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Sounds like dpm (damp proof membrane) if it’s solid hard like glass and brittle check if your floor has been damp proofed if was under vinyl tiles not bitumen about 20 years ago the adhesive use. e. 13 Aug 2020. Muram flooring, also known as namely murram or moorum flooring. We're ready to help with your questions and requests. How cut 4" wide, 2" deep hole in concrete floor. Heidelberg Materials offer Asphalt deliveries 24 hours, 7 days a week up to a distance of 50 miles from each strategically located asphalt plant. Always check that the profile that is produced by the flail/picks selected are suitable for the material to be applied, the type and thickness of surface to be removed and the finished profile produced. Floor Screeding, traditional sand & cement, flowing screed, fast drying screed, membranes,. We have removed the wooden batons ,but we want to put down a new wooden floor. It is useful to remember that the larger the area the lower the price per square metre. This means that, when the floor screed is mixed with water, it has a much smoother appearance than liquid concrete. Can be used on concrete, screeds and stone floors. For example, when laying 35mm thick flags, the screed level will be established at 27-30mm below finished paving level, leaving the paving 5-8mm high which is then tapped down to the correct level. Screed (material) pumping truck. Pouring hot bitumen is. If the floor slab or screed is less than 5mm out of level you can use a self-levelling flooring compound, or self levelling screed. Our calculator supports three mix ratios: 1:3, 1:4, and 1:5. A few floors were finished with wooden blocks laid in bitumen. 5. The floor screed provided a smooth finish suitable for carpets or tiling. Watco asphalt crack filler is a polymer modified, flexible crack filler for asphalt and tarmac surfaces. 5 ratio of cement to sharp sand. Packaging: 25kg bags. At CONEXPO 2023, VÖGELE will be presenting a cross-section of its products, from the small paver, the SUPER 700i, the SUPER 1300-3i compact paver and the SUPER 1703-3i 8 ft paver through to the. 0800 242 5589 - info@speed-screed. This has left a black bitumenous residue on the concrete screed and I'm concerned about tiling onto it. The cost of a traditional screed is between £11 and £14 per square meter, based on a thickness of 75mm and a daily coverage of 125 square meters. Fixit Super Latex Pagel ZL10 Pagel U40 Dr. Electric Concrete Saw 14". Wayners, Jan 8, 2021. sales@ardexaustralia. 1. Subfloor Preparation & Levelling. 2 July 2013 at 8:01AM. In our trade, it's most commonly used in its form as a thickish, gloopy white liquid, which echoes its roots as a. For levelling or smoothing differences in thickness of 1-10 mm to receive all types of floor coverings. Mechanically remove the bitumen, (there can be trace amounts only) prime the surface with an epoxy DPM, or 2 coats of epoxy if it is replacing the DPM. Mastic asphalt for Flooring Product Range; Mastic Asphalt Screed; By Application. Screeds should be laid to the specified. Liquid Screeding. Apply standard water-based (concrete application) slc to all of floor. September 08, 2023. Bitumen is a black, tacky and hardwearing. Our screed plates have proven themselves to last at least four times longer than the OEM screeds. Thanks to its waterproofing qualities, it is widely used in construction. If you’re a contractor and would like to become an approved installer of our systems please contact us on 0113 245 5450. 00 (Ex VAT) New lower price. 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. Bituminous Coating Waterproofing. Latexplan No Ammonia is suitable for levelling differences in thickness between 3mm to 10mm on new and existing substrates. It is also regularly installed in place of traditional screed for including: Tile and stone. 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. SBR is more formally known as Styrene Butadiene Rubber. ARDEX R 70 P. 22 Aug 2010. However, it makes a difference whether you apply the screed directly to the bitumen membrane or whether other layers follow in between. Quick drying (24 hours for light traffic) Excellent resistance to UV and weathering. You can screed/self levelling compound over bitumen no problem- just 2 coats of SBR dIluted 1-4 with water over bitumen, allow to dry, pour SL. 5:25 AM. If you are looking for expert flow screeding contractors then go no further than Flow Screeding Services! We look forward to receiving your flow screed or floor screed enquiry. The heavier screed you have, the more stability. Mixed screed accepts light foot. sloping concrete screed (utilizing 12 - 20 mm baby chips) admixed with ZUPA Santulan Integral Waterproofing Compound @ 100 ml / bag of cement, ZUPAF. Note: ARDEX A38 / A48 Rapid Set Screed does not require additionalAsphalt Plant Locations & Delivery. Fixit PU Plain Injection Dr. Home. Flowable liquid floor screed suitable for applying up to a depth of. Bonded or Un-bonded. Ideal for cutting concrete, asphalt, and metal in indoor or enclosed environments. Get a contractor in to do it correctly for you. Asphalt floor screed is also known as mastic asphalt has a multitude of applications. If it's going to be level and 2"-3" thick i don't see the need for SLC. Flooring Components – Top coat; Flooring Components – Wear Course; Floor Components – Base Coat;. However, it was common practice to apply a layer of bitumen on top of the floor slab to stick down woodblock flooring or thermoplastic floor tiles, which acted as a basic DPM. It was commonly used to glue floor tiles in place and can be found in many buildings constructed before 2000. There are many proprietary screeds on the market and information about these can be obtained from the manufacturer. Bitumen, polymer, silicate (mineral) were studied in terms of their cohesion with the substrate and their sealing ability, used in combination with different building materials—ceramics, concrete, lime-sand bricks and marl stone, the. The screed acts as an insulation between the tile adhesive and tacky bitumen. As it might sound, a bonded screed is applied directly to the. Due to the different particle matrix in a granolithic. If the floor is dry and free from dust etc then Ardex NA or similar is the perfect solution, though it can be relatively expensive. 85kg Latex Coverage: 5m2 at approximately 3mm thick. 3. As it's technically tarmac i wouldn't see the need to. 5 mm) (No. It can be used over most existing adhesive residues, including bitumen. Labour costs. Tanking garages and sheds. Self-levelling smoothing compound, designed for smoothing and levelling internal floors. It can be used over most existing adhesive residues, including bitumen. for use on asphalt pavers allatt champion (also see vogele) verify part numbers prior to ordering. However, I contacted a specialist anyway, and we are looking at £400 + VAT to remove the tiles. ScreedMax Grano is often used for external screeding projects under paving, around pools and areas of high traffic. If the surface is in screed, the bituminous membrane is the ideal solution. Marley Tile Removal . Introduction: A screeded bed is typically established approximately 5 to 10mm high, and the pavings then compacted down to the required level. Whilst still being fast enough to receive tiles from 24 hours, and resilient flooring from only 7 days. Prime CE. Floor finishes should be applied with the correct adhesives, for example: bitumen rubber emulsion (in accordance with BS 8201) proprietary adhesives (assessed in accordance with Technical Requirement R3) in accordance with manufacturers' instructions. Using a kango would also get you below the bitumen and are less likely to release fibres. Lightweight, less noisy and simpler alternative to gas powered cut-off machines. I believe as long as it's floor grade asphalt/bitumen you can tile straight to it. I believe as long as it's floor grade asphalt/bitumen you can tile straight to it. The floor in the living room is a bitumen floor, and it was in a very sorry state. SOPREMA’s bitumen roofing systems are BBA certified, impact and tear-resistant, and they are guaranteed to provide. 5sqm has blown. concrete floor self leveling. Prime the concrete part of the floor. Asphalt Tarmac offers the widest range of asphalt and high-performance road surface solutions in the UK. . The remelting shall be done at the site in a mechanical mixer; the mastic temperature shall not exceed 200 degrees C during remelting. ph@bostik. Standard or Ultimate Tarmac asphalts. Mastic asphalt screed is also called AS and, contrary to the above example, has nothing to do with water. Screeds or concrete surfaces to receive wood finishes:Bitumen, or asphalt, is a type of substance commonly used as a protective coating for floors. Due to the different particle matrix in a granolithic. Asphalt floor screed is made by combining specific bitumens and aggregates with limestone filler. The floor is a concrete sub base with a 20-25mm bitumen screed on top of that. Concrete has a much coarser mixture than screed, consisting of larger, hard-core aggregates, which are the key element that gives it its durability and makes it strong and long lasting. I bought some real wood (oak) to lay over the ground floor of my ex-Council house which was built in the 50's. 2 Multiple Layer Two or more layers of bitumen felt laid with over- lapping joints and bonded together with bitumen. The floor must be thoroughly swept to remove all traces of dust and loose particles, taking. Furthermore, a number of special polyurethane products can be installed as insulation under poured-asphalt floor screed and withstand temperatures of +200°C without additional heat protection, or. The floor is not very level so I was hoping to use some self level on top of it so I can lay a wood floor. This bitumen-friendly self-leveling compound is relatively easy to use and can be applied to many different types of flooring, including… Concrete, and Floor Screed; Ceramic, Porcelain, and Quarry Tiles; Plywood, Terrazzo, Old Adhesives & More; This economical product sets in as little as 4 hours, and you can apply the floor covering quickly. Rapid setting and quick-drying properties ensure the floor can be walked on in as little as 30 minutes, ensuring overnight and even same-day turnarounds. (5m² per 5 litre container) Colour: Blue when wet, Black when dry. Repeat steps 2 and 3 till floor is built to recommended level. The screed on this paver spreads and smooths the asphalt. The flooring screed is delivered ready-to-use so you are always sure that it is mixed correctly. The aim of the research was focused on the functionality of three types of waterproofing screeds from the perspective of their use in building structures. The council workman laid a latex based screed over the floor. However, it was common practice to apply a layer of bitumen on top of the floor slab to stick down woodblock flooring or thermoplastic floor tiles, which acted as a basic DPM. Select the screed mix ratio (cement: sand) from the dropdown menu. Bonded. In most rooms, the tiles are still in place, in varying conditions. As a result, areas of up to 1,000m2. It is also regularly installed in place of traditional screed for including: Tile and stone. MMA flooring has a unique chemical structure that allows for newly laid resin flooring systems to be fully serviceable. Cleaning up Concrete floor covered in Bitumen – Tile. 5 ratio of cement to sharp sand. This high-performance screed is fully British Standards-compliant and CE marked. The weep screed shall. Bitumen can be problematic for tiling over and cause unnecessary damage and stress – the last things you want to endure during a renovation project. Prime and smoothing compound then any LvT. Having read the sticky threads regarding liquid DPM and self leveling for concrete, I have an understanding of what is. How long to let a concrete walkway cure. 3. Country. Bonded or Un-bonded. The screeding/latex has laminated (like puff pastry) and is breaking up. Whilst still being fast enough to receive tiles from 24 hours, and resilient flooring from only 7 days. Screeds above underfloor heating should not exceed 40m 2 with a maximum length of 8m. Will be difficult to use bitumen paint specially under the plaster, I think your best bet is to use hot bitumen pour which will fill in all the nooks and crannies. Ortigas Jr. . Caterpillar offers a broad range of asphalt paving machines from wheel and track asphalt pavers to tamper bar and vibratory screeds. Or + - 2mm over 3 meters. Bituminous membranes are perfect for waterproofing roofs, basements, below-ground structures, bridges and other structures. Our solutions include waterproof membranes, waterstops, joint sealants and protective coatings. 7. (14) For steps, ramps and floors, in wet or oily areas. The addition of other polymers means that it can be flexible and resistant to crack formation. Ball and Co. They’ve been laid on bitumen. After extensive data collecting, we’ve found that the savings over the life of a chromium carbide screed is between $12,000 and $13,000, depending on the make of screed. Cannot be ingested by animals. #1. 6 Tiling over bitumen adhesive, some helpful tips: 7 Tiling over old adhesive, is this possible,. . There’s a bitumen layer on the screed which was used as tile adhesive (tiles no longer present), I’ve had this tested by a surveyor, this contains Chrysotile (white asbestos), which I read can be removed by non licensed contractors (but still have to operate under 2012 control of asbestos regulations). Floor and Roof Screeds Vermiculite concrete screeds are light, insulating and intrinsically fire resistant. bitumen floor floor tiling residue screed tile tiling; Discuss bitumen residue on floor screed in the Floor Tiles area at TilersForums. Sika's Industrial Flooring Solutions Can Benefit Your Project. We have a specialist asphalt flooring team who can help you with all aspects of asphalt flooring. Tool base adjusts allowing up to 5" cutting depth; best for cutting split face block when building retaining walls. Theses products can be applied as an asphalt Resurfacer or screeding the surface. weberfloor flex is a self-smoothing floor levelling compound — often incorrectly referred to as a self levelling screed or self levelling floor compound — which can be tiled onto and is an easy screed for applying onto floor substrates subject to some movement, such as wood or underfloor heating. The inset timber battens are ther to provide a fix for the floor boards (your floor pre-dates modern glued floating floors). The SE47 FM and SE60 FM Cat screeds have front-mounted extenders for wider width paving for paving ranges of 8 to 20 feet 6 inches, and 10 to 25 feet 6 inches,. 44 - 4. 4m 2 at a depth of 5 mm. It can be installed to create drainage falls, level out uneven substrates, and provide a stable base for the specified roof /deck waterproofing system. Providing surface and sub-surface drainage by implementing falls, to an outfall, is an integral part of waterproofing design. This causes a shadowing effect to the Newley installed smoothing compound /screed. Hi Pete, I have the answer. Screwfix Select. Screwfix Select. . link with wall DPCs to form an impervious barrier to prevent moisture reaching the interior of the dwelling. #1. Medium Duty. It should be laid in bays not exceeding 9m2 in area, to reduce the incidence of cracking due to drying. Idelly you need a additive called sbr. Polyurethane Primer. Typical applications are the protection of concrete floors and screeds against wear from traffic abrasion, as well as a. Customer Service Email: phil-customer. Created by VideoShow:cold, single layer and inverted roof bituminous waterproofing systems are available from SOPREMA as well. It may be applied onto either a solid in-situ concrete ground floor slab or onto a precast concrete floor unit. Mastic Asphalt Screed should be laid directly to the primed concrete/ sand & cement screed wherever possible. com. In the concrete floor was some wooden batons . 3. By. Accepts subsequent floor coverings in 4 hours. 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. #2. Request ARDEX Warranty. 2. Labour. If u dont use the right primer the floor screed will blow under nieth eney flooring. ARDITEX NA can be used with confidence over almost all subfloors without priming including ceramic tiles, bitumen and flooring grade plywood. The cost of a traditional screed is between £11 and £14 per square meter, based on a thickness of 75mm and a daily coverage of 125 square meters. Option 1: Chemical Removal. To do the job properly, the screed needs to place mix at the right thickness, on the right slope, and with the right surface texture. Asphalt paving repair contractors - Floor screeds even on a concrete slab are laid each time a developer has finished the slab concrete. Fixit Novolac TC Dr. As for wether or not it needs to be primed, i'm not sure to be totally honest. It provides a good, smooth, hard-wearing floor surface, making it popular in construction. Vogele When paving, the last point of contact between the paver and the final product is the screed. Thermal conductivity (W/mK) Acoustic plasterboard. The addition of other polymers means that it can be flexible and resistant to crack formation. Nevertheless this. Save 49%. Ambient Air Temperature. The only problem being sbr additive is expensive . Screeds The surface of the screed should be finished according to theWatco Sand Additive 5KG. Lee Toop. Typical applications are the protection of concrete floors and screeds against wear from traffic abrasion, as well as a. 1 Weep screeds. For problem floors, especially on refurbishment. Mastic asphalt screeds offer a variety of benefits that make them a preferred alternative to traditional concrete screeds. com - Is asphalt floor screed a blast from the past? I’m Andy Parkin, Managing Director of the Multi-Award… Asphalt Floor Screed on Vimeo1. 2. ARDEX R 70 P. Shop our full repair range for cracks online at watco. Proofex Engage, the original mechanically bonded, pre-applied, below-ground. Option 1: Chemical Removal. If the floor is just soil underneath the screed then take the level down enough to allow for. Floor, pavement, joint repair mortars. Apart from breaking into the existing hall floor, is there any way of finding out if the surface is just screed rather than concrete (I appreciate the difference between the two in terms of content, but not appearance). With us you will learn everything about. Remove parquet and some bitumen, seal the floor and remaining bitumen, then use a self levelling compound to level the floor. It is essential when a floor that is next to the ground is constructed, that a proper damp proof membrane is placed to prevent these issues. 1 Option 1: Use a floor grinder to remove old adhesive: 1. Is there a primer I can use and which would be the best self levelling compound to use. Asphalt is only suitable as a driveway base if it is at least between 2” and 4” thick for residences. I intend to use a fast-drying screed mortar, and a friend who project manages largish construction work has advised that I include chicken wire mesh to provide support for what will be about. Manchester • Member since 5 Jun 2015 • 64 jobs, 95% positive feedback. 30. There may be a minimum call out charge so you should check by speaking to a member of the team. 2 Option 2:. Like a lot of houses of that age, the ground floor is bitumen/asphalt over a. A screed floor is a type of construction flooring that has an even thickness and surface. Also available are crack and hole repair products, line marking paints and symbols, and garage floor paints. Patch repair mortars. They are simply made by mixing exfoliated vermiculite aggregate with Portland cement and water. Asbestos in Bitumen. Specialist blast, ballistic blocks and fast beam and block materials. It provides a good, smooth, hard-wearing floor surface, making it popular in construction. Unit weight or density is used to quantify the weight per unit volume of an object. 33312. Quick-drying, flowable Calcium Sulphate Screed. June 28, 2022. BREEDONFlow® Swiftscreed is suitable for floating, bonded and un-bonded flooring systems, including most underfloor heating systems and all. . Thanks to its waterproofing qualities, it is widely used in construction. May 6, 2007 #1 I've taken up some old thermoplastic floor tiles laid in the early 70's. Screeding paint price in nigeria - Floor screeds even on a concrete slab are laid each time a developer has finished the slab concrete. After this screed should be laid to protect the membrane. Mastic Asphalt Screed should be laid directly to the primed concrete/ sand & cement screed wherever possible. A minimum 0. g where the free standing cooker was) are all indicative that there wasn't parquet on the floors and that it isn't a DPM. This should consist of 1 part cement to 4 parts clean coarse sand by volume and be finished with a wooden float to a smooth surface. Mainly in one area only 1-2m2, so hoping I can just clean them off and re-glue with lecol 5500. An easy-to-use floor levelling compound – just add water in correct quantity as directed, mixing with a suitable Mixing Paddle and Drill for a minimum of 2 minutes Absorbent surfaces – Concrete and sand/cement screeds must be primed with Setcrete™ Acrylic Primer diluted in the ratio of 1 part primer to 7 parts waterBituminous Membrane. This site contains a wealth of information on our extensive product range, along with a selection of videos demonstrating their application. Once you break through to concrete level an SDS brings it up in lumps. We had the tiles tested and they definitely contain asbestos. screed definition: 1. 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. Fixit Pidipoxy EP Dr. Latexplan No Ammonia is suitable for levelling differences in thickness between 3mm to 10mm on new and existing substrates. To be completely honest it's a nightmare to get up when still sticky. The first method requires the screed topping to be hard so that a scabbling machine can be used to remove the top layer of the screed surface, which contains the bitumen. However, bitumen floor screed can suffer from damage over time. Removal of Asbestos Bitumen Glue & Adhesive: Cost + VAT. Method 1. Is there any way we can screed over the bitumen?Or is there a damp proof product that can go over the. Works on any subfloor – Ardex 2-part self-levelling compound can be applied directly to pretty much ANY floor substrate including, Bitumen, Old adhesive residues, Concrete floors, floor screed, Quarry Tile, Ceramic Tiles, Porcelain Tile, Terrazzo, Floor paint, Plywood, No more ply and even Smooth/polished concrete. It works well in areas that need levelling and if there is a problem with insulation or damp and is a great. Asphalt/bitumen floor repair before screeding and fitting amtico . Firstly, apply WAKOL MS330 Primer DPM in one layer. Bitumen and asphalt pump; Semi-trailer floor-screed conveyor *Prices are pre-tax. I have attached a photo after removal. The holes can be filled with a liquid bitumen or epoxy based floor filler. Floating engineered wood is ok. I am having these removed after being convinced by others to screed over - luckily only one bedroom and hallway was completed. This type of screed consists of the ingredients bitumen, sand, chippings and stone dust. It applies to all building types. Our costs are ballpark averages – get a local tradesperson to quote now. #3. 2. Suitable for use with underfloor heating and for encapsulating electric cable undertile heating systems. When it is expressed in the basic SI Unit of mass (kg/m 3), it is usually referred to as density, but when expressed in terms of weight (kN/m 3), it is usually referred to as unit weight. It is probably a low content, eg. Cement screed is the most commonly installed type of screed and averages around £12 per sqm. A few floors were finished with wooden blocks laid in bitumen. It is probably a low content, eg. A. Firstly the floor is covered with a thin layer of primer which allows the screed to adhere correctly to the floor. 2. allatt champion screeds 600a 3 piece screed part # description qty alternate oem# ala70001 screed plate 8ft 1 10347185 ala70290-1 screed ext. Fixit Pidicrete WP 19 – 24 Dr. The cost of flow screed is between £10 and £16 per square meter, based on a 50mm thickness and a daily coverage of up to 1,500 square meters. Answered 22nd Aug 2016. mastic asphalt can be poured, distributed, and installed in its final position with an installation machine (mastic asphalt screed or road paver), and thus need not be compressed. 1. Asphalt crews rely on the screed to ensure surfaces are smooth, properly textured, and ready for compaction. surprisingly the bitumen actually snapped cleanly a bit at a time. DownloadsHomeDownloadsAll downloadsCertificatesSafety data sheetsData sheetsDoPBulk Asphalt / Aggregates CertBulk & Packed Cement & Lime CertMortar, Blocks, Screed and Packed MarkingBrochuresContractor guidesSupplier Accreditation Information BBA Certificate ULTIFLEX 6MM BBA Certification ULTIPAVE 6mm BBA. It has an interesting chemistry, with different forms used for different purposes, but in the paving trade, it's most common use is to 'beef up' mortars and concretes. Easy-Melt is a high grade bonding bitumen, supplied in easy to handle 10kg shrink wrapped blocks. Moreover, concrete provides a more rigid and even surface for the tile installation. Blocks Aircrete, dense, aggregate, trench and concrete blocks for building. Otherwise, if the surface is irregular, it is better to use the liquid membrane, even on the old cover. Floor Coating Range or Neroflor - Discover our wide range of industrial floor coatings designed to protect and enhance your floors. Whether you need some new asphalt flooring installed or repairs to an existing asphalt floor Heritage Asphalt can help. The total membrane thickness is 4 mm and minimum weight. asphalt, quarry tiles, internal steel floors, ARDEX Damp Proof Membranes, porcelain tiles, flooring grade plywood etc. e. Balconies, Walkways and Terraces; Podium Deck Flooring Solutions; Internal Flooring Solutions; Paving Solutions; Floor Components – Accessories. FREE next day delivery available, free collection in. Country of Manufacture: United Kingdom. b. #2. There may be a minimum call out charge so you should check by speaking to a member of the team. However, when levelling timber floors, or screeds containing underfloor heating then only fibre-reinforced products are suitable i. . Thanks for the response. It may be applied onto either a solid in-situ concrete ground floor slab or onto a precast concrete floor unit. Water leaking under the walls and floor can damage the substrate. Browse short-form content that's perfect for a quick read. Fixit Novolac EP Dr. My 1950's ex-council house has a bitumen type floor in the kitchen which has discoloured the white vinyl floor tiles (a yellowy brown colour). If used as an underlay for , two coats may be required. mumbai. Cat asphalt paving machine - Floor screeds even on a concrete slab are laid each time a developer has finished the slab concrete. To help determine the. Anhydrite liquid screed works perfectly with projects involving underfloor heating systems due to faster drying times, faster self-curing and the ability to pump the liquid screed. #1 Hi, for my living room floor theres about a 4-6 inch concrete base and on top of that theres about 20mm with some kind of screed, bitumen or asphalt hard. An easy-to-use floor levelling compound – just add water in correct quantity as directed, mixing with a suitable Mixing Paddle and Drill for a minimum of 2 minutes Absorbent surfaces – Concrete and sand/cement screeds must be primed with Setcrete™ Acrylic Primer diluted in the ratio of 1 part primer to 7 parts waterBituminous Membrane. We have everything from epoxy repair mortars, flexible fillers, self-levelling screeds, emergency pipe repair kits and road repair products to ceramic pipe repair. Asphalt floor screed is made by combining specific bitumens and aggregates with limestone filler. Bitumen is often part of the floor structure for screed. There are two main types of floor screed currently used: Sand/cement floor screed ; Pumped anhydrite floor screeds ; Conventional sand/cement screed uses a relatively strong mix (1:3 cement to sharp sand) with a fairly dry, almost powdery consistency. r. Ground Floor - Most floors were concrete, often comprising a layer of hardcore (often industrial waste), a 100mm concrete slab and a granolithic screed covered with thermoplastic tiles bedded in bitumen (often with no separate DPM). Moreover, the screed and LVT will prevent moisture evaporation, further exacerbating the problem. Iam a floor layer with 25 five years experience. 2. 3 Terms and definitions 1. This has left a black bitumenous residue on the concrete screed and I'm concerned about tiling.