Damp survey. It will tackle residual moisture in concrete up to 6% C. 0. Moisture vapor resistant up to 10 lbs. • Weatherproof protection for walls, above-ground structures and foundations. . . This enables earlier access onto the floor for the application of screeds, coatings and other floor coverings including tiles, vinyl, wood and carpets. Drybase® Liquid-Applied DPM Is suitable for use on solid floors, embedded timbers and walls. 16. Plenty of cement/latex/fibre based. I'm looking for opinions on the best self leveling screed to use on my slightly wonky concrete garage floor. Rapid DPM Can also be used for priming, consolidation of porous screed and isolation of old adhesive residues Coverage / Usage Approx: 0. Whether you need to cure a damp concrete floor with a liquid DPM or paint your garage we have a specialist paint product fit for purpose. Anhydrite screed usually costs in the range of £15 – £20 per sqm, mastic. Damp proof membrane for walls. 13 W/m2K dependant upon the p/a ratio Benefits of Insulslab Lightweight foundations Single point of contact from foundation to finished floor level Finished slab level Finished slab levelArdex do a excellent one and will that smoothing compound ontop as well , Instarmac also do one aswell and then use there smoothing compound ontop . No, I’m referring to the liquid DPM you put down today and you wish to lay flooring on tomorrow. ) so I am aiming for Bison +45mm as finished floor level. However, should there be a particularly high water table/pressure and/or a particularly porous floor, two coats. Because we were laying Karndean Flooring to a new extension we needed to check the % RH(relative humidity) of the concrete with a hygrometer. • Protects walls and floors from water ingress and dampness. Name. Drybase® Liquid-Applied DPM is a single-pack barrier coating for above ground use. For the best results, leave your screed to dry and fully cure for around 28 days, however a minimum of 7 days should suffice if you don’t have time to spare. Drybase Liquid-Applied DPM is a single-component two-coat paintable damp-proof coating that is easily applied to substrates by brush, roller, or spray. Containing the exact quantities of resin and hardener ready for mixing together, HYTEC E570 ONE COAT is designed to suppress residual construction moisture in cementitious subfloors, which enables floor coverings to be installed earlier in building. £96. Flaking paint, peeling wallpaper and crumbling plaster are just a few of the many symptoms which can originate from rising damp in buildings. In older properties built prior to the 1950’s normally the solum areas are unsealed and are possibly damp. Can be easily applied by brush. 100m² per roll. The absence of a DPM or the failure of a DPM, especially in areas with a high water table, can result in the pressure. Ive used my BASIC damp. evilgoose Posts: 532 Forumite. Liquid Applied Membranes ARDEX Product Property Guide 2. Spoke to building control who confirmed that the bitumen is the only form of dpm. Distributors Near Great Britain. Also avaliable Supply only and Fitting/Installation Service. I have an uneven concrete floor inside. Step-by-step guide for how to apply liquid DPM for concrete floors. popandu, Jul 17, 2015 #12. liquid DPM - onto the original hard floor. It’s primarily designed for brushing onto concrete floors and fine concrete screeds. DPM Floor Membrane above ConcreteTwo popular options are liquid epoxy DPM and slimline floor membranes. Now the floor is flat the DPM can be applied to seal the concrete. The installation of a surface DPM. It should accommodate 0mm to 5mm (or thereabouts) It will cover an area of 26m2 (4m x 6. The principle of tanking is to provide a continuous waterproof barrier or membrane; this is created using either mastic asphalt or proprietary adhesive DPM. Both are excellent and have used both on various projects and with excellent results. 7,856 1,619 113. Drybase Liquid-Applied DPM is a single-component two-coat paintable damp-proof coating that is easily applied to substrates by brush, roller, or spray. 6 m2 1. The polyethylene needs to be curled up at the edge of the area to be screeded and stuck to the walls. And yes you can level the floor after. We have a comprehensive range of membranes both lath and liquid, epoxy floor paint, and specialist tapes for every situation. h. A surface DPM, which bonds to the surface of the concrete, minimises moisture vapour transmission. Developer has quoted £3744 for approx. Types of Liquid DPM. The liquid DPM forms a continuous barrier that seals the surface and protects the underfloor heating system from moisture and damp. Before that it was F ball Stopgap green bag with 114 liquid 2 coats F75 DPM Green bag again. It is laid on top of a subfloor to keep moisture at bay and ensure natural timber. Speak with a. £2,000. How-to video with step-by-step instruction on how to apply liquid damp proofing, priming and then self leveling. This barrier is intended to stop moisture passing from one to the other. Effectively, a damp proof membrane (DPM) is used to create a barrier between a concrete (or screed) subfloor and a wood floor. My immediate thought would be to ensure the rest of the floor had a DPM or moisture suppressant, to give it the technical name. a suitable primer (depending on sub floor) should also be used. Polycote DPM Primer is a superb twin pack high-performance epoxy coating that is designed to penetrate into the concrete and completely lock the surface from rising damp. Drybase Liquid-Applied DPM is water-. Hi All, I'm purchasing a new build and want to put Amtico Spacia down throughout the downstairs. Showing 1–15 of 21 results. I went to buy compound to level it yesterday, and now it looks nice. This enables earlier access onto the floor for the application of screeds, coatings and other floor coverings including tiles, vinyl, wood and carpets. Exceeds ANSI A118. As far as I can see, there are two types, the Epoxy DPM and the bitumen DPM. 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. Hello, hoping someone can help. . Ipswich • Member since 13 Mar 2020 • 65 jobs, 100% positive feedback. If there is no dpm above the concrete floor a vapour control layer, such as polyethylene, should be placed between the. Floors: a damp proof floor paint that can be applied above and below screeds to provide a damp proof membrane. Liquid membranes may be used for basement tanking and damp proofing, plant rooms, podium decks and radon. Drybase® Liquid-Applied DPM is a single-pack barrier coating for above ground use. DIYDave. The product is applied in two coats. Forms. Coverage. #3. Up to 10 years warranty on selected items. If there was no dpm I would suggest a uniformal distribution across the whole floor. Polycote DPM Primer is a superb twin pack high-performance epoxy coating that is designed to penetrate into the concrete and completely lock the surface from rising damp. The liquid floor is perfectly level and should be walkable. Damp or Contaminated Floor Solutions. ARDEX DPM is a solvent free, low viscosity, two-component epoxy resin. take account of possible differential. Suitable Application. Consult technical documents (Link -> Larsen Liquid DPM) Larsen DPM Universal is a superior 2 pack epoxy surface applied liquid damp proof. CaCl Test. weberfloor DPM can be applied on to concrete or cement based screed. The Epoxy stuff seems a lot pricier than I was expecting. I've used the two part resin on a damp concrete floor in an old Victorian place. As you say, it needed to be painted up the wall much higher. If you would like to know more about the range of damp proofing and other products we have available you can contact us on 01329 235252 or via e-mail [email protected] 27, 2017. Guarantees the early laying of all floorcoverings. SikaBond®- Rapid DPM is a solvent free, single part moisture curing reaction polyurethane primer and damp proof membrane for cement-based substrates. A liquid-applied DPM (damp proof membrane) is a simple solution and an excellent way to damp proof a concrete floor. I wanted to fit LVT flooring or self adhesive vinyl tiles. rogerk101, Mar 13, 2020. Altro Wood™ adhesive-free (5000m²) Altro Wood adhesive-free. This is supported with netting tacked into place. Withstands 98% RH. 11 - 0. The second coat should be applied as soon as the first coat has completely dried (typically 18 to 24 hours). Ideal for fast track installations, apply ARDEX DPM 1 C R to protect the floorcovering installation from residual construction moisture and ground water vapour. 10 and A118. Sika Rapid DPM is intended for priming and sealing absorbent and non-absorbent subfloors, Also suitable for consolidating weak cement screed and isolating old adhesive residues. DPM’s can be applied to either a suitable blinding layer under the slab or internally to the top of the slab. Drybase® Liquid-Applied DPM is a single-pack barrier coating for above ground use. 50 /sqm. Hi Pete, I have the answer. It can be used as a damp-proof membrane on sub-floors that are not under hydrostatic pressure. It is supplied ready to use. A competent contractor with pumping equipment and knowledge of the screeding process. Before that it was F ball Stopgap green bag with 114 liquid 2 coats F75 DPM Green bag again. Typical values for moisture sensitive floor finishes are less than 0. Damp proof membrane paint is a liquid DPM that blocks the action of penetrating damp on floors, ceilings, and internal walls. For RH readings above 75%, the subfloor must be left to dry out further. £ 51. 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. Liquid epoxy DPMs are ideal for concrete floors, such as garages, where the original damp proof membrane is missing or has broken down. The floor was vacuumed before applying Aredx DPM IC, an epoxy liquid Damp Proof Membrane (DPM). 5m². 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. MAPEPROOF ONE COAT. Damp most often comes up through the floor. BAL DPM is resistant to water, chemicals, grease and pollutants, and can be used internally or externally either as a DPM, primer, waterproofer or residual m. The product is applied in two coats. This is a solvent, water free, epoxy resin and. Fast drying screed cost. Walkable in 4 hours. Cost. Insulation with be internal PIR. When using as a liquid DPM make sure the substrate is load-bearing, and that any laitance is removed mechanically (common on new concrete floors/screeds). < 2 Year Storage. The quarry tiles were the DPM. The floor is old concrete and dips ~25mm in the middle. Using a roller, you can. Sika Rapid DPM (Damp Proof Membrane) is a solvent free reaction curing resin for use on cement based substrates. Concrete is naturally very porous. The cavity allows moisture within the floor to evaporate and the. It is available in black or white with a consistency similar to that of thick emulsion paint. , 20 mils thick. that is compatible with the self level cement i shall be using. 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,. Acts as a water proofer for floors and walls, above ground structures and. In addition to our office based Technical Department, we employ a highly experienced team of 25 Area Sales, Contract and Business Development Managers, who are available nationally to offer advice, support and training, not just over the phone, but in person and on-site. Liquid Epoxy DPM. Consideration should be given to applying the DPM to the top of the. This means that water can rise up through capillaries, which can lead to damp floors and mould problems. - lay a liquid dpm. EP40 Epoxy Floor Coating – Grey. Features and benefits: One product solution for complete waterproofing. When dry, a sand/cement or concrete screed of ap-proximately 50mm thick is then laid over the EVER-WP60 Liquid DPM. Drybase White Liquid Damp Proof Membrane - 1L. Damp proof membranes can be used to help resolve damp issues which already. Lay and level the concrete slab, allowing sufficient time to dry out, as per BS 8203. € 80. Alternatively, dilute the first coat of Drybase® Liquid DPM with 30% water for use as a primer. The build up of a ground floor would typically be: DPM, Slab, Insulation, Vapour Barrier, Floor Screed. Rather than a liquid DPM you might be better using something that will continue to allow moisture out of the concrete e. 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. I am looking for some advise about laying a SLC with a liquid DPM. Drybase products have the advantage of being extremely easy to apply. Discover how and why you should be. Solum Treatments The solum of a property is the subfloor base of the property (level under ground floorboards). Developed to suppress residual construction moisture in cementitious subfloors including power floated concrete and sand/cement screeds. apply two coats of Drybase® Liquid-Applied DPM as normal. This water-based compound can be applied to damp concrete floor slabs, screeds and walls. It is used to suppress residual moisture in concrete and sand/cement screeds allowing early installation of floor coverings. A DPM on an external tiled area will protect moisture sensitive stone such as granite from staining due to rising ground floor water, as well as rain water. 3. STOPGAP F78 impedes the passage of residual construction moisture from affecting subsequent floor covering installations, therefore. 7. Assuming that the damp proof membrane (dpm) under the concrete has failed in areas then yes you possibly would get the odd patch of dampness showing in the floor. Capital Valley DPMs are also extremely durable. Drybase® Liquid-Applied DPM is a single-pack barrier coating for above ground use. I was only wondering about the waterproof PVA really. Damp Proof Membrane (DPM) is used to create a barrier between a concrete or screed subfloor and a wood floor. Hi Pete, I have the answer. I need to self level to the depth of 30mm graduating to 0mm over a 4m squared area. The most popular screed types include cement screed, anhydrite screed (also calcium sulphate screed), mastic asphalt screed and dry screed. Damp proof membranes are installed in all new properties as a way of protecting from damp. Not that it needs to breathe, but it already does so and there is no harm. DPM’s can be applied to either a suitable blinding layer under the slab or internally to the top of the slab. you cant put the dpm directly on to the. Typical solvent free adhesive. 5-25° Storage. We want to lay vinyl sheet in the kitchen. ON AVERAGE: £20 – £40 PER SQM. The bitumen stuff (Black Jack seems to be the most common) is much cheaper. The dpm resin, is a sticky gooey 2 part epoxy based liquid to be precise. Also forms a barrier to carbonation and ground gases. Accommodates Hygrometer readings up to 98% RH in one coat. 15 November 2008 at 4:54PM. Limitation: Do not directly bond wooden flooring to Drybase® Liquid-Applied DPM coated concrete. So I have a block and beam floor which is 150mm below existing floor level. Waterproof. Hi all, this weekend I plan on applying a liquid DPM and self levelling compound to my garage floor slab. Self levelling compound. No corner reinforcements required. Chimney damp proof course (labour and scaffolding not included) £75 per roll. Old coal cellar, half is decent concrete but the other half has a bitumen type coating already. 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. The stand-off studs create an air gap. 1-part, ready to use. F. Renovation property: £60 to £85 per square metre. Liquid DPM. Waterproof. 95. Surface conditioner/ primer: 1 coat, 100-200 g/m 25 to 50 square meters per 5 litre depending on surface. Well suited for use as a water and water proof barrier, beneath raised access floors, in plant rooms and bunded areas. 12. Epoxy Damp Proof Membrane Epoxy damp proof membrane is a coating that suppresses residual moisture in cement and concrete floors to speed up the process of installing floor coverings. DIYDave. Sikabond Rapid Liquid DPM for Wood Flooring. It is solvent-free, odourless. apply two coats of Drybase® Liquid-Applied DPM as normal. It is not suitable as a bond. Ideal for use where there is no functioning structural DPM (common in older properties). Cement screed is the most commonly installed type of screed and averages around £12 per sqm. 41. 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. . Description. Holds back rising damp where a damp proof membrane is either missing or defective. 17DW400. Drybase® Liquid-Applied DPM Is suitable for use on solid floors, embedded timbers and walls. I agree, looking at the liquid DPM's that Wickes do I'd say you'll struggle to get someone to guarantee tiling on them would be ok, sorry!Sika Code 487004. Can be applied to damp surfaces. 3. 8 litre per m2, carrying the treatment up the walls to join the existing wall DPC. Using Damp-Proof Membranes on Walls. Resin Floor Coatings UK. 70 Ex VAT. If you choose to lay the flooring straight onto the concrete then its advisable to carry out a damp test and if the results are more than 8% RH (relative humidity) then a liquid dpm will need to be used as well as a 3mm thick latex layer as most adesives wont bond properly to the dpm. Clean quarry tiles. Nitoflor DPM permits early overlaying with vinyls,. 100% solids, high build coating. Trying to find out how much it costs to screed a floor? In this guide, we look at all the floor screed prices for different rooms and sizes (per square metre), as well as different types of screed such as: Self-leveling screed. Tax: £18. Learn more about DPM Membranes for Concrete Floors . Suitable for use as an overlay damp roof membrane to cementitious surfaces which were laid without an underlaying damp proof membrane. These black DPM flooring membranes are designed to be unaffected by groundwater as well as interstitial condensation should it occur. Damp proof membrane (DPM) taped at the edges and anywhere it is joined. It is supplied ready to use. (DPM) above or below a ground floor slab to stop ground moisture reaching the upper surface of the floor. Concrete floors especially can create problems that can be more difficult to solve. 2. When fast-track tiling is required consider the use of a Damp Proof Membrane such as BAL DPM. A damp proof membrane creates a barrier to prevent moisture from rising and damaging or affecting an area. A damp-proof membrane is a layer of material usually laid below concrete floors during construction. Last edited: Sep 2, 2010. Search by distributor Kellaway Building Supplies Travis Perkins. This damp proof paint is supplied in 5 Litre containers, available in White or Black. weberfloor DPM offers damp proofing for concrete floors and cement based levelling compounds using an easy two-coat system. Damp survey. 00. then a liquid membrane goes over this called ardex dpm 1c. An MVS, is a moisture. Might be worth having the floor checked properly first though as it sounds like you may have existing problems going by what you have already said. It can also be lapped up walls to the DPC before the application of floor and wall coverings. 0. 99Inc Vat. PT Flooring Specialists. • Protect from ground gases such as Radon and Methane. Features. 2K should be considered. Liquid dpm’s are used to protect the walls and floors of a building from moisture and rising damp in just a couple of coats. Liquid-applied membrane (LAM) is a monolithic, fully-bonded, liquid-based coating suitable for many waterproofing and roofing applications. FREE next day delivery available, free collection in 1 minute. Because we were laying Karndean Flooring to a new extension we needed to check the % RH(relative humidity) of the concrete with a hygrometer. It has excellent adhesion to damp cementitious surfaces and once dried provides a dry barrier against moisture below. Liquid Epoxy Damp Proof Membrane 5kg (Metal Tin) Rating: 100%. Drybase Liquid-Applied DPM is water-. 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. An ARDEX Damp Proof Membrane will protect the floorcovering. It can also be used to isolate embedded timber joists or to act as a. Use on concrete floors as an alternative to polythene. ARDEX WPM 200 provides a surface applied water and vapour barrier to concrete, screeded, rendered or masonry surfaces, steel and other vertical as well as horizontal hard surfaces. DAMP-PROOFING FLOORS Apply by brush, a minimum of 2 coats, each at 0. Suitable for all areas of a home, DPM is available in a choice of fabric and liquid forms. Liquid DPM and waterproofing paint to waterproof and damp proof your property. Upper floors are airtight timeframe. It is low odour, solvent free, and most importantly deals with constant low levels of moisture in concrete floors. After hardening the ARDEX DPM produces a membrane with high inherent strength and excellent bond strength to appropriate substrates including very damp concrete and screeds. Liquid damp proof membrane (water based bitumen) applied in several coats directly to the concrete floor with a roller or brush. Browse damp-proof membrane products from Toolstation here. The advice of the under floor engineer should be consulted before installation of the insulation, particularly when installed below a slab. Chemical damp proofing cost. Screwfix Select. Can be used on walls and floors to prevent water ingress and dampness from the ground. This type of DPM was extensively used in Local Authority property [cheap and cheerful ?] but it tended to work, the problems arise where there are "breaks" in the very thin and now fragile what was a hot applied liquid, this liquid combined with the tiles and the tile glues managed to actually act as a DPM, the. Liquid Applied Systems. Add to basket. 4M X 5M 500G Clear Heavy Duty Polythene Plastic Building Dust Rubble Sheet DIY. 22 August 2019 at 10:27AM. Drybase Liquid-Applied DPM is a liquid-applied damp-proof membrane providing a barrier to damp and ground gases, such as. middle of a baking hot day in summer applied to a dry and subsequently warm surface, would take between 4 – 6 hours per coat. Ideal for waterproofing structures, such as culverts, retaining walls and bridge abutments, this Black Jack DPM is also commonly used for general waterproofing. £300. This is added at ground floor level and is generally covered with concrete. The product carries the CE mark which means that it meets the requirements of BS EN 13165. Liquid DPM 5L Rating: 100%. rogerk101 said: ↑. These attributes combined produce a unique multi-purpose liquid DPM with dozens of potential applications including but not limited to: • Damp proofing storage basements, where other tanking methods too costly • Damp proof paint for walls and ceilings • Concrete Floors: as a tough liquid floor DPM applied above or below screeds. Product code: 151457. hi yes the process is to first prime and screed over with a smoothing compound then liquid dpm to prevent moisture causing your flooring to fail then another smoothing screed over inc priming to bond the lvt down to. Step-by-step guide for how to apply liquid DPM for concrete floors. A water based product would have taken a month to dry, but. Visqueen Liquid DPM is emulsion based and free of solvents. Each liquid damp-proof membrane has different characteristics and protects floors against a variety of problems. Once applied via a roller the compound creates a barrier between the concrete and wood flooring. ft. Protects building surfaces from the effects of liquid and water vapour on floors and walls. Primer to the surface and allow to cure. and then apply a second coat with kiln. The problem is that around the edge of the room the flioor is cracked and loose. We used the Ultra Floor system, Ultra DPM-it,. Drybase Liquid-Applied DPM is water-based. MAPEPROOF ONE COAT. kez, Apr 22, 2019. Description. Refer to manufacturer’s guidelines. The best solution is to uplift the tiles and dispose of accordingly, then use a specialist screed such as F-Ball Stopgap 1200 straight over the bitumen. This type of DPM not only prevents dampness from rising but. is an odourless, rubber enriched bitumen emulsion damp proof membrane. 2- Prime floor with neat p131 on non absorbent floors and water down on absorbent sand cement etc (approx 1-3 mix) 3- Next self level the floor with an acrylic levelling compound. Tile brands such as Bal, Ardex, Tops, etc all sell tile primers with fancy names ! Can simply use SBR diluted, follow instructions on bottle, likely to be 1-4 water, then apply 2 coats. Drybase Liquid-Applied DPM is a single-pack barrier coating that is supplied ready to use. Apply ARDEX DPM 1 C to protect the floorcovering installation from residual construction moisture and ground bearing moisture. 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. I need to put down a damp proof membrane and self levelling compound on top of that. There is a DPM under the concrete as well, but primarily to keep the water in for curing. Like x 1; List; merit Well-Known Member. If the floor has no dpm, it'll have a damp history. DIYDave. 1-part, ready to use. Drybase Liquid-Applied DPM (1 L White) (In stock) ☆ ☆ ☆ ☆ ☆. It also permits early overlaying with vinyl. EITHER. Rapid Set Skim CoatRepairs, levels, and smooths concrete for applications. For a self-levelling screed a system such as Flowcrete UK’s Hydraseal would be used. Once applied, the product cures to form a membrane that is flexible and elastic. To provide additional insulation, tongue-and-groove wood-fiber board. USES For priming, consolidating and sealing of: Absorbent and non-absorbent sub-floors, consolidat-ing weak cement screed and isolation of old adhesive residues. The floor under each tile i have removed has been visibly wet, but has dried in a few hours of the tile being lifted. Liquid-applied membrane (LAM) is a monolithic, fully-bonded, liquid-based coating suitable for many waterproofing and roofing applications. Drybase® Liquid-Applied DPM Is suitable for use on solid floors, embedded timbers and walls. A liquid-applied DPM (damp proof membrane) is a simple solution and an excellent way to damp proof a concrete floor. – Adhesive can be applied directly on top. Old laminate flooring is coming up, and underneath the laminate the underlay is very damp. The waterproof paint membrane dries to a flexible. Pouring liquid screed over under-floor heating pipes – image courtesy of JCW Floor Screeding. Liquid Applied Systems. ARDEX offers a range of liquid or surface DPMs to protect the floorcovering from residual construction moisture and rising damp, when a structural DPM is damaged or missing. It can be used as a damp-proof membrane on sub-floors that are not under hydrostatic pressure. 23 Jul 2018. It, therefore, prevents moisture build-up beneath vinyl or other floor coverings. Applying Damp Proof Membranes. Background: I am currently renovating a 1950’s property with no DPM. Chemical damp proofing cost. so, typically for properties built before the 1970s we recommend that an epoxy-based DPM should be used on the ground floor to control moisture coming from the ground. 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. Add for Delivery. 45sqm to supply and fit. This told us tha.