Limitation: Do not directly bond wooden flooring to Drybase® Liquid-Applied DPM coated concrete. The DPM should: have sealed laps of at least 300mm wide. I've got to raise the floor up slightly with a deep base leveling compound. Add to basket. The only way to tell properly, is to carry out a proper test. My plan so far was: - fix up any cracks and dodgy bits in the current concrete floor. 15 m2 1. Plastic membrane laid with excess along the sides for lapping later. 33. Technoseal Floor DPM. I was only wondering about the waterproof PVA really. Virtually solvent free liquid epoxy resin damp-proofer. It had not been used for over a year to allow it to dry out. Synthaprufe Original exhibits low odour, with exceptional flexibility and crack resistance, even at low. DIYDave. Fitting floor insulation tends to be far more straightforward when starting from scratch in a new build or extension. I have noticed that the concrete floor isn't level (by about 5-10mm) and I want to fix it. rogerk101, Mar 13, 2020. 5" sand & cement screed 3 coats of synthapruf 4" concrete 1:3:6 6" hardcore well consolidated & blinded with sand I have two questions: 1. 186. If a DPM has failed or perhaps was never installed in the first place, the features. rogerk101 said: ↑. £30. It helps stop moisture passing from one to the other. • Protects walls and floors from water ingress and dampness. 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. Discover important FAQs including what is liquid DPM, what is the best liquid DPM and more. £. . ) chrysotile (white) asbestos fibres. The DPM above concrete should be protected by either screed or a floor finish unless it. Unfortunately the concrete floor is not levelled and is about 2-3 cm lower on on side of the room plus there are other uneven parts of the floor. Then 100mm insulation and 18mm ply as a floating floor system. 99. ) 4. Drybase White Liquid Damp Proof Membrane - 1L Drybase® Liquid applied DPM is a single pack barrier coating for above ground use. GaryTheTiler said: Sound like you don't have a damp membrane under the concrete or a leaky pipe under the floor perhaps. Screwfix Select. Browse damp-proof membrane products from Toolstation here. 00 Inc VAT. To apply liquid epoxy DPM correctly, build up multiple coats, always follow manufacturer's recommendations and ensure that the concrete surface is free of debris or organic matter. When laying a solid wood, Real Wood or laminate floor over a cement-based sub-floor, a paintable damp proof membrane should be used to prevent moisture penetrating from below. We have had a damp survey and it is confirmed that there is no issue with rising damp. 18 Aug 2023. 28 days or sealed when set with one coat of ARDEX HydrEpoxy WPM 300 at a coverage rate of 3. I would. Adheres to saturated concrete even at lower temperatures. 22 Feb 2007 #1 11,422. If the coating is not going to be the final decorative surface and a floor covering will be applied afterwards then a ready-to-use latex-based coating, such as. Walls appear to be dry & are mainly concrete block. Drybase Liquid-Applied DPM is water-. Ashbou10 Member. Mapelastic AquaDefense provides a thin, continuous barrier to protect adjacent rooms and floors below from water damage. 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. And damp can rise through it if not used. It might seem a bit unusual. 0. Chemical damp proofing cost. DPM Membranes for Concrete Floors ; Damp Proof Course; Damp Proof Paint; Rising Damp Treatment; Water Repellents; Vapour Control Layers; Internal Waterproofing;. - I'm wondering why the DPM is needed. Any help would be appreciated. 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. Clear. VAT. Discover important FAQs including what is liquid DPM, what is the best liquid DPM and more. Using pin m/m's on a concrete or s&c screed floor needs experience - more important is what is the composition of the slab or the in-situ screed and if there is an actual DPM below the floor. 00 Excl. The concrete floor is below the DPC level so currently gets damp. Property is mid 1960s, solid ground floor. Don't use a mix of manufacturers products because if you asked for a site visit due a failure, they'd automatically walk away. There is no damp proofing at all and the floor was a bit damp. If a radon barrier is required, lay this over the grouting layer and extend it. Hi, I have painted a bitumen based liquid DPM (not the 2 part epoxy types that most other posts are about) on my damp concrete floor (1950s bungalow with no DPM and on a hill with possibly high water table). A typical concrete floor build up that incorporates a VCL would be as follows. 2 coats SBR. There is a membrane underneath the concrete slab which has been poured and it comes up and meets the dpc. Most damp-proof floor coatings are applied directly to the concrete floor surface using a brush or roller. The bitumen is less than a millimetre thick - painted on by all accounts. 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. As long as your dpm is lapped and bonded with your dpc your internal floor level can finish higher than your dpc, although can cause issues with external door opening,generally your finish floor level would be gauged with dpc to finish at the same height. Remove all traces of the lino and glue and paint on a liquid dpm such as Sika or everbuild blackjack, then once dry latex the floor to try to feather the majority of dips and bumps out, then consider either a moisture resistant laminate with decent. It stops around 10mm away from the internal walls in all rooms. For RH readings above 75%, the subfloor must be left to dry out further. Liquid damp proof membrane (water based bitumen) applied in several coats directly to the concrete floor with a roller or brush. Accommodates Hygrometer readings up to 98% RH. Made from recycled materials. Jord86 Screwfix Select. or self level to adhere to. Day 3, mix and level. You’ll want to make sure that you over-roll. 1. Please Note: Most wood floor manufacturers state a maximum substrate moisture content of 2 % CM (ca. Low trade prices. Add to Basket. 5 odd inches. Use 1000 gauge or thicker – ideal for this is the polyethylene use for the DPM under your concrete subfloor. We have two system recommendations for new build installations. Barcode 5055047210603. 1 Feb 2010. The advice I was given was a liquid DPM to be put down on the concrete floor and then I will build the floor structure on top, it will be in contact with the floor via packers but the bottom layer as such will be a square of plastic to avoid. Using this latex based damp proof paint as a damp p. 30mm. 00 € 60. £51. that is compatible with the self level cement i shall be using. 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. :thumbsup. Tried and tested and it works. Walls: Can be used under render or plaster as a water barrier or. Property is mid 1960s, solid ground floor. £ 51. Thanks for the response. Check the condition of the concrete floor slab for imperfections. take account of possible differential movement. Sikalastic®-800 HA is a two component, solvent free, highly elastic, virtually odourless polyurea based waterproofing membrane. First scrape up as much of the residue as possible apply a cote of Ardex NA then the liquid Dpm and then another layer of Ardex NA. Old coal cellar, half is decent concrete but the other half has a bitumen type coating already. Robust - resistant to on site damage. #1. richel7. High performance, over-banding sealing tape system for postsealing and waterproofing of construction. Pour the resin into a clean, dry bucket. 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. How to apply Damp Proof Paint. The dpm resin, is a sticky gooey 2 part epoxy based liquid to be precise. This enables earlier access onto the floor for the application of screeds, coatings and other floor coverings including tiles, vinyl, wood and carpets. If the DPM Primer is being used. Water is added to ensure a thorough mix and to aid workability. 5 % Tramex). It might seem a bit unusual. It stops around 10mm away from the internal walls in all rooms. 00. New concrete subfloors or sand/cement screeds should be left for a minimum of seven. E. £750 - £3,000. The concrete slab was usually 100 to 125mm thick. The existing concrete floor can be used as a base, however a new damp proof membrane (DPM) will need to be introduced. You have a choice. 1200 Gauge DPMs should be used when a floor is direct to the ground. rifraf74. A ready to use liquid-applied damp-proof membrane. Getting someone to do a damp test to find out the relative humidity RH% of. Installing tanalised 4x2 soleplate 2" from the wall over the DPM but with a DPC below, screwing down through both into the concrete, then bringing the DPM up the back of the soleplate for a nominal distance. Made from a combination of sand, cement and water, usually in a sand/cement mix ratio of anywhere between 3:1 and 5:1. 4M X 5M 500G Clear Heavy Duty Polythene Plastic Building Dust Rubble Sheet DIY. Once applied via a roller the compound creates a barrier between the concrete and wood flooring. Don't know the repercussions of cutting into the. When we stick any floor down to the sub floor, solid or engineered, we insist on installing a liquid DPM unless the existing is guaranteed to be 100% in tact. 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. You run the risk of having a failed concrete floor and a failed floor-covering when you try to force nature 100% solids, high build coating. ★★★★★ ★★★★★ ( 3 ) Product code: 47327. 00. 2 Surface finish Screeds The surface of the screed should be finished according to the type of wearing surface or flooring that is to be laid. In a case where the floor is wholly below ground level, as is the case in a basement, all walls should be tanked. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most. Apply the first coat in one direction, ensuring that the material is worked well into the substrate. 24-month shelf life. I see the advice is: *Primer *Acrylic Self Levelling Compound *Liquid DPM *Self Levelling Compound of choice However, I can't seem to find any acrylic based self levelling compounds. 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. Bostik's damp proof membranes provide essential moisture mitigation and suppression for subfloors, helping to protect your installation for years to come. The problem is by the time we insulate, screed and lay the flooring we will be above the dpc& membrane level by 4 inches. Damp-Proof Floor Coating. Checking your Garage Floor for Damp. From the mid 1960s to the mid 1990s a typical concrete floor comprised a layer of hardcore, a polythene damp proof membrane laid on a thin bed of sand (to prevent puncturing), and a floor screed. Using a spirit level to check the level of a floor and measure thickness of screed required. Liquid screed. The concrete slab was usually 100 to 125mm thick. Never had damp floor in the 4 years of ownership. To be honest it’s worth having some sort of moisture suppressant put down just to make sure. coating to create a key for the screed. I would advise a single part flexi tile adhesive on top which will enable you to have stone, ceramic or porcelain tiles fixed. Damp Proofing Concrete Floors With Liquid Membranes. Screwfix Select. Can be used as a damp proof membrane and as part of a designed structural waterproofing system. You are. Technoseal Floor DPM. 00 € 60. The Marley tiles have now been completely removed. Reaction score. Two coats will provide protection up to a maximum hygrometer reading of 95% RH. wet coating. Holds back rising damp where a damp proof membrane is either missing or defective. The chap who will be installing the wood floor has tested the concrete and the moisture readings are high; upto 85%. I will then go about levelling the floor, adding in a liquid DPM, more levelling compound and vinyl tiles as the finish. Then lay a self leveller on top of this before tiling over that. 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. Answered 27th Feb 2012. 16. 00 € 60. Prevent moisture penetration with a damp proof membrane that can be painted under your solid wood, real wood and laminate floors. It is supplied ready to use. The black "rubbery stuff" could well be a layer of bitumen which was used as a form of DPM in houses from around (AFAIK) WWI period. Lancashire. Apply the first coat in one direction, ensuring that the material is worked well into the substrate. Hi, I had a kitchen extension built with a concrete floor approx 18 months ago. 30811761. Applications. Internal or external applied waterstops based on PVC, TPO or galvanised steel for construction and movement joints. No, can work well in very old brick buildings, but the pressure injection stuff relies going into a mortar course, it wont usually impregnate the stone (depending on the stone). Plenty of cement/latex/fibre. Call us on 302 244 0179 or submit an enquiry for contact information of contractors in your area. Prepare substrate. We have a concrete floor with 70mm insulation board over which the builder will be pouring 70-80mm screed. Vapour barriers. coating to create a key for the screed. Sussex. Whilst this is not ideal, it can be a low-cost solution, which is easier than restoring old tiles, or completely digging out and relaying a new floor. We are in the process of having an extension built. Liquid epoxy DPMs are ideal for concrete floors, such as garages, where the original damp proof membrane is missing or has broken down. water will be likely to collect between the DPM and the old floor. Temperature, air flow and type of mix, being just a few. Explore our 1200 Gauge DPM membranes. DIY Concrete Floor: Pouring Slab 3/3. A liquid DPM such as Bostik Cempolatex Moisture Suppressant must be applied in two coats. The coating cures to form a rubber-like elastomeric waterproof membrane and may be applied over many substrates, including asphalt, bitumen and concrete. Two coats will provide protection up to a maximum hygrometer reading of 95% RH. RonaScreed DPM is a liquid applied surface damp proof membrane designed to reduce the passage of water vapour and allow the adhesion of thin bonded and fast drying screeds to concrete which is either not fully dry or does not have a functioning DPM. Larsen DPM Universal is a superior 2 pack epoxy surface applied liquid damp proof membrane that enables laying of flooring even where moisture levels are at their highest up to 98% RH. 1. It is ideal for use on damp floors and walls. Visqueen High Performance Damp Proof Membrane. Fast curing – ready to tile or recieve smoothing compounds in 4 – 5 hours 2 Component, solvent free, One Coat DPM Suitable for use on surfaces with a moisture reading of up to 98% Relative Humidity (RH) Weight. Universal DPM allows immediate installation of moisture sensitive floor finishes onto damp concrete and screed. John Lewis are correct in being very very cautious re: damp, it is critical that the prep is spot on and damp levels sorted before any attempt is made to lay the Amtico. Walls appear to be dry & are mainly concrete block. It can also be lapped up walls to the DPC before the application of floor and wall coverings. Small hole dug through 2" soft sandy concrete to reveal hardcore and soil. The damp proof paint is now ready to be. Professional tips: how you should do it. Showing 1–15 of 21 results. Chimney damp proof course (labour and scaffolding not included) £75 per roll. This prevents moisture from the screed attacking the wood flooring and ultimately ruining it. Once applied, the product cures to form a membrane that is flexible and elastic. If you are getting 8 to 9% MC on concrete then you really need a DPM (or maybe the right meter, brick isn't concrete). I intend to follow the liquid DPM/self-levelling 'stickys' on the Flooring thread, but wondering what to do with the section of wall below the DPC. I don't want to puddle any DPM into these holes but does anyone know the best way I can 'fill' them before putting down the DPM. When applied on top of screed, it needs to have a further coating to protect it from damage such as laminate, tiles, vinyl, wood and carpets. This type of waterproofing membrane is applied directly to the surface of the concrete floor to protect it from water seeping through and getting the floor or walls wet. We have purchased a 4 bed detached house built in the 1950's. Flaking paint, peeling wallpaper and crumbling plaster are just a few of the many symptoms which can originate from rising damp in buildings. We are proud to have over 20 years experience of. How to do Damp Proof Membrane of your sub-floor. I am in the process of improving our kitchen. applying 2 coats of Drybase® Liquid DPM. Water under tiles. Description. A: A damp proof membrane (DPM) is a thick plastic sheet used as a waterproof barrier between a concrete subfloor and wood floor. Walls: Can be used under render or plaster as a water barrier or. DPM Membranes for Concrete Floors ; Damp Proof Course; Damp Proof Paint; Rising Damp Treatment; Water Repellents; Vapour Control Layers; Internal Waterproofing;. A DPM coating is your best option for existing floors that are experiencing dampness, as it doesn't require removing any concrete slabs. NO MORE DAMP EP40 Floor Primer is designed to soak into the substrate, block pores, improve adhesion and ensure an even, high quality finish. Still have moisture coming through (I think), and after further reading, 50mm of concrete is required to 'hold it down' and stop penetration. Rob_bv, Nov 11, 2020. Answered 22nd Aug 2016. We have purchased a 4 bed detached house built in the 1950's. Drybase Liquid-Applied Damp-Proof Membranes 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. The plan is to get an concrete sub-floor so that things will adhere to it properly then to go with Arditex NA, then the DPM, and then. Suitable for damp proofing concrete floors, foundations and masonry walls below, at or above ground level; Can also be used to protect retaining wall structures; Apply cold with a brushes for a cost effective and low labour application; For use on floors, 1st coat covers 1m²/litre and 2nd coat covers 1. Capital Valley Plastics Ltd Damp-Proof Membrane Black 1200ga 25m x 4m (47163) (55) compare. Last edited: Sep 2, 2010. It can also be used as an adhesive for the likes of wood block flooring and insulation boards, or as a plaster bonding agent – even on difficult surfaces. As mentioned above, for very new concrete a dpm primer, such as FS Epoxy DPM Primer, should be used. MS Polymer adhesive, for the DPM, please it depends on the concrete, best to contact a local flooring supplier *** Safer to apply the liquid DPM, particularly with solid wood as this has less tolerance for moisture. Category: Floor Treatment Tags: Damp Proof Membrane, Damp Proofing. A vapour barrier, on the other hand, is a damp proofing product attached to a wood floor underlay to reduce moisture passage. Damp proof membrane DPM – Designing Buildings. Generally speaking, when using a liquid DPM you apply your substrate by pouring it onto the floor area to be treated, and then trowel, paint, or roller it in. In order to make sure the. • Weatherproof protection for walls, above-ground structures and foundations. Is there a suitable, less messy alternative perhaps?DandDflooring. Id be tempted to run a dpm across the floor and up behind the skirting. DIYDave. Suitable for heavy wear areas, concrete floors where a DPM has failed or was never installed, or areas of damp concrete which cannot be surface dried prior to painting. It is supplied ready to use. We have had a full structural survey done which highlighted damp at the ground floor level. 1, your new concrete will need drying time, approx 1 month for every inch, then a DPM is required. The floor was vacuumed before applying Aredx DPM IC, an epoxy liquid Damp Proof Membrane (DPM). #3. e. These can over time allow a build up. Some parts of it are completely dry but other parts of it are still very tacky. #2. The floor DPM range manufactured by Capital Valley Plastics is designed for use with solid concrete floors. It seems like a self levelling floor compound is the best way to go. For a self-levelling screed a system such as Flowcrete UK’s Hydraseal would be used. Whoever did the repair once the fireplace was taken out didn't bother putting. UK Requirements for DPM Thickness. Liquid damp proof membrane For existing concrete floors, you can also apply a liquid damp proof membrane, which provides a retrospective damp proof membrane. In contrast, a vapour barrier (VB) is fitted on the warm side of walls or roofs to stop interstitial condensation. Add to basket. Use polyethylene sheeting to create a waterproof membrane to ensure that there is no leakage of the screed when it is pumped in wet. But too much water will extend the drying time and. OR. 3. Liquid DPM and waterproofing paint to waterproof and damp proof your property. £100 - £600. The product is applied in two coats. 1. 22 Feb 2007 #1. As a rule self levelling screeds need an active DPM at some point below them other wise they will likely de-bond due to damp and this could be the reason it seems to be lifting easily. The product is applied in two coats. After removing 6 of the tiles, I can see that this bituminous stuff is peeling away with some of the tile adhsive, and so Im guessing its gonna. Would that be ok or would it sink?. If I put a damp proof membrane down first, like a paintable one like Wickes paintable bitumen or Drybase Dpm in white, would products like this work under self levelling compound?A liquid DPM such as Bostik Cempolatex Moisture Suppressant must be applied in two coats. Magnesite must be completely removed. , Jan 22, 2021. 25 Feb 2006. I would. Drybase 2mm Plaster Membrane Mesh (2m x 20m) - Low-Profile. There is no damp proofing on the floor. The first answer is to paint the floor with SBR and neat cement in a 1:1 ratio then any cementitious will stick to that and it’s waterproof / condensation proof. Good afternoon. 3 - 12 % CM for magnesia flooring (proportion of organic parts). 00 Ex VAT. 3 - 12 % CM for magnesia flooring (proportion of organic parts). My ground floor is a partial basement formed of high density block work with the cavity filled with waterproof concrete to mid height and liquid DPM below ground level. Withstands 98% RH. F Ball DPM F77Liquid DPM on concrete floor. weberfloor DPM can be applied on substrates such as concrete and cement-based levelling compounds. Floor under carpet marked with chalk for wet areas. DPM Membranes for Concrete Floors ; Damp Proof Course; Damp Proof Paint;. You need a flooring professional to use an epoxy liquid DPM and screed suitable for this area and is not a job you should think to attempt 1 pinhole is a failed floor. Looking lay a liquid dpm in the cellar floor followed by a self levelling compound as it uneven. The DPM will be laid first, usually as a liquid product 'painted or trowelled' onto the concrete surface, then the screed laid over that. This can. The principle of tanking is to provide a continuous waterproof barrier or membrane; this is created using either mastic asphalt or proprietary adhesive DPM. #1 merit Well-Known Member If it’s solid wood you need a surface dpm. Quite likely there is no DPM underneath. Should take 3 days, tops - day 1 to empty the garage, scrub and clean the floor, and let dry (whack a fan heater in there to help). Anhydrite screed usually costs in the range of £15 – £20 per sqm, mastic. Free from water and free from solvents, this primer allows for a trouble-free installation as no swelling of the wood is to be feared. Flooring guy says as a last resort we could use a liquid DPM on top of the screed but he’s worried that will trap moisture between the new DPM and the one under the concrete and would rather dry out naturally. Drybase 2mm Plaster Membrane Mesh (2m x 20m) - Low-Profile Plaster Membrane For Use on Damp Walls. Most important thing here is to prime the bitumen and concrete repairs to get a good bond between tile adhesive and floors. ★★★★★ ★★★★★ ( 3 ) Product code: 47327. The dpm resin, is a sticky gooey 2 part epoxy based liquid to be precise. A water based product would have taken a month to. Location. The lower sand ratio means a higher ratio of cement, which gives a stronger mix. Can be used where a structural DPM is not present or is ineffective. Tiles came up very easily with zero bitumen attached. General waterproofing: - for use on concrete,Liquid-Applied Membrane. 15 m2 1. The concrete floor is in a finished bathroom and from what I can find out online the bitumen is a bit messy to apply. Hi. A liquid epoxy damp proof membrane (DPM) is a two-component epoxy resin membrane, specifically designed to be applied to damp floors to create a barrier between your floor. 7 days or sealed. Apply wall. It should be waterproof to prevent any rising damp getting through. If. #4. However the chance that the floor tiles or adhesive can release fibres and become respirable when disturbed is very low. Then SL, this will take care of the craters and uneven sections from remaining tile adhesive. Obviously if its a surface DPM you dont have a few inches of concrete to weigh it down. b) Physical DPM upstand, using DPC 300mm. Grinding the old bitumen from the concrete floor. It is also to prevent the liquid screed (to be. Old pre 1960's house with a concrete ground floor. 6. you need to dig up the old concrete then lay a couple inches of sharp sand. I would think a strip out and start again would be your best option, you should consider where/why there is water evident before. You can use Liquid Damp Proof Membrane with a glued down or floating floor. The floor is old concrete and dips ~25mm in the middle. Liquid DPM 5L. underneath a screed or self level we. #4. Add to Basket. 99 Inc Vat. Jord86 Screwfix Select. Sika primer MB or Sika-Bond Rapid DPM) or, in the case of a floating floor, a properly installed heavy-duty, non-permeable plasticThis should be a 6 foot (1800mm) level to get a proper level because it is such a big area. Step 3: Lay the watertight membrane.