Can be used as a Damp Proof Membrane on sub-floors not under hydrostatic pressure. Build the external leaf first and then paint it with a liquid DPM (eg Black Jack DPM) and then build the internal. I need to self level to the depth of 30mm graduating to 0mm over a 4m squared area. 23 Jul 2018. Liquid Epoxy DPM. It is laid on top of a subfloor to keep moisture at bay and ensure natural timber. Quantity: FREE Click & Collect within 30 minutes. An effective liquid damp proof membrane resistant to a wide range of chemicals, it is used for oversealing cementitious surfaces which contain high levels of residual moisture. Safe – no solvents and non-flammable. St) SF don't sell it. Spoke to building control who confirmed that the bitumen is the only form of dpm. Two-component, single coat application, damp proof membrane for controlling residual and constructional moisture in cementitious substrates. In a house with a DPM already installed you will have a few inches of concrete to weigh the dpm sheet down. It is black when wet, but becomes black when dry. Jord86 Screwfix Select. Liquid DPM & Gas Barrier (DrySure) 5L. Liquid-Applied Membrane. SikaBond® Rapid DPM is a single part moisture curing polyurethane. Drybase® Liquid applied DPM is a single pack barrier coating for above ground use. Fosroc Nitoflor DPM is a two-component, solvent-free liquid applied surface damp proof membrane and residual moisture suppressant for concrete floors. I need to self level to the depth of 30mm graduating to 0mm over a 4m squared area. Suitable Application. Typical industry surface applied DPM. It is supplied ready to use. Tape or tie the string to one side of the room. Hugh James explains why. A decent fitter will test the slab for you before fitting anyway. The DPM and adhesive will work in unison to improve the overall level of moisture protection. g. It is also referred to as a moisture suppressant and is applied to a subfloor when the moisture levels are too high before the installation of a self-levelling compound. Primer 1. Kitchen is in a lean to, with no damp proof membrane fitted. Discover important FAQs including what is liquid DPM, what is the best liquid DPM and more. With a consistency similar to that of thick emulsion paint, it's suitable for use on solid floors, embedded timbers and walls. Liquid dpm would do a job if you have a good clean floor and no existing damp issues. 100m² per roll. Old laminate flooring is coming up, and underneath the laminate the underlay is very damp. The product can also be used to protect retaining wall structures. h. The polyethylene needs to be curled up at the edge of the area to be screeded and stuck to the walls. Drybase Liquid-Applied DPM is water-. Polymer based liquid DPM to resist the penetration of gases (including radon), vapours and liquids. Beam and block floors may need a levelling screed or grouting to ensure base level. £30. g. Sikabond Rapid Liquid DPM for Wood Flooring. 45sqm to supply and fit. Drybase Liquid-Applied DPM is a single-pack barrier coating that is supplied ready to use. Facades Tile Fixing Flooring Systems Technical Mortars Check all Uncheck all. This is supported with netting tacked into place. It is applied directly to the floor, creating an impermeable layer that keeps water within the concrete slab. Overall, investing in a liquid damp proof membrane for your concrete floor is an excellent way to protect your investment and ensure your floors last for years to come. Suitable for underfloor heating. It needs to have a further coating to protect it from damage. Liquid resin primer and dpmthen any flooring can be laid over this. Clean quarry tiles. £18 - £22 per m2. #1. Damp proof membrane (DPM) taped at the edges and anywhere it is joined. I’d look up the manufacturers guidelines if I were you because if the floor warps at all then you’ll have no recourse with the manufacturers as they’ll say there was moisture present. 5%CM (~ 4% Tramex) for a concrete subfloor indicates that a suitable damp-proof membrane must always be installed – either a 2 coat/2 part liquid layer (e. Run a string across the ground. Fast drying screed cost. , Jan 22, 2021. A damp proof membrane is primarily used on solid material floor constructions and it is designed to act as a waterproof barrier, preventing moisture from travelling into other. Add for Delivery. The dpm resin, is a sticky gooey 2 part epoxy based liquid to be precise. However, should there be a particularly high water table/pressure and/or a particularly porous floor, two coats. - finish with a self levelling compound. 00 Inc VAT. The product can also be used to protect retaining wall structures. I wanted to self-level the floor using mapai ultimate leveller 1210 and Secrete Ulitmate Primer for adhesion. £20 per m2. You also mentioned that there are vinyl tiles over the floor. Rewmar MS650 is a one part, modified silane based flexible wood flooring adhesive. Guarantees the early laying of all floorcoverings. The specific liquid DPM system will depend on the type of substrate or screed. • Protect from ground gases such as Radon and Methane. Suitable as a damp proof membrane on solid concrete floors. Prices will vary on floor area, depth of screed and site location. I would liquid DPM first after giving floor a good sweep and hoover to remove loose material, Black Jack by Everbuild is good, 2 coats recommended, follow instructions on tin. Apply ARDEX DPM 1 C to protect the floorcovering installation from residual construction moisture and ground bearing moisture. Once dry, Arditex NA, a latex based self levelling compound, was applied. applying 2 coats of Drybase® Liquid DPM. Drybase Liquid-Applied DPM is a single-pack barrier coating that is supplied ready to use. Upgrade your underfloor heating installation with one of our high-quality liquid DPM products from top brands Ultra Floor, Tilemaster Adhesives, Ardex and Mapei and experience the ultimate in moisture. Larsen Universal Epoxy Flooring Damp Proof Membrane. Odourless, rubber-enriched bitumen emulsion. Ideal for waterproofing structures, such as culverts, retaining walls and bridge abutments, this Black Jack DPM is also commonly used for general waterproofing. Suitable for the damp proofing of interior masonry wall surfaces. Drybase® Liquid-Applied DPM is a single-pack barrier coating for above ground use. Add to basket. Stack Exchange Network. SikaBond®- Rapid DPM is a solvent free, single part moisture curing reaction polyurethane primer and damp proof membrane for cement-based substrates. Sika primer MB or Sika-Bond Rapid DPM) or, in the case of a floating floor, a properly installed heavy-duty, non-permeable plasticThe liquid DPM coating dries to a flexible membrane with high crack-bridging properties, airtight values and adhesion. Jord86, Jan 14, 2023. Hydra Flex – Flexible Tanking Membrane. Out of stock. Suitable for all areas of a home, DPM is available in a choice of fabric and liquid forms. I plan to tank the walls too, but want to know if I should treat the breeze block walls with a chemical DPC first?. Liquid DPM's for floors are not designed to stop rising damp. Hello, Now that i've decided to lay laminate flooring through my hallway and dining room, i now have to decide on which underlay to buy. Drying time of any brand and type of liquid DPM varies according to the application circumstances, e. If a DPM has failed or perhaps was never installed in the first place, the features. 22 August 2019 at 10:27AM. When it comes to floor screed, liquid options are shaking up the normally sedate screed world. Drybase Liquid-Applied Damp-Proof Membrane High-strength damp-proof coating for a wide variety of applications. Labour costs. 33. EP40 Epoxy Floor Coating – Grey. Liquid DPM 5L Rating: 100%. This is one of the reasons liquid DPM’s have emerged as a more advanced and popular solution. £300. – Adhesive can be applied directly on top. I was thinking of using a liquid dpm then self. • Weatherproof protection for walls, above-ground structures and foundations. Cement based coating for preventing water and damp penetration in walls and floors. Find a stockist. 4M X 5M 500G Clear Heavy Duty Polythene Plastic Building Dust Rubble Sheet DIY. To be honest it’s worth having some sort of moisture suppressant put down just to make sure. Test Area Because of the wide variety of possible substrates and site conditions, it is always advisable to check adhesion to the background by testing on a sample area before starting any job. Drybase Liquid-Applied DPM is water-based. It helps stop moisture passing from one to the other. 7. It still might not have a DPM under the floor. CaCl Test. . It is available in black or white with a consistency similar to that of thick emulsion paint. #3. With a consistency similar to that of thick emulsion paint, it's suitable for use on solid floors, embedded timbers and walls. Drybase® Liquid-Applied DPM is a single-pack barrier coating for above ground use. Hi, I need to use liquid DPM on a floor prior to fitting some underfloor heating. Once applied, the product cures to form a membrane that is flexible and elastic. Using this latex based damp proof paint as a damp p. Cost. 22 Apr 2013. Then SL, this will take care of the craters and uneven sections from remaining tile adhesive. Another option is the PermaSEAL Liquid DPM, a two-coat barrier coating designed to protect both floors and walls from moisture. Looking lay a liquid dpm in the cellar floor followed by a self levelling compound as it uneven. The moisture readings taken at the time were 120 and 85, although the 120 reading was due to fresh concrete having recently been laid to level. Basically it was laid like this: timber frame built on top of garden dirt. If you lay a liquid dpm, you need to cover the walls as well, for the same reason. Mapeproof One Coat is used on cementitious floors with residual or constructional moisture levels of above 75% RH and below 97% relative humidity prior to the installation of resilient. U-values of around 0. Wet underfloor heating. Application of a liquid dpm after extensive sub - floor preparation, the sub floor being a new build extension, we had to make up 30mm to level floors, becau. This enables earlier access onto the floor for the application of screeds, coatings and other floor coverings including tiles, vinyl, wood and carpets. • 5L tin offers coverage of approximately 6. 60 per L. You are essentially painting a concrete floor, after all! But it is an effective way to do it. Odourless, rubber-enriched bitumen emulsion. Flaking paint, peeling wallpaper and crumbling plaster are just a few of the many symptoms which can originate from rising damp in buildings. Provides a flexible and resilient barrier to penetrating damp on walls and floors. How to apply Damp Proof Paint. The Drybase range of liquid-applied coatings including Drybase ECS Epoxy Floor Coatings and Drybase Liquid-Applied DPM can be applied directly to damp floors to create a damp-proof barrier without raising the floor level. Flooring FAQs. Pouring liquid screed. Developed to suppress residual construction moisture in cementitious subfloors including power floated concrete and sand/cement screeds. Drybase Liquid-Applied DPM A ready to use liquid-applied damp-proof membrane. 6 m2 1. My plan so far was: - fix up any cracks and dodgy bits in the current concrete floor. duncan303 Posts: 305 Forumite. The engineer (who is a bit belt and braces) recommended a block and beam floor supported by new foundations so as not to add extra load to the existing 1930s foundations. Two Pack. The product may also be covered. 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. Share What is a liquid DPM? A liquid DPM (damp proof membrane) acts as a barrier to suppress residual moisture in a subfloor. If a DPM has failed or perhaps was never installed in the first place, the features. Primer to the surface and allow to cure. 00. One Abocrete kit with sand covers approximately 28 sq. The liquid floor is perfectly level and should be walkable. There are numerous contractors nationwide that will. Its easy application and quick drying times make it a convenient choice for all your wall coating needs. Insulation sheets and steel laid on top of plastic membrane. STOPGAP F78 impedes the passage of residual construction moisture from affecting subsequent floor covering installations, therefore. Once applied, the product cures to form a membrane that is both flexible and elastic. DPM’s can be applied to either a suitable blinding layer under the slab or internally to the top of the slab. About this product. Then you need couple coats of diluted SBR to aid adhesion between DPM and leveller. 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 -. A better solution is to lay a 3 mm membrane. A Liquid Epoxy Damp Proof Membrane (DPM) is often used as a remedial solution where an existing DPM has failed or was never installed. The VPU-155 S is a versatile primer easy to apply by either trowel. Hello, hoping someone can help. Most important thing here is to prime the bitumen and concrete repairs to get a good bond between tile adhesive and floors. Liquid resin primer and dpm Liquid DPM on concrete floor. Add to Cart. Manufacturers will be able to advise. When under floor heating is being used it is advised that floors should be highly insulated for optimum performance of the heating system. floors. #1. A vapour barrier, on the other hand, is a damp proofing product attached to a wood floor underlay to reduce moisture passage. DPM Floor Membrane above Concrete Two popular options are liquid epoxy DPM and slimline floor membranes. The floor has been coated but the coating does not run up the wall. Screwfix Select. Liquid-applied membrane (LAM) is a monolithic, fully-bonded, liquid-based coating suitable for many waterproofing and roofing applications. It should be folded into the. Consideration should be given to applying the DPM to the top of the. Merseyside. For example, if there is a significant problem with damp rising through your quarry tile. Wait until the first coat of liquid DPM is touch-dry - approximately 15 to 30 minutes at 20°C – before applying the second coat at right angles to the. Step-by-step guide for how to apply liquid DPM for concrete floors. Drybase Liquid DPM is a remedial water-based coating commonly applied internally to above-ground floors, and can also be lapped up the wall internally from the floor to the DPC to ensure. The permanent solution for damp proofing floors • Forms a reliable surface damp proof membrane (DPM) on damp concrete floors • Waterproofs cracks & rising damp on solid floors • 1x 1kg epoxy activator pack • Fraction of the cost of new concrete installation • Domestic, industrial, agricultural & retail applications • No more. Apply the first coat in one direction, ensuring that the material is worked well into the substrate. Use 1000 gauge or thicker – ideal for this is the polyethylene use for the DPM under your concrete subfloor. DIYDave. The product is applied in two coats. 1-part, ready to use. The coating cures to form a rubber-like elastomeric waterproof membrane and may be applied over many substrates, including asphalt, bitumen and concrete. Information Liquid Waterproof Membrane. Alternatively, dilute the first coat of Drybase® Liquid DPM with 30% water for use as a primer. weberfloor DPM is a two-component epoxy based chemical damp proof membrane that is capable of being applied in one coat, dependent upon the condition of the substrate and quality of workmanship to ensure full coverage is achieved at the required thickness. Applications Visqueen Liquid DPM is suitable for use as a general purpose. Correct. Description. I am in the process of improving our kitchen. Old coal cellar, half is decent concrete but the other half has a bitumen type coating already. Using a roller, you can lay a seamless barrier and it's fully cured within 30 minutes. Ready-to-use. The product is applied in two coats. The edges of the DPM should have been flopped up the walls, say, 300mm and later trimmed back to suit. Mapelastic AquaDefense provides a thin, continuous barrier to protect adjacent rooms and floors below from water damage. Iam a floor layer with 25 five years experience. It protects a subfloor, keeping it warm and dry for long-term use. Black Jack liquid DPM is a ready to use, odourless, rubber enriched bitumen emulsion which provides a highly effective sandwich damp-proof membrane for floors. – When applying over 6mm of levelling, 2 primer coats may be required. Cement screed is the most commonly installed type of screed and averages around £12 per sqm. 30mm. If a screed such as A38 or Topcem was used, this can reduce the drying time, and with A38 this can be just one day. The liquid membrane forms a strong seal and makes a permeable layer to enable moisture to evaporate off. 7. Tanking should be provided wherever a floor level is below ground level. Can be over painted after 16 hours with most types of floor coatings. Checkatrade offers the following guide: Electric underfloor heating cost. . As far as I can see, there are two types, the Epoxy DPM and the bitumen DPM. /1000sq. The specific liquid DPM system will depend on the type of substrate or screed. The installation of a liquid damp proof membrane is a vital stage in the construction process, for both new builds and refurbishment work where a structural DPM may be missing or damaged, or where residual construction moisture is present in the floor. liquid DPM - onto the original hard floor. This is supported with netting tacked into place. #5. See moreRFC Epoxy Damp Proof Membrane is a professional 2-component applied surface primer for brushing onto concrete floors and. If the DPM Primer is being used. An ARDEX Damp Proof Membrane will protect the floorcovering installation from residual construction moisture and ground water vapour, where readings of up to 98% RH are measured. To provide additional insulation, tongue-and-groove wood-fiber board. . Select the department you want to search in. Waterproof. Can be easily applied by brush. 22 Feb 2007 #1 I wanted to self-level the floor using mapai ultimate leveller 1210 and Secrete Ulitmate Primer for adhesion. The opposite really. Ball F78 Stopgap 1 Coat Rapid Liquid DMP 6kg. Last edited: Sep 2, 2010. If you have a concrete slab below the level of the dpc in the wall, if you raise it over the dpc you will bridge the dpc in the wall, so allowing damp to get into the wall. #4. Suitable for extensions, basements and cellars. The liquid membrane forms a strong seal and makes a permeable layer to enable moisture to evaporate off. 00 Excl. In most cases the surface to be screeded will consist of 50 to 100mm-thick layers of insulation boards over a DPM (damp-proof membrane) on top of the floor structure. All you need to do is apply this coating with a brush and. PT Flooring Specialists. 4- When dry (24hrs+) you can give first coat of dpm (F75) 5- Second coat of dpm (f75) when first is dry. 100% solids, high build coating. FREE next day delivery available, free collection in. ON AVERAGE: £20 – £40 PER SQM. Technoseal Damp Proof Paint is a ready to use, SBR based, liquid damp proof membrane (DPM) which provides a seamless barrier against water penetration, radon, gas methane and carbon dioxide. Above or below ground, damp can creep up on you. ARDEX DPM has excellent. Bostik's damp proof membranes provide essential moisture mitigation and suppression for subfloors, helping to protect your installation for years to come. Ball offers a complete system for the measurement and control of subfloor moisture. Total carbon usage. Drybase® Liquid-Applied DPM Is suitable for use on solid floors, embedded timbers and walls. I would advise a single part flexi tile adhesive on top which will enable you to have stone, ceramic or porcelain tiles fixed. This water-based compound can be applied to damp concrete floor slabs, screeds and walls. Drybase Liquid-Applied DPM is water-. Moisture vapor resistant up to 10 lbs. Iam a floor layer with 25 five years experience. If you notice a gap between the straightedge and the floor, your floor is dipping in that area. The product is applied in two coats. You are essentially painting a. Hi, We've just finished pulling up old quarry tiles ready to fit new Porcelain tiles throughout! Had to remove quarry's due to levels of external doors, were unsure what the subfloor is beneath the quarry's, I believe the property is prone to rising damp seeping through subfloor as no DPM. There are numerous contractors nationwide that will. Hardcores varied in quality - many have since proved to be totally unsuitable. Consideration should be given to applying the DPM to the top of the. 57,050 Kg CO 2. applying 2 coats of Drybase® Liquid DPM. Our costs are ballpark averages – get a local tradesperson to quote now. starstarstarstarstar. Insulation sheets and steel laid on top of plastic membrane. This liquid damp proof membrane is ideal for concrete floors, basements, walls, tiling, water storage, and silage storage. com. Can be used over underfloor heating. Altro Wood™ adhesive-free (5000m²) Altro Wood adhesive-free. wet-rooms and concrete floors. Drybase Liquid Applied DPM A ready to use liquid-applied damp-proof membrane. In most situations, it is advised that if a Waterproof Surface Membrane (WSM) is required, it is applied directly to a subfloor prior to the application of a levelling compound. The installation of a surface DPM. The bitumen stuff (Black Jack seems to be the most common) is much cheaper. Description. It varies in depth from around 12mm to 15mm. Limitation: Do not directly bond wooden flooring to Drybase® Liquid-Applied DPM coated concrete. When fast-track tiling is required consider the use of a Damp Proof Membrane such as BAL DPM. DPM is also suit-able as an adhesive for wood block and mosaic panels, insulation boards, expanded polystyrene, cork and as a plaster bonding agent, even on difficult surfaces. ON AVERAGE: £20 – £40 PER SQM. USES Commonly used in the following areas: Providing sandwich damp-proof. If you have a engineered. A damp proof membrane creates a barrier to prevent moisture from rising and damaging or affecting an area. Damp proof membrane (DPM) taped at the edges and anywhere it is joined. Bonds directly to metal, PVC and ABS plumbing fixtures only. No problem when it is ventilated, soon as you remove the ventilation by covering it with a non-permeable substance (vinyl floor, liquid dpm) then the damp (and mould) will recur. Once applied via a roller the compound creates a barrier between the concrete and wood flooring. Drybase Liquid-Applied DPM is a single-pack barrier coating that is supplied ready to use. If you are using full contact adhesive to stick down your new wooden floor, a broadcasting of Kiln dried sand as you apply the 3rd coat of the Liquid DPM, will act as a superb adhesion promoter, if for example you use Lecol 5500 adhesive or Sika. The advice of the under floor engineer should be consulted before installation of the insulation, particularly when installed below a slab. Thin; only 40 mil. #5. BAL DPM is resistant to water, chemicals, grease and pollutants, and can be used internally or externally either as a DPM, primer, waterproofer or. You have maybe 3mm of smoothing compound hence it can be pushed up and fail. Liquid Epoxy DPM. 100% epoxy solids. In subfloors with readings in excess of 75% relative humidity (RH), the use of surface membranes will suppress residual moisture, which can dramatically shorten project schedules. How to Damp proof a floor and walls using synthaproof as a damp proof membrane is shown in this tutorial. Each liquid damp-proof membrane has different characteristics and protects floors against a variety of problems. £107. Also avaliable Supply only and Fitting/Installation Service. Maximum bond can be achieved by vigorously brushing the primer coat into the floor substrate using a stiff bristled broom. we sell the following epoxy resin DPM products:. This enables earlier access onto the floor for the application of screeds, coatings and other floor coverings including tiles, vinyl, wood and carpets. It should be folded into the. the wooden floor is laid. The cavity allows moisture within the floor to evaporate and the. I'm looking for opinions on the best self leveling screed to use on my slightly wonky concrete garage floor. Fully isolate the dampness in the floor using a surface Damp Proof Membrane (DPM) How much should DPM overlap? The purpose of DPM Care must be taken to ensure a) there are no holes or tears in the sheet that could allow water penetration and b) there is a sufficient overlap of sheets by at least 150mm should more than one sheet be required. Can be over painted after 16 hours with most types of floor coatings. This told us tha. Can be used as a Damp Proof Membrane on sub-floors not under hydrostatic pressure. Hardens in 1-5 hours depending on temperature. Why don't you use liquid dpm and tank the floor and part of the wall were the floor joins ,4 inches of screed is fine lay 2in first well trodden and then the second 2inches , job done ,if you feel 4 in is a bit much place insulation 35mm and then screed , chicken wire as well deacon,. It can also be used to isolate embedded timber joists or to act as a. Order online at Screwfix. Applying Damp Proof Membranes. This Epoxy DPM is a two-component, solvent-free, low odour epoxy resin membrane that is tolerant of residual moisture in concrete floors. This damp proof paint is supplied in 5 Litre containers, available in White or Black. Brief background: After buying a 1960s semi in south Birmingham house last year, and spending the summer managing (a) complete rewire; (b) installation of satellite and Ethernet wiring to all rooms; (c) plastering to make good chasing from (a). • Apply a primer and then pour a latex or water-based levelling compound to a minimum. Subfloor moisture measurement tools include the Protimeter Aquant or MMS for instant indications of potential moisture levels. A damp proof membrane creates a barrier to prevent moisture from rising and damaging or affecting an area. Chimney damp proof course (labour and scaffolding not included) £75 per roll. Then if solid floor, Mapei Ultimate, SF, on special at moment and yes it’s available - again, click and collect only. Developer has quoted £3744 for approx. Ask the expert: Can a Floor Levelling Compound be applied underneath a WSM? The nature of a subfloor impacts whether a WSM or levelling compound should be applied first. It should accommodate 0mm to 5mm (or thereabouts) It will cover an area of 26m2 (4m x 6. For instance, our. Also forms a barrier to carbonation and ground gases. £89. 4M X 20M 1000G Clear Heavy Duty Polythene Plastic Building Dust Rubble Sheet DIY. It is also suitable for application on damp surfaces, such as sand/cement and cement floors subject. For a self-levelling screed a system such as Flowcrete UK’s Hydraseal would be used. The product is applied in two coats. Covers approx. . 2. . 2 coats SBR. It is used to suppress residual moisture in concrete and sand/cement screeds allowing early installation of floor coverings. Ground bearing concrete floors - 1960s to 1990s. 28 Kg CO 2. Floors can also be susceptible to moisture ingress, especially concrete floors. Design considerations General When choosing a PIR board for a floor insulation project, care should be taken to ensure: That the product is suitable for the intended application (check the individual manufacturer’s data sheet). The plan was to lay American Black Walnut but the hallway floor was not level. kez, Apr 22, 2019. 1. jay said: As above you may find it difficult to find a tile adh manufacture who will grantee their product over the membrane. Membranes. [3] 4. Perfect for treating commercial or domestic wet rooms before tiling. Solum Treatments The solum of a property is the subfloor base of the property (level under ground floorboards). No need for a separate primer. It combines excellent adhesive, elastic and waterproofing properties. For traditional screed, the usual total will fall within the range £18. apply two coats of Drybase® Liquid-Applied DPM as normal. IKOpro Synthaprufe Trade is easy to apply and provides damp proofing for concrete floors, foundations and masonry walls below, at or above ground level. 41. To be honest it’s worth having some sort of moisture suppressant put down just to make sure. P. I have a fairly damp & uneven concrete floor, probably about 20 years old or more. Thanks. com.