 1, where it meets tiles 11, 12 and 13 onto the floor . maul. We get loads of sub floored Ashphalted as it’s great for a Dpm and building the levels up from parquet wood being taken up. Actual jobsite coverage may vary according to such factors as job conditions and application methods. Use a 3/4- or 1-in. Membrane. 1 Add a decoupling mat to the substrate. Wickes sell 'Setcrete Floor Leveling Primer' , which seal porous, dusty surfaces prior to pouring the levelling compound. I am hoping to cover it all with a vinyl sheet. A “floating” screed is an unbonded screed applied over a layer of thermal insulating material, such as expanded polystyrene or polyurethane panels (Fig. 8. Just to be sure you've seen my previous messages: I think the house was built in the 70s but may have been 60s; the tiles have been tested; we haven't had a professional look at the floor with the carpet etc removed but have had advice on "if the tiles are generally in. 9 Step 9: Allow Grout to Dry: 7 Tiling over Water Underfloor Heating, some helpful tips. tanking. 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. Many modern mastics are latex, or water-based, and can be softened with water. Work the chisel between the tiles and the concrete, hammering them up with a 2-lb. Only really suitable for domestic loose lay vinyl. Builders often refer to latex screed as a ‘levelling screed’ for this reason. 8: Terrazo paving: 0. The first step in any pool tiling installation is to evaluate the substrate and ensure it is flat enough to receive the tiles. Renovation property: £135 to £185 per square metre. i try to keep up on new products and a company called ardex uk make a latex based levelling compound called (arditex na)that goes straight over bitumen to seal it. This is because the latter generally reacts to external influences, such as temperature or humidity, with stronger expansion behaviour. That's the point. Professionals often prefer using the 2-part compound since it provides faster results and has a shorter. Mix a small batch of thick screed and in-fill where the tiles are missing. ARDEX A48 is a pre-bagged and mixed version of this material. 1-2007 – Ceramic Tiles; Part 1: Guide to the Installation of Ceramic Tiles 2. Installing a damp proof underlay for concrete floors. MAPEI recommends adding 5% to 10% in overage to ensure. If you’re working on a time-critical project, go for ARDEX A 38 Ultra Rapid Drying Screed. Fix or flatten the surface so it is tile ready. Discuss Advice for self-levelling over old tile adhesive, using Wickes latex? in the Tile Adhesive area at TilersForums. Over time, an increase in stress build-up will make the tiles more likely to pop. Yes you can latex over ceramic tiles as long as the tiles have been installed to a good standard and you have no damp plus you have to use floor primer. 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. According to British Standards, any deviations should not exceed 3mm when measured under a 2m straight edge. Mapei prim grip is the grey primer. 2 Step 2: Cut Tiles With a Wet Saw: 6. 1. They come in thicknesses ranging from 2 millimeters (about 1/16 inch) to 8. The Latermix Cem range of concretes can be used for base screeds that are strong and very lightweight (450 – 600 kg/m 3) and contribute significantly to the thermal insulation of the slab. 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. Laying carpet tiles over. Lee Allen New Member. 6N / mm2ARDITEX NA provides excellent adhesion to almost all substrates without the need to prime, including flooring-grade plywood, ceramic tiles, steel, and even over old bitumen adhesive residue. 30 Jan 2008. 322. Floating Floors. USE To level uneven internal subfloors to provide a smooth surface. As the title says, looking for a good primer and screed to go over quite shiny ceramic tiles. Application examples:The topic ‘Asbestos floor tiles’ is closed to new replies. . Dump or scoop the mortar onto the surface. Not all primers cure the bitumen i would recomend a 131 primer before u laytex. 27kg ARDEX A 29 cement per m² for each millimetre of screed thickness using a 1:7 mix. of the adhesive, screed and waterproofing compounds onto the surface. Screwfix Select. However, this product is not recommended as a final finish, but rather to provide an even subfloor for installation of your choice of final floor covering, whether this is tiles. Use clean water and a mop to wipe the floor (remove the detergent residue). the bottom line is no,the ceramics will show through in a few days this will result in short life expectency of the flooring,a suitable latex screed is needed to level out the ceramics then you can achieve a flat surface to recieve the floorcovering. I'm wondering if anyone can help me please? I've just bought a 70's house which has thermoplastic (Marley) tiles laid to the kitchen and utility. In addition to vinyl flooring, there are other options if you want to install the flooring directly over ceramic tile. Where the old screed has been removed by the outside back door, it has uncovered a low inner brick course running parallel to the door in line with the inner wall with a gulley either side, similar in dimensions to the one described above. latex floor screed levels out uneven substrates leave a smooth surface to bond to. 3 Jul 2007. 5 cm) thick for leveling and ramping. 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. Reaction score. Both terms are used interchangeably but floor covering refers more to loose-laid materials. Neutral-curing silicone sealant. Remove the painter’s tape to reveal a straight even edge. In 1986, a Field Report of the Ceramic Tile Institute of America (86-5-1) titled “Installing Ceramic Veneers with Latex Modified Mortar & Grouts” used the term “Latex Leaching. When laying vinyl, ceramic tiles, carpet and other floor coverings. You would question why you would want to go that deep with screed, and not use a void former. Pumped anhydrite floor screeds are not much dearer than ready-mix sand/cement, costing around £25/m3 (laid. At the same time i will be screeding over the main floor in the building, this is 7. “Attend to the water damage as soon as possible as water leaks will cause damp patches on the ceilings of rooms below the installation and this leads to peeling paint and costly repairs,” she says. g. Once the tiles are rumoved there will still be bitumen on the sub floor. Decoupling mats are also obligatory when laying tiles on an existing wooden floor. Granolithic screed - A specialised type of sand-cement + aggregate screed, where the sand is replaced by a sand-gravel mix with a size range of typically 0-4mm in most usages. Sanding is a technique where you primarily use sandpaper to grind down a wooden floor. Country. Discussion in 'Subfloor Preparation' started by SandyFloor, May 30, 2011. The asphalt content lends mastic its black color. screeds to dry out to some extent prior to installation of ceramic tile finish 1. Screeding over cracked tiles can cause pressure over time on the screed and begin to break it up in the affected areas underneath. Please help !!! I've had a 4mm-5mm latex screed laid using mapei renovation screed as I was advised this was the best option for a final floor finish as I was only left with about 7-8mm to work with as a microcement floor I had laid had gone wrong. 8 Step 8: Grouting: 6. However, I contacted a specialist anyway, and we are looking at £400 + VAT to remove the tiles. Whilst it is still poured at a shallower depth than traditional sand and cement screed, the minimum 35mm pour is. screed over insulation. ARDEX Screeds will pass a BRE Screed test in as little as 6 hours, rather than 2 weeks with conventional screeds. I did end up hacking up the tiles, the self-levelling compound came up too! My builder refused to take any responsibility. Screwfix Select. hand maul. #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. Over the backs of ceramic tile, stone or brick before placing concrete or mortar during fabrication of ‘negative’ cast panels. Ideal for installing ceramic tiles, marble, slate and natural stone onto concrete, cement render, rendered brickwork surfaces or over existing tiles. The tiler can then latex or screed over the DPM. Apply a coat of surface liquid DPM to the tiles like Ardex DPM 1c or stopgap F77 then prime and screed. Bonded Screed Minimum Depth. 1 – Step 1: Prepare the surface. III. 3. Replace the grout in the lines using a grout float to push the grout into place. Both are correct, and have their various uses. • For use with porcelain tile and over a wide range of floor surfaces when mixed with Polymer Additive (#13956) instead of water. Resilient floorcoverings can be installed after just 4 hours and ceramic tiles in as little as 3 hours. used with confidence over almost all subfloors without priming, including ceramic tiles, bitumen and flooring grade plywood. PT Flooring Specialists. Ceramic tiles: 3-5 days : 50-70mm: Carpet: 6. Laying ceramic tiles by Semi-Dry Mix Method. Rip the whole existing lino up before I put the kitchen units in, put the units directly on the quarry tiles, and then get the lino put in afterwards - I have no idea what the state of the quarry tiles is currently. #2. The mortar has an open time (work-able time) of about 1 hour. SR1 3mm. USE To level uneven internal subfloors to provide a smooth surface. Working Time: 6 - 7 hrs. Contents [ hide] 1 Tiling over a waterproofing membrane, some helpful tips: 2 Decoupling mat floor tiling, some helpful tips: 2. 2 Check for hollow tiles. SR2 5mmMAPEI. Thirdly, paint again with the liquid DPM and let that dry. What's the best latex / screed to cover ceramic tiles Andy O'Hara Peter Newman Flooring Www. bournemouth Super Moderator. Now in addition to our subfloor preparations products, we offer a full range of patching systems, moisture control, concrete toppings, flooring adhesives and concrete repair. The floor leveler will fill in previous grout lines and make the floor level for the tile over tile application. Before you tackle how to tile an uneven floor, it’s really important to use a good primer i. Most in screed UFH is water based and pumped so theres a very good changes its over screed. Primer for floor preparation prior to tiling. 37 mm thick screeding: 0. Step 1 – Fill Large Grout Lines. Needs mixing with a. There are two types of screeds - Bonded and Unbonded. Color: Gray. PT Flooring Specialists. Sandwiching will give you a nice flat surface and also eradicate any water vapour coming up through the screed and ruining your flooring. Chances are there might not be a damp proof membrane under the tiles as well. Finally, allow the latex to sit and dry for up to 24 hours. 5 mm must be completely compensated. USES Davco DW 1 may be used as a mortar additive for fixing. 2 litres of water with a slow speed drill. Ceramic tile is a building material made from clay that has been molded into tiles and. #1. For larger tiles made of either ceramic or porcelain it is important to get the most effective adhesive on the market. JC Flooring Professional Carpet Fitting Service. If you're laying Karndean over existing flooring, be sure it is properly prepared. of the adhesive, screed and waterproofing compounds onto the surface. co. LVTs like Karndean Amtico Moduleo etc yes. 2. Adding a little extra water to a thick mix can make it spread easier, might increase drying time slightly. Over the years one side has very slightly moved out of sync with the other and using a thicker bed would have lost any irregularities in the surface. 1. Latex screeds are self-leveling compounds usually consisting of a powder and liquid latex. Discussion in 'Builders' Talk' started by oogzy, Nov 3, 2005. Please help !!! I've had a 4mm-5mm latex screed laid using mapei renovation screed as I was advised this was the best option for a final floor finish as I was only left with about 7-8mm to work with as a microcement floor I had laid had gone wrong. 3. Walls: 4 mm in 2 m. 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. over almost all subfloors without priming, including ceramic tiles, bitumen and flooring grade plywood. Like 1. £46. The system specified will depend on the room size and type, if fixed units are present, if a new floor base is being laid or what the existing sub floor is made of and the final floor covering. oogzy Member. However 13 IS a Prime Number as it can only be. A self levelling compound is your answer, cost about £12-£18 pounds for 25kg bags, float over the surface using a flat trowel in an even motion much like spreading tile addy. Mix 1 part water to 1 part Prime & Bind. Work the chisel under the tiles, forcing them loose. Resilient floorcoverings can be installed after just 4 hours and ceramic tiles in as little as 3 hours. insulation board) Bitumen residue* * Best practice is to remove all bitumen. The example of bumps (OP's problem) of one quarter inch maximum, should prove no problem needing levelling (for flat/smooth). material system used as a base over which the ceramic tile is to be fixed. Applying the primer: To apply the primer, use can either use a paint brush or a paint sprayer. Spread adhesive onto the wall quadrant using the flat side of the trowel, covering only as much of the wall as you can comfortably work in 20 to 30 minutes. Textiles can be found in fuse boxes behind the actual fuse. installed after 4 hours and ceramic tiles can be applied after 3 hours. How to Install Sheet Vinyl Flooring Over Tile. For wet areas such as. Search the floor for any loose or damaged tiles. Pour the mixture. While putting a self-leveling compound on Bitumen floors is not recommended, a few other tricks can help, like applying PVA primer or using Ardex 2-part self-leveling compound that combines latex with the concrete. 1 Using a Tile Leveling System for uneven walls: 5. 3. Floating engineered wood is ok. You can achieve tilling over a slate can with an experienced tiller. I'm new to this and didn't select reply before. A. Vinyl Flooring Options. Coverage: Approx 6 m at 3 mm thickness. laminate is ok. 2. This prolonged drying also means that the job can be delayed for significantStep 1: Divide the floor into sections. Remove cork tiles and then screed over concrete and remaining quarry tile/ cork. 1 to set ceramic and stone tile, including large format tiles, over the KERDI membrane. When the old floor material is a still strong ceramic tile surface though, you can place the new covering over the tiles as long as you create a smooth surface beforehand. We have thought about having a. 6. The mortar has an open time (work-able time) of about 1 hour. Easy to use by mixing with water according to the manufacturer's instructions to get. Forget the PVA. Apply evenly one coat of primer (for mix ratio see step 2. almightymat. Arditex NA can be laid from a feather edge up to at least 12mm in a single application or up to 30mm incorporating Ardex Coarse Aggregate. The typical total for a classic screed is between £15 and £16 per metre squared. But applying self-leveling concrete over old vinyl tile is not a good choice. Not actually used it myself (yet) but looking to level my garage floor so done a little research. Also use for interior applications over exterior-grade plywood. Underneath the floor tiles was this black substance which I have since found out to. Applying a semi-dry cementitious type of screed. If another coat is needed, apply at right angles to the first coat. Can be used in bonded and unbonded applications. Post reply. Screeds are typically bonded onto most. If you are installing where existing floors have been removed, check that there are no traces of previous adhesive residue. Yes prime the latex then fix tiles using a flexible cement based adhesive . Self-adhesive vinyl tiles can be laid perfectly on the screed and liquid screed. Apply the Bonding Primer. Allow the tiles to dry. Tile panel movement joints should be created at maximum 3 meter centres in both directions, as well as around the perimeter of the floor. Roll the primer onto the tile, being careful not to press too hard on the roller. Maximum gap measured with a slip gauge. Alternatively, you can also grind down the uneven concrete flooring by using other tools or sandpaper. - Assuming the screed has completely gone off (say 2 to 3 weeks) and I lay the compound, how long after this can I tile. 24 Oct 2014. One tradesman discovered thermoplastic tiles underneath the carpet and recommended screeding before putting the underlay and LVT down. If you have the height you could tile over the top - its not ideal. 2×4 on edge; any areas where the gap between the slab and the 2×4 is wider than 1/8 in. Primers. Screed, float and level from 1/4" to 3" (6 mm to 7. rip some 18mm ply. All depends how big is your kitchen. ABSTRACT The use of polymer/latex type additives that improve the performance of thin-set adhesives and mortars has been in common and increasing use since the 1960's. Hmmmm Tiles should be installed using a latex modified adhesive system, i. However, the Quikrete High-Performance. Answered 17th Jan 2012. Category: How To Guides. Answered 14th Jan 2022 Like 0. A proper floor fitting will screed over tiles and lay karndean but I have no idea whether it would render underfloor heating useless. Hiya I have a small bathroom which I tiled with "bargain" tiles from B&Q. Making sure the floor is level is vital when laying vinyl tiles. Use these tools to calculate the approximate amount and estimated cost of products needed to complete your project. If the layer of screed is bad and the Tile is cut improperly, it will result in cracking in the long run. any good floor layer will be able to screed out a 5mm dip in your. Raspberry_Swirl Posts: 1,386 Forumite. AS 3958. The price is usually around $14-$28 SGD per square foot; Screeding cement is a simple process that can be done at home. Arditex NA can also be used to encapsulate under-tile heating cables/mats onto concrete/screed/tile backing boards, prior to fixing ceramic floor tiles. simple answer is no, this is mainly down to the adhesive failing underneath. Grind Down The Levels. Order Bostik Cementone Cempolay Universal Primer Clear 2. June 28, 2022. The products are mixed together, poured onto the floor and trowelled to a flat finish. UltraTech TILEFIXO is a polymer modified cement based high performance, high strength, high quality tile adhesive developed to fix tiles, Natural Stones over walls and floors. C. 5 mm must be completely compensated. Suitable for both internal and external, thin bed applications. Tile keeps getting bigger and bigger. g. Floating engineered wood is ok. SR2 5mm. However, I have a number of questions. ARDITEX NA can be used with confidence over almost all subfloors without priming including ceramic tiles, bitumen and flooring grade plywood. Step 4: Mix Mortar. FAQ. Ceramic tile / stone adhesive - floor and wall thin set mortar DESCRIPTION Davco 168 is a cement-based, thin or medium bed ad-hesive, suitable for fixing ceramic tiles onto walls and floors, dry or wet interior or exterior areas. If you have a 300mm of depth, you might want to put in 225mm of insulation. 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. JC Flooring Professional Carpet Fitting Service. Resilient floorcoverings can be installed after just 4 hours and ceramic tiles in as little as 3 hours. Use long strokes and hold the trowel at a consistent angle. camo Member I'm a bathroom fitter & have a small. If the plyboard has been pulled down in some area because of the screws when securing it a levelling compound might. Applying a semi-dry cementitious type of screed. Tile Backer Boards. You need to adurapid crack, then primer and latex then. The. SR1 3mm. So it is best not to use self-leveling concrete or compound over existing vinyl tile. Color: Gray. Packaging: 25kg bags. thank you very much for the clarification. As it might sound, a bonded screed is applied directly to the. 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. The remaining screed appears to be between 10mm and 20mm in depth. Uplift existing tiles and latex screed subfloor, like another fitter said use Arditex NA that way there is no need to prime. If the plyboard has been pulled down in some area because of the screws when securing it a levelling compound might. BUY NOW: US$33. Self levelling compound will put a lay of 2mm ish if spread on 2sq Mt. Under ‘wet’ consistency toppings/overlays; 4. Applying Screed. An acrylic primer should also be applied to the surface that will ensure your tile adhesive will efficiently bond to the screed. There are three main types of screed – bonded, unbonded and floating. 0222 / mm thick: 6 mm thick glazed tile + adhesive: 0. Reply to Kitchen Floor tiling on Latex Self Levelling Compound in the.