The asphalt content lends mastic its black color. #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. It can be applied over virtually any substrate such as old adhesive residues and ceramics. 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 -. Ceramic, Terrazzo and Quarry Tiles. 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. Answer: This will depend on the type of tiles you are going over. Floor Tile Gray Thinset Tile Mortar (50-lb) Model # 1011236. Floating Floors. The floor is then completely sanded and vacuumed. When laying vinyl, ceramic tiles, carpet and other floor coverings. Essentially you use the tip of your shovel to knead the mixture. co. Remove and Smooth. simple answer is no, this is mainly down to the adhesive failing underneath. Table 4. Screeding over ceramic tiles. Good-Wood-Floors . 3. Installation of Heated Screeds and Substrates for. Laying carpet tiles over. Systems,. 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. 8. As long as your floor is level (as in 'water level' as opposed to 'flat/smooth) then any minor bumps or pockets are trivial, and will be taken up by the level of adhesive. Replace the grout in the lines using a grout float to push the grout into place. Products for Ceramics and Stone Materials. Step 5. SikaCeram® StarGrout Epoxy based grout for joints from 1 to 15 mm width. Existing Vinyl Tiles * Steel/Metal Surfaces. 5%. 1. 3m x 4. 1 Tiling over existing tiles. Mortar screeds: Tiles can be installed on as soon as they are ready to bear weight as opposed to the usual 28 days of curing. Self-Levelling Floor Screeds Compound. Step 6 – Double Check Measurements. Mix a small batch of thick screed and in-fill where the tiles are missing. 5 mm must be completely compensated. 966 289 0. It’s walkable in only 3 hours, receives ceramic, or stone tiles from 4 hours, and resilient floorcoverings from just 48 hours. the concrete or sand/cement screed should be confirmed dry by. • For use with porcelain tile and over a wide range of floor surfaces when mixed with Polymer Additive (#13956) instead of water. 1-2007 – Ceramic Tiles; Part 1: Guide to the Installation of Ceramic Tiles 2. 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. 9. 2%, and it is white asbestos which is the least dangerous type. Waterproofing applications are important in housings, commercial and industrial buildings to protect against water intrusion in bathrooms, kitchens, balconies, swimming pools, basements, etc. If a dipping grade adhesive is not wanted, then the trowel applied Styccobond B95 adhesive can be used instead. What's the best latex / screed to cover ceramic tiles Andy O'Hara Peter Newman Flooring Www. The short answer is yes, you can screed over ceramic tiles. they will 99% of the time be a very poor strength compound. With an average labour cost of £11 per square metre, we arrive at a screed floor cost of £26. 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. Where it differs from other smoothing products is that there is a latex additive. Economical: Suitable for tiling on fresh screed. 6. Review the jobsite conditions and find out what needs to be fixed. Using the diagram below, we would dry-lay tiles 1,7,8 etc and space the row out so that tiles 12 and 39 were roughly the same size. . I would lay a latex screed over the lounge and hallway after replacing or filling (with sand/cement) any loose tiles. Northampton •. Key features are: Longer working time compared to cement slurry. Advantages. However, there are a few factors to consider before embarking on this type of project. I gather you are planning on putting down a floating wood floor i. Hi Fred. 3 from AS3958. Once the tiles are rumoved there will still be bitumen on the sub floor. 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. VAT. I did end up hacking up the tiles, the self-levelling compound came up too! My builder refused to take any responsibility. 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. latex floor screed is a cement-based smoothing compound. Ready to tile now, use good quality tile adhesive and grout, powdered (bagged) materials are best. Apply the Bonding Primer. Any difference in levels at the doorway can be. Ive also had 70 m2 latex crack over vinyl tiles. You need to adurapid crack, then primer and latex then. 12. Reply to Kitchen Floor tiling on Latex Self Levelling Compound in the. Best Self-Leveling Concrete for a Concrete Floor—Quikrete High-Performance Cement FastSet Self-Leveling Floor Resurfacer for Ceramic Tiles. ”Information Paper from IHS BRE Press provides practical guidance for architects and specifiers. What's the best latex / screed to cover ceramic tiles. then use, f. 5 Step 5: Comb Gently: 6. Use a paint roller. 211 POWDER is a factory prepared blend of carefully selected raw materials, Portland cement and graded aggregates. Be careful of latex compounds that say they can go over ceramics with no primer. Under ‘wet’ consistency toppings/overlays; 4. In addition to vinyl flooring, there are other options if you want to install the flooring directly over ceramic tile. e. I asked a contractor who happened to be in my company and he say the same thing too. Thank you for your advice. For larger tiles made of either ceramic or porcelain it is important to get the most effective adhesive on the market. 2,011 764 113. nThis floor screed is a versatile smoothing compound for levelling uneven floors before laying decorative floor coverings. 2. Ordering and Purchasing. then a liquid membrane goes over this called ardex dpm 1c. 4 Screed. g. Renovation property: £60 to £85 per square metre. Calculator. Finally, allow the latex to sit and dry for up to 24 hours. Tiling floorboards with wood effect tiles offers a variety of benefits over natural wood, including being more durable, and easier to maintain and keep clean. Thicknesses of 1/4 inch to 3/8 inch are typical (6 to 10. com. must be filled. Last edited: Sep 2, 2010. 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. bournemouth Super Moderator. Measure each side of the tile under test at positions 5 mmfromthe comers. Gypsum based screeds: According to the applicable standards, the residual moisture of gypsum based screeds should not exceed 0. AS 3958. they will 99% of the time be a very poor strength compound. Reply to londonchap81. Below the tape there will be no paint, so your ceramic tiles will now have a perfect border. Step 4. If the plyboard has been pulled down in some area because of the screws when securing it a levelling compound might. SikaCeram® Sealing Membrane W Flexible sealing and decoupling membrane used for waterproofing walls and floors under tiles in wet rooms. There is no additional water, just pour the bottle of latex in. If you have the height you could tile over the top - its not ideal. Unit Size Available: 20kg Powder 4. Chances are there might not be a damp proof membrane under the tiles as well. The function of a primer is to prepare the surface and increase the bond. of the adhesive, screed and waterproofing compounds onto the surface. 1 Add a decoupling mat to the substrate. 06% (0. Whilst it is still poured at a shallower depth than traditional sand and cement screed, the minimum 35mm pour is. 1 Sand-cement screeds should generally incorporate a latex additive (such as Planicrete) and should be installed as per the guidelines in Appendix A of AS 3958. 3. whats the Best latex for screeding over ceramic tiles? ardex na have also used green bag and mapei latex plan make sure you prime first. Flooring. 1. Color: Gray. Heating mats, loose. not a water based mix. Cement screed flooring Singapore: pros and cons. Once broken up into sections you can more easily ensure your floor will be evenly screeded. (19 mm) Thickness) Typical Mix Ratio: 5. The tiles will also stick to ceramic tiles if they are untextured. Mapei prim grip is the grey primer. 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. Cost effective – up to 50m² coverage per 11kg bag. Mastic is a general term for a type of glue-like adhesive. A chipboard floor will move when walked upon. Jul 30, 2012 #1. Maximum gap measured with a slip gauge. A self-leveling compound is. high performance thin-bed adhesive for installing a wide range of tiles and stone including low absorption ceramic tile, porcelain tile, natural and manufactured stone using thin-set. Place the mixed product onto the area to be ‘screeded’ and screed to the desired thickness and plane using an appropriate straight-edge. I have an early 1970s bungalow with concrete floor. It is foot trafficable within three hours, and can be tiled after approximately four hours. 8 Repair Concrete Floor Before Tiling, some helpful tips. insulation board) Bitumen residue* * Best practice is to remove all bitumen. Product calculators. Use reputable flexible adhesive for tiling on screeds and concrete and as per the manufacturers specifications, DO NOT USE PVA but a latex based primer if the concrete surface is. 6. 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. Measure the gap between the floor and the raised end to check how far out the floor is. Screed is commonly set underneath timber, carpet, resin coating, natural stone, tile and vinyl flooring. 8: Terrazo paving: 0. Also use for interior applications over exterior-grade plywood. #1. (with added latex powder), requiring only the addition of water. Installation of Ceramic Tile . Coverages provided are for estimating purposes only. Ensure the floor is fully dry - the residual moisture level should be less than 0. Floor levelling compound is also known as self-levelling compound. Latex screeds are self-leveling compounds usually consisting of a powder and liquid latex. Application examples:The topic ‘Asbestos floor tiles’ is closed to new replies. (screed and renders). When bonding directly to the substrate with a bonding agent or a primer the minimum is 1-2mm (feather edge) with smoothing compound. Rich. Its on your back if you risk 30 quid of screed over a few hundred of tiles!Firstly, paint the quarry tiles with a liquid damp proof course, let it dry. I would recommend screeding it because it would encapsulate the tiles but also give you a perfect surface for whatever flooring you decide on in the future. With the application of DITRA matting, tile coverings. The mixed adhesive shall be applied over the protection screed to a thickness of 3mm up to 1 sqm at a time. Resilient floorcoverings can be installed after just 4 hours and ceramic tiles in as little as 3 hours. 5 Ltr. Bonded. Discussion in 'Builders' Talk' started by oogzy, Nov 3, 2005. T & G Floorboards. 3. Underneath the floor tiles was this black substance which I have since found out to. You can latex over ceramic tiles no problem as long as you use the correct primer. Tiles with ribbed or keyed back profiles should also be back-buttered to ensure complete coverage. footprints and trowel marks. Porous unglazed clay or stone tiles, on the other hand, require no additional preparation. The matt sits on top of insulation boards (10mm), which in turn sits on top of a concrete floor). 2-2012 – Waterproofing membranes for external above-ground use – Part 2: Design and installation B. ARDITEX NA can be applied on all common subfloors such as concreteStep 4: Mix Mortar. . 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. masonry chisel and a 2-lb. Screwfix customers rate this product 4. we don't need a specialist. DIYDave. Prime and smoothing compound then any LvT. My kitchen floor is part bare concrete and part quarry tile with cork tiles stuck on top. Leave to go off slightly then sprinkle some water over and smooth over with the trowel. For decades. Mix 1 part water to 1 part Prime & Bind. 2. Www. Alternatively, you can use a flat shovel or a floor scraper. 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. According to British Standards, any deviations should not exceed 3mm when measured under a 2m straight edge. 4 hours and ceramic tiles after 3 hours ¥ Suitable for use over old adhesive residues including bitumen ¥ Moisture tolerant - can be used below a DPM ¥ Excellent flow and self-levelling properties ¥ Excellent adhesion properties without priming most substrates ¥ Ideal for use above underfloor heating systems ¥ Ideal for timber substrates In order to check the level of your floor, use a long spirit level (2m is ideal). Lee Allen New Member. To be confident you’re starting with a flat, smooth surface, you should render the walls and screed the base. Hi, You can lay the carpet directly over the bitumen. 7 Step 7: Leave for 24 Hours: 6. Volume. Definitions The following definitions are used in this document. Tiling onto green screeds or concrete. Q. The tiles will have to be screeded over before the LVT can be laid. wowfudge · 03/08/2017 14:00. Step 5 – Measure & Draw a Diagram. Yes prime the latex then fix tiles using a flexible cement based adhesive . III. There are three main types of screed – bonded, unbonded and floating. Uplift existing tiles and latex screed subfloor, like another fitter said use Arditex NA that way there is no need to prime subfloor first, Saving you drying time and of course money. 2 states: Where a tile bed or screed is used, the waterproof membrane shall be installed above or below the tile bed or screed. You can paint over any blemishes or missed spots that the painter's tape covered up, but be sure to let them dry. Total Time: 2 wks, 1 day - 2 wks, 2 days. you might just have a low spot along the old wall where the concrete meets the wooden floor. If you are applying paint in a high-traffic area or an area with a lot of moisture, a protective coating is also recommended. In this concrete floor video, industry expert Bob Harris shows the steps for installing a new concrete floor over an existing tile floor. With the existing tiles removed you're removing the risk of the screed failing. Supplies. Answered 24th Dec 2021. When laying vinyl, ceramic tiles, carpet and other floor coverings. Tile adhesive is a specialized material designed for bonding tiles to surfaces. 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. bournemouth Super Moderator. Glazed or textured tile surfaces should first be sanded back to ensure a good bond with the concrete, wide grout joints should be sealed to avoid obvious outlines and sinking, and several coats of primer should be used to prepare the site. Screw the sheets to the subfloor, using rust-resistant screws and spacing them 6 inches apart. Andy O'Hara. If the tiles are in good condition, with no cracks or chips, then screeding over them should be possible. The subsequent application of the tile adhesive is made easier and more cost effective by removing the need to pack out dips and uneven areas with excess product. Floating engineered wood is ok. Only if you dont like HDB tiles and want to use your own tiles then no need for screeding. Flowable liquid floor screed suitable for applying up to a depth of 5-50mm onto: Floors with underfloor heating or under tile warming; Cement; Concrete slabs; Pre-cast elements; Wooden flooring; Existing ceramic tiles; Existing rigid plastic tiles; Floating floors (e. Post reply. Color: Gray. 16 Aug 2013. 246: 10 mm thick porcelain floor tiles + adhesive: 0. Over the backs of ceramic tile, stone or brick before placing concrete or mortar during fabrication of ‘negative’ cast panels. Country Availability. However, with unsatisfactory fixing practices or in certain climatic conditions, moisture expansion in excess of 0. it is not recommended that you but self-leveling screeds over vinyl tiles, can cause yourself a bigger head-ace in the long run, and i know it can be a night-mare of a job but always better to take tiles up and start from scratch. Wet underfloor heating installation cost. Latex screed. Use the flat slide of the trowel to spread the mortar over an area about 3 feet square. Over time, an increase in stress build-up will make the tiles more likely to pop. For the installation of most types of ceramic tiles in interior and sheltered exterior locations. 8 Feb 2010. SR2 5mm. Skill Level: Intermediate. Screeds to adhesive fixed rigid tile applied floorings: BS5385 Part3. However, I have a number of questions. Over ceramic tile:It’s recommended to use a primer when tiling on a wooden floor, to ensure the best possible surface for the adhesive to bond with. 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. Making sure the floor is level is vital when laying vinyl tiles. BAL make their own, as does EVERBUILD and Cementone. I would assume that. 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. Apply a coat of surface liquid DPM to the tiles like Ardex DPM 1c or stopgap F77 then prime and screed. Hi Fred. SR2 5mmMAPEI. 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). Over plastic, semi-dry consistency traditional mortar beds (min 20mm thick) before beating in pavers and ceramic or stone tile in cold climate conditions. The next part of the process entails purchasing your vinyl flooring and adhesive product. 5:25 AM. If u dont use the right primer the floor screed will blow under nieth eney flooring. A “floating” screed is an unbonded screed applied over a layer of thermal insulating material, such as expanded polystyrene or polyurethane panels (Fig. 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). 24 Oct 2014. I was charged £2,600 and although I knew this was expensive I put. Related Documents: LATICRETE Drawing ES-W244(E), ES-W244(I) LATICRETE Drawing ES-F144 Ceramic Tile and Stone Over Cementitious Backer Units TDS126 Cement Backer Units Over Lightweight Steel. Where it differs from other smoothing products is that there is a latex additive. If the layer of screed is bad and the Tile is cut improperly, it will result in cracking in the long run. There are two types of screeds - Bonded and Unbonded. Step 2 – Sand Dried Mortar. A) ARDITEX NA ® can be used with confidence over almost all subfloors without priming including ceramic tiles, bitumen and flooring grade plywood. These BS 8204-7 compliant, quick-laying screeds are less labour intensive and. Tiles should be installed using a latex modified adhesive system, i. Hence they need to screed, because dont have ppl who put 30mm of cement before laying tiles. Moisture testing to confirm the dryness of the screed before tiling commenced. 3. Start at a broken tile or between tiles where the grout has loosened. For a full flooring renovation, hacking is required to remove the existing tiles. Laying ceramic tiles by Semi-Dry Mix Method. Ceramic tiles can be laid over virtually any level, firm, rigid surface that is clean, dry and structurally able to support the weight of the tiles; e. The best solution would be to pull the tiles up. co. rip some 18mm ply. steve have you checked the level of all of the concrete floor. Dump or scoop the mortar onto the surface. Important: Nothing should cover isolation joints or fill expansion joints except caulk. can i latex screed over the whole lot without removing the cork tiles which are very well adhered to the quarry tiles? or 2. If you're laying Karndean over existing flooring, be sure it is properly prepared. £10 - £12. 2 / 17. . Wait a few minutes. Pour as much Easy Mix Traditional Floor Screed into your mixing bucket as you feel you can comfortably mix in one go. However, a few superficial cracks developed across the screed surface. 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. These unique properties ensure that Arditex NA can be used with confidence over almost all sub-floors and without priming, including ceramic tiles. Priming becomes even more of a necessity once you consider the amount of dirt, plaster, adhesive, and various. idiots guide to laying latex self levelling screed Discussion in ' Builders' Talk ' started by camo, Mar 16, 2007 . All waxes or sealers must be removed, and patching/leveling or embossing must be brought to a flatness of 3/16” in 10’. but you should always prime the subfloor first, I believe you need to give the bitumen a slurry coat first. Self-adhesive vinyl tiles can be laid perfectly on the screed and liquid screed. BS EN 12004 C2F Adhesive. Strike the face of stubborn tiles to break them up for easier removal. 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. Cheers vman, Mar 3, 2012 #1. For ceramic tiles up to 30cm x 30cm or porcelain tiles up to 10cm x 10cm you’ll only need a low grip adhesive. Work the chisel under the tiles, forcing them loose. 08 inc. PT Flooring Specialists. Work the chisel between the tiles and the concrete, hammering them up with a 2-lb. 85kg Latex Coverage: 5m2 at approximately 3mm thick. This product is also suitable for application over existing concrete and screeding, brick, stone, unglazed ceramic tiles, plastic sheet DPC, and epoxy membranes. Hi Charlotte, I wouldn't screed over them as the adhesive used under the Marley tiles will be a very week bond and over time walking on the floor they can come loose which will then crack the screed and then the Karndean will be up. For Indoor Use. Both are correct, and have their various uses. Builders often refer to latex screed as a ‘levelling screed’ for this reason. Latex Floor Screed Thickness. Step 6. Screed: 20 mm over 3 m . 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. It shall consist of 1 part of cement to 4 parts of sand by volume to form the sand cement mortar, mixed semi-dry in a mechanical mixer with only sufficient water added to give a crumbly consistency that retains its shape when squeezed in the hand. Remove the painter’s tape to reveal a straight even edge. 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. #2. Like 1. Professionals often prefer using the 2-part compound since it provides faster results and has a shorter. 5m and need to be about 65mm thick. 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. Cover the floor in plastic sheeting. When painting a tile floor, the following three types of paint work best:. 5). Bonded Screed Minimum Depth. 2. #3. quarry, ceramic and most natural stone tiles* over interior or exterior concrete and masonry floor and wall surfaces. Applying a semi-dry cementitious type of screed. Non-structural floor screeds shall be adequate for the location and intended use, and provide a suitable background for floor finishes. Those based in rural areas may pay more for floor screening costs due to the labour travel costs. The first thing to consider is the condition of your ceramic tiles. Apply a screed on the concrete.