Basement tanking, also known as cellar tanking, is the process of applying a liquid waterproof coating to a basement’s walls, floor, and, in some cases, roof. Recent. The UK's leading property care experts with 70+ years experience. 1. 29 ex. However, this varies considerably depending on the contractor and other factors. Basement waterproofing and below-grade tanking involve using various waterproofing methods and products to ensure a watertight seal. 2. -. Membrane, slurry and paint for tanking basement walls and cellar. The cost of tanking your underground space will be determined by: How large the space is; The extent of damage to underground walls; The method of waterproofing or. The addition of the Drybase Elasticiser polymer to Drybase Tanking Slurry imparts the mixture with elasticity and enhanced crack-bridging properties. Both approaches are covered by British Standards. The final price may depend on the site specifics (what are you waterproofing, the condition of your property, etc. Cellar And Basement Tanking Costs 2023 Money Saving Guide. Remmers MB 2K Plus - Flexible Tanking Slurry 25kg Rating: 100%. Bostik Tanking Slurry is a breathable, waterproof coating for sound internal brickwork, concrete and stone. For Balcony & Basement. Some of the products are available to purchase online with Free Delivery from the Damp Store. Basement waterproofing is more of a generic term and is used to describe the three main ways of keeping water from a basement or cellar. Step Three - Waterproofing. We have sold over a million kilos without a failure. . However, these two techniques are quite different processes. Specialist tanking company; basement waterproofing, low level tanking to walls and wet tanking slurry mix. It has been tested, assessed and approved by the British Board of Agrément as able to resist moisture ingress and sulphates for the lifetime of the structures it is applied to, making it appropriate for: Basement. Trade prices with expert advice. Careful consideration should be given to the waterproofing design and it should adhere to the recommendations set out by the BS8102:2009. Basement waterproofing, from basic damp proofing to total encapsulation, costs homeowners between $3 and $10 per square foot,* averaging $3,250 for a 500 square foot basement. Apply two coatings of tanking slurry (3 to 4 hours between coatings). Basement tanking systems as well as cellar tanking systems are slurry or liquid applied coatings that form a tank around a complete structure or part of a structure that is either basement or cellar. This 2-coat system is suitable for use above and below ground level. It’s a cheaper option, and can cost as little as £40 per square metre. . Fast UK delivery. A tanking slurry mix should also make your basement ready for long-term use. Damp Proofing. It creates a durable and waterproof barrier that prevents water penetration. ft. It can be applied by trowel or spray. Then this might be a good enough solution. 1. Typical spaces that would use Type A Waterproofing include: New build basements; Basement renovations; Cellar refurbishments; Storage or utility rooms; Underground car parksVandex products can also be used to waterproof ponds constructed from brick or concrete blocks. Waterproofing and Tanking. Had to lower floor about 800 mm, underpin walls and all. In addition, where such barriers are applied to the internal face of a structure, water in the ground externally moving through that structure (from the outside in) will essentially bear upon the tanking at the internal face, applying a pressure which. Dot and Dab all walls using moisture resistant plasterboards and finally skim all walls. - an overview video showing how to tank a cellar using tanking slurry. A tanking slurry is used for waterproofing walls in an underground cellar or basement. This damp Proof tanking slurry has been trusted by structural waterproofing professionals for over 20 years. Home. This damp Proof tanking slurry has been trusted by structural waterproofing professionals for over 20 years. Call Peter Cox on 0800 633 5712 * or Contact Us. Use our free HOMEWYSE CALCULATOR to get fair costs for your SPECIFIC project. Plastivo 180 Basement Tanking Slurry. It is very good at stopping penetrating damp and very affordable. It is also relatively inexpensive and dries quickly. 40 Inc VAT. By waterproofing the walls you may push the water elsewhere and it could reappear through a defective floor. This 2-coat system is suitable for use above and below ground level. The high coverage-per-kilogram of Drybase Crystalline. Starting at one side of the room, unroll the membrane and cut to fit the room as one would a carpet. Mobile: +353 87 243 2564. With this amount, you can expect to cover around 12m squared. Cellar and Basement tanking is a great way to waterproof your basement, If you ever decide to go through with a cellar conversion (or basement conversion). Each Type’s application is influenced by ground conditions and. How to Waterproof Basement or Cellar Using Tanking 1. Vandex BB75 / BB White / BB75 Z. S. Ideal for internal and external use as a waterproof render, it is suitable for use on walls prior to plastering and on floors prior to self-levelling. Available at low trade prices direct from Permagard. While basement waterproofing costs between $5 and $10 per square foot, damp proofing basements comes in at $3 to $6 per square foot on average. If you are interested in tanking a cellar, or want to discuss any waterproofing options for your property, call the expert team at Peter Cox today on 0800 633 5712 or contact us using our online form. Tanking is also known as “Type A waterproofing system”. SIKA. This is why we have prepared this helpful how-to guide to provide all the information you need to get started tanking a cellar to ensure it stays waterproof and ready to be used as a dry, functional space. The slurry forms a watertight barrier by blocking masonry pores. CHAS accreditation demonstrates excellent health & safety standards. Basement. The tanking slurry, in the case of HydraDRY, should be applied with a stiff brush or even a broom (should be washed frequently to avoid clogging) at a thickness of 1. Flush out the chase and remove any debris. 1. Stormdry Masonry Protection Cream - 1L. PermaSEAL Crystalline Cementitious Tanking Grey 20kg Bucket. Damp is prevented from seeping through walls using a method called tanking. How to Pick the Best Tanking Slurry. However, most homeowners pay around $5,000 to waterproof their. If you are interested in getting the best from your basement or cellar, give our team a call on 0800 0121 437 or fill in the. Newton System 800 is the top basement waterproofing solution used by professional waterproofing contractors in Britain. It has been tested, assessed and approved by the British Board of Agrément as able to resist moisture ingress and sulphates for the lifetime of the structures it is applied to, making it appropriate for: Basement. Smooth surface: 2kg to 2. We will be able to arrange for one of our surveyors to attend your property to supply an initial report and a competitive quote. Cellar waterproofing. Qty. 50 Ex VAT. The powder mixes with water to form a slurry-like paste. Not be damaged by moisture from the ground and not carry moisture from the ground to any partThe main job of tanking slurry is to stop damp and moisture from penetrating walls and floors. Tanking Slurry is a cement based waterproofing material that protects against water ingress and dampness. CHAS accreditation demonstrates excellent health & safety standards. This is the cost for applying waterproofing per square metre. Apply a coat of PermaSEAL Tanking Slurry to the area 100mm up the wall and 100mm across the floor covering the joint. It resists positive and negative water pressure and is water vapour permeable. Basement Tanking Mesh Membrane Kit – Single Pump Fully Auto (4m x 5m) £ 1,099. g. Finally, apply a fillet seal over the slurry and fill the chase from wall to floor. Size . The waterproofing system most associated with Type A waterproofing is tanking – the application of tanking slurry to the walls of a structure to prevent water ingress. Then on the clean, efflorescence free concrete surface, apply the membrane waterproofing to your swimming pool. Cellar waterproofing. £26. 0208 950 9070. Cost Range. £160. Cellar, basement and waterproof concrete wall tanking products for basement waterproofing. The main coating material, Drybase Tanking Slurry, is a cement-based powder which is mixed with water and applied to walls, floors, and ceilings by spray or trowel. Designed to function against water penetration in various conditions, it can be used in foundation slabs, tunnels,. Once applied it forms a waterproof barrier, this will completely stop water from penetrating through the walls and floor of your basement. Just after the application of cement slurry on the surface,Vandex Cemelast is a cemetitious two-component, polymer-modified – and efflorescence-free surface waterproofer with hydrophobic properties. After a week or two all of the walls were completely dry. Our guide below will outline the different types of tanking and methods to waterproof your walls before going on to describe how to tank a wall using tanking slurry or membrane. Our price £ 34. Jord86 , Jan 24, 2017This is to expose the affected basement wall/s. For the actual waterproofing layer, they market Köster NB 1, a waterproofing slurry with crystallizing and capillary sealing agents. The tanking slurry is applied directly to the walls and floors and then cured. Sika Damp-proofing Slurry is a ready to use just add water, water proofing brushable or trowelable membrane. 00. What you'll get from this page: Top-Rated – The Best Tanking Slurry: #1: Sika Damp-Proofing Slurry. Wykamol tanking slurry for BS 8102 Type-A basement waterproofing. Long-term cost savings: Investing in basement tanking upfront can save homeowners money in the long run. Prepare the slurry – Follow the manufacturer’s instructions and mix enough powder and water to last 30 to 40 minutes, being sure to wear a face mask and goggles to protect your eyes and skin. Ideal for internal and external use as a waterproof render, it is suitable for use on walls prior to plastering and on floors prior to self-levelling. 1. Alternatively, you can book a basement survey online by completing your details below. Xypex Concentrate is also mixed in Dry-Pac form for sealing strips at construction joints, or for the repairing of cracks, faulty. The UK's leading property care experts with 70+ years experience. £32. 1) Clear the working area. Tanking involves the internal or external application of a waterproof material directly onto the walls, floor and sometimes the ceiling of an underground space. Concrete water-retaining structures such as water tanks and reservoirs. However, tanking isn’t always the right solution. Tanking slurry is a cementitious compound made from Portland cement, aggregates, quartz sand, and various chemicals. The process usually takes around 1 to 2 days. Tanking is also known as “Type A waterproofing system”. Basement Tanking Property Conservation Experts Book A Survey. The UK's leading property care experts with 70+ years experience. This material will create a barrier to prevent moisture from getting into the basement, cellar or any room that requires damp proofing solutions to solve damp problems and other issues related to water getting into your property. The slurry is a cement based waterproof coating, that can be applied to surfaces. Jersey. You may have to apply two coats (follow manufacturers instructions). Tanking walls in a basement or cellar refers to methods used to keep walls dry and free from problems like leaks, mould or penetrating damp. KA Tanking Slurry is the complete crystalline solution to waterproofing masonry and blockwork. Antel Tanking Slurry - Suitable for Basement Tanking. CHAS accreditation demonstrates excellent health & safety standards. Option 2 – Tanking Membrane, Coating, or Slurry to hold back the groundwater from entering the building. Remove concrete form ties. Check Price 32% OFF. Reviews (2) Koster Repair Mortar Plus – 25kg (Up to 10 Linear Metres of Waterproof Fillets) For your waterproofing projects, Koster Repair Mortar Plus is a watertight, rapid setting, expanding repair mortar with unparalleled adhesion performance. The UK's leading property care experts with 70+ years experience. The function of the impermeable barrier is to prevent water penetrations. We offer a wide range of Self Adhesive Tanking Membrane, Basement Tanking Kits, Wall Membranes, Floor Membranes, Aqua Channels, Butyl Fleece Tape. In simple word cellar tanking systems and basement tanking systems are one and the same thing. Pack Size 25kg Coverage ( Up to 8M2 @ 2 Coats) Koster Polysil NB1 Grey – a migratory crystalline tanking slurry used to seal below ground structures against water ingress. It provides excellent pressure and abrasion resistance as well as excellent resistance to a wide range of chemicals. Once applied the tanking is able to withstand external water pressure and maintain a dry environment by creating a physical barrier to water entering the basement area through the walls. Call London Damp Specialists on 020 7458 4864. 14. Vandex BB75 is a tanking slurry (also known as a waterproofing slurry) for basement and cellar waterproofing applications. Some people say I should drill it anyway and plug the hole with silicon. Cellar waterproofing. Open Mon-Thurs till 6pm and Fridays till 5pm. S. It is applied in a two-layer application method and costs $200-250 dollars to cover 20 feet. Simple, cost effective and easy to use for applying waterproofing and tanking systems to basement walls and floors. CHAS accreditation demonstrates excellent health & safety standards. Platinum Chemicals supply a wide range of Structural Waterproofing Products suitable for use in below ground structures such as basements, cellars etc. Aquatech Premium Tanking Slurry. Figure 1: External Tanking System. This can be applied once the slurry has completely dried after 24 to 48 hours. When mixed with water, the slurry forms a durable waterproof layer that's quick and easy to apply. Drybase Tanking Slurry is a high-quality tanking slurry with superior performance. 20 kg bag. Newton System 800 is the top basement waterproofing solution used by professional waterproofing contractors in Britain. Waterproofing and Tanking. 95 ex. Trusted by structural waterproofing professionals for over 20 years, Aquatech Tanking Membrane is often used for basement renovation. We will be able to arrange for one of our surveyors to attend your property to supply an initial report and a competitive quote. 4 states that where grade 3 protection is required where “below ground wall retains more than 600mm, measured from the lowest finished floor level, the waterproofing design should include a combination of two of the. Waterproof tanking creates a watertight barrier that blocks dampness and moisture. 25 per square foot in June 2023, but can vary significantly with site conditions and options. 25kg of KA Tanking Slurry will provide 2 coats, each at 8m². Waterproof Tanking Membranes. For a garage, KA tanking slurry, then treated battens screwed to wall with silicone squeezed into the holes before plug and screw goes in, then insulation, then foilback plasterboard. Bostik Tanking Slurry can be used for basement walls (andThe Newton HydroCoat System is an internal Type A waterproofing solution for projects that requires an internally applied membrane to resist water ingress. Tanking a basement is the method of damp proofing in basements. The chief disadvantage is that cementitious products have no give to them probably because cement just doesn't stretch to any degree worth mentioning. £280-£370. Drybase® EL2 is a liquid polymer additive for Drybase® Tanking Slurry intended for smaller waterproofing projects. Nuraply 3PT/3PTM. Call Peter Cox on 0800 633 5712 * or Contact Us. BS EN 1504-2. Wykamol tanking slurry for BS 8102 Type-A basement waterproofing. Basement Tanking is the application of a membrane or coating to the inside or the outside of the structure. However, remember that lowering the floor level to increase headroom costs around £200-300/m². If the moisture passes through the wall salts can damage any walls that have no form of protection applied. S. When mixed correctly, this water-resistant slurry is suitable for both indoor. The purpose of basement tanking is to prevent water ingress and moisture penetration, which can lead to various issues such as dampness, mold growth. Email: [email protected] Tanking Cavity Membrane Waterproofing System 80m². You could pay as little as $300 if your tank is above-ground and as much as $3,500 if it’s belowground. View all: Sika Waterproof Sealants. If you have any questions about KÖSTER tanking products or need help choosing the best tanking slurry for your requirements then contact us today on 0203 947 2972. Bathroom waterproofing can cost as little as $40 per square metre, but that is the low end of the scale. 5L. Kingfisher Aquatech Tanking Membrane is the ultimate brush applied tanking solution. It involves waterproofing walls with a tanking slurry or membrane sheets, depending on what works for you. Call 01355 222 777. This is a can be a perfectly acceptable method of waterproofing. Tanking should be provided wherever a floor level is below ground level. UK Delivery. For Interior & Exterior Use. 25kg of KA Tanking Slurry will cover 2 coats at approximately 8sqm each. Size: 20 kilo bucket. CHAS accreditation demonstrates excellent health & safety standards. Browse our full range of Waterproof Membranes and Tanking Slurry Products. Free delivery on eligible orders of £20 or more. Internal concrete surfaces of walls and rafts or slabs to. The membrane is typically installed on the internal surface of the basement, ensuring that any water attempting to enter is channeled into a drainage system. £ 82. Sika Waterproof Coating Grey 5kg. SOVEREIGN K11 tanking slurry waterproofing on below ground reinforced concrete retaining walls and slab. Packaging: Loose powder in bucket. Best practice waterproofing method is meticulous preparation – a detailed clean & dry wall. Skip to content Perfecting Coatings for the Building & Leisure Industries | Free Technical Advice - Tel: 023 9285 6110. We're installing a combination of tanking and cavity drainage membrane systems to waterproof the basement of Build It's Self Build Education House by Chris Batesmith 25th February 2019Tiny defect but water still penetrates this slurry system. How Much Does Tanking Cost In 2022 Checkatrade. VAT. $6 – $15 per square foot total $250 – $800 per crack for epoxy injection only $4,500 – $10,000 total interior waterproofing (750 – 1,000 SF) $10,000 – $15,000 total exterior waterproofing (750 – 1,000 SF) Get free estimates for your project or view our cost guide below: Get new customers How much will your project cost? Get free estimates The basic cost to Waterproof a Basement is $11. The use of Koster Poylsil TG500 is recommended for to all new concrete basement slabs and retaining walls before the installation of a cavity drainage membrane. If the waterproofing is done in more than one bathroom or as part of a complete bathroom renovation, the cost may be lower. Semi-Positive Displacement (SPD). When water proofing a tank below the. This damp Proof tanking slurry has been trusted by structural waterproofing professionals for over 20 years. 5 litres of water per 20kg bucket. Types of Waterproofing: 1. If you are going to leave the tanking exposed for a while before applying a finish or plaster to the brickwork, you should apply an extra splatter coat to. gl/pV1OK ) to secant piled basement wall. Waterproofing and Tanking. Spread the tanking slurry out using a soft broom to the desired thickness. Tanking slurry is a great example of a non-breathable waterproofing system, that is extremely popular. Can be used internally and externally on concrete, brickwork, blockwork or masonry. Key Takeaways: Basement waterproofing and below grade wall waterproofing are essential to prevent water seepage and moisture intrusion. These systems manage water entering the property and safely remove it. Next dampen the wall again and apply a coat of tanking slurry or solution to the walls surface. VAT. e. London. starstarstarstarstar. Vandex BB75 can be applied to concrete and masonry. Another great way to waterproof your basement is to use a product which when mixed creates a slurry. 5mm per coat. Use our free HOMEWYSE. Contact our team today! QUOTE REQUEST. 4. 5 to 8m² per 20 kg unit/ coat. Get tanking. Bostik Tanking Slurry is a breathable, waterproof coating for sound internal brickwork, concrete and stone. Available in Grey colour only. This was standard practice for the builders, and nothing to the contrary was shown on the engineer’s drawings. Bostik Tanking Slurry can be used for basement walls (and lightly trafficked floors. #5: Everbuild Aquaseal Tanking Kit. However, it’s generally less effective than exterior waterproofing, which typically costs $3,000–$15,000. Wykamol tanking slurry for BS 8102 Type-A basement waterproofing. Permagard is a leading manufacturer and supplier of basement waterproofing products, damp proofing membranes, and structural repair products. KA Tanking Slurry provides a permanent solution to lateral water ingress in earth retaining walls, basements, cellars and below ground structures. It is durable, capable of withstanding heat and frost for all-weather and environment coverage. Option 2 – Tanking Membrane, Coating, or Slurry to hold back the groundwater from entering the building. Kingfisher “Aquatech” is the ultimate brush applied tanking system for basements, earth retaining walls, underground garages, water tanks and more. This creates a waterproof seal that prevents water from getting into your basement. Basement. PermaSEAL Fillet Seal 20kg. Open Mon-Thurs till 6pm and Fridays till 5pm. To arrange for a quotation for basement tanking London or any of our waterproofing services, get in touch with the expert team here at Kenwood. All the kit you need to start waterproofing your basement! Construction Chemicals Tanking Slurry is THE industry-leading product for dealing with below-ground damp and moisture. RRP £ 40. Construction Chemicals offer the most durable & reliable basement & cellar conversion products in the UK. The UK's leading property care experts with 70+ years experience. Here at Permagard, we’ve written a number of guides on tanking, from ultimate guides to applying internal and external tanking:. Liquid coating systems come in 5-40 year guarantees and depending on the current walls in place (i. Add to Basket. For a standard cellar or basement, tanking costs an average of £60-70m² can be applied and the areas above will have to be taken into account. Drybase Tanking Slurry 25 KG -. 97 KB WRAS No More Damp Tanking Slurry 2016 PDF, 68. Another time slurry could be a good option, is when you are tanking a basement. Damp proof course – Terraced house. 25kg. The difference between tanking waterproofing newton and your home basement cementitious brooks brothers coventry midlands cellar tec a 3 solutions you should know about paints treatments arcon supplies cavity drain system london southern liquid systems how much does it cost to waterproof building waterproofer uk when is. BS EN 1504-2. Fast UK delivery. Waterproofing and Tanking. Save on heating costs:. Tanking Slurry Kit 10 x 25kg. Damp course – Detached house. The tanking formula is a cement-quartz-acrylic polymer blend supplied in powdered form. Does tanking require building regulations newton waterproofing basement renovation kingfisher s and bs 8102 how to achieve compliance with the labc type c drained system existing basements much it cost waterproof a waterproofer uk barrier cavity drain construction details three types of halls dampcoursing what is internal Does Tanking. A tanking slurry mix should also make your basement ready for long-term use. 50 Ex VAT. Add to Basket. 0208 950 9070. Well, it depends on the size, shape of your basement, and the amount of work that needs to be done. The first coat must be almost forced onto the surface to ensure a good bond with the wall. Basement tanking will involve applying slurry to coat the walls of the basement, to prevent moisture from entering. 60 per L. If you have any questions in relation to external waterproofing or basement waterproofing in general get in touch. Waterproofing and Tanking. Dec 08, 2014 · an alternative form of tanking involves the creation of a new "cavity wall" whereby a false wall is created inside the basement using waterproof board. The tanking slurry forms an impermeable waterproof barrier that prevents water ingress and damp when it cures. 131K views 6 years ago. KÖSTER Grey Tanking Slurry for tanking basement and cellar walls. Get our expert help & watch our videos. Call Peter Cox on 0800 633 5712 * or Contact Us. Tanking is primarily used to tackle water ingress, and basement tanking is particularly good at resisting hydrostatic pressure i. Tanking slurry can be a good way to stop rising damp. Call Peter Cox on 0800 633 5712 * or Contact Us. By the time you get 3 metres down to basement floor level you will possibly be into the ground water table ( at least in the winter) . The interior basement is easier to access, so waterproofing costs slightly less, usually between $500 and $10,000 for a 1,000-square-foot space. Floor to wall Joint Seal – cut out the gap to at least 25mm x 25mm and fill with a waterproof mortar. Applying Flexible Tanking Slurry. ie. It can be applied by either brush or trowel and works by creating insoluble crystals into the water bearing capillaries & fissures which blocks the further ingress of. Dilution: The liquid demand is 6. As a result, you can use it in a range of jobs. Colour . Waterproofing and Tanking. 5kg/m²/coat 8 to 10m² per 20 kg unit/ coat. Make sure you use the right amount of water as mistakes can make it ineffective. 1 * 60mm Mixing Paddle. The average oil tank removal cost is $1,290, with a typical range of between $578 and $2,038. ®‘s range of waterproofing products and systems include specialised bituminous sheets, liquids, putties, cementitious based products and silanes. Cementitious waterproofing: Cemented waterproofing is the simplest method of waterproofing, materials required are freely available, easy to mix and apply. Underpinning of walls also have to be considered. More Info-+ Add to Basket. For more information on Tanking and Sump Pump Systems or on an effective Waterproof Treatment, please Contact Us today! Phone: +353 42 974 1495. External tanking is the process of sealing the outside of a building or substructure in order to protect it from water ingress, flooding and other water damage. 4, shall be applied only on the area of the concrete surface, that can be covered with the cement mortar (1:3) base course within half an hour. #5: Everbuild Aquaseal. 99Inc Vat. NHBC in chapter 5. 40 Ex VAT. High Performance Waterproof Tanking Slurry. Cost to waterproof a basement how much does tanking in 2023 is garratt cellar and costs making dry. 40 Inc VAT. Call us on 01329 235252 for any technical advice or for quotes on large scale projects. External tanking is usually carried out using “type A” waterproofing systems, a term defined under BS 8102:2022 as products that are fully bonded to the structure such as self. No. You'll finish the job more quickly. If you have a 5x6 metre basement, the cost is around £10,500. Thoroughly wet the entire surface before applying the first coat of MAXSEAL FLEX – a flexible cement-based waterproofing mortar. > Waterproofing and Tanking. 32. The average cost to waterproof a basement is $1,920 to $6,320, or between $3 and $9 per square foot for materials and labor. Tanking Slurry Kit 15 x 25kg. Waterproofing and Tanking. Cellar waterproofing. Open Mon-Thurs till 6pm and Fridays till 5pm. It involves coating the walls and floor with a waterproof cement or slurry, creating a barrier that prevents water ingress. Aquatech Premium Tanking Slurry. As basements are located below ground, they’re highly likely to suffer from damp. 4. Waterproofing a Dig-out Basement Figure 1: Basement with dual-layer internal waterproofing; tanking slurry and membrane. Apply the Tanking Slurry. e. It is made by mixing Vandex BB75 (dry component) with Vandex Cemelast Liquid. Our Basement Tanking System uses a water proofing membrane, that leaves an impermeable waterproof surface, enabling dry-wall lining on studs & direct laying of floors and is ideal for water proofing wall & floor surfaces below. 00 Inc VAT. OUR PRICEThe waterproofing barrier should run continuously around the whole structure. Some say I should avoid battening the walls as it would require drilling through my new tanking. ; Tanking walls can be accomplished through either cementitious tanking slurry or waterproof tanking membrane. Drybase Tanking Range. A tanking slurry is used for waterproofing walls in an underground cellar or basement. More complicated basement sealing jobs such as adding drains & gutters can cost over £6,500. The UK's leading property care experts with 70+ years experience. £225. It is 'Type A Tanked Protection' as defined by BS8102 Protection of below ground structures against water ingress. The first coat must be almost forced onto the surface to ensure a good bond with the wall.