architects guide to blindside waterproofing Weblimitations and disadvantages. This method of bentonite waterproofing is pretty straightforward, although it has some downsides. Advantages of Exterior Waterproofing Membrane Over Sodium Bentonite Installing an exterior waterproofing membrane onto the area where the water was seeping into your basement has a wide variety of advantages over the Sodium Bentonite option. The good news is, bentonite is non-toxic, neither is it allergenic. By visiting this website, certain cookies have already been set, which you may delete and block. The polymer is integrated with the asphalt to create a more viscous and less temperature-sensitive elastic material compared to asphalt on its own. Penetrating crystalline systems must pass the rigorous USACE CRD C48-73 waterproofing test. The chief disadvantage is that cementitious products have no give to them probably because cement just doesnt stretch to any degree worth mentioning. As a matter of fact, bentonite can absorb 7 to 10 times its own weight in water. BELOW GRADE BLINDSIDE WATERPROOFING FOR We and our partners use cookies to Store and/or access information on a device. These products typically come in liquid form, and include oils, hydrocarbons, stearates or other long-chain fatty acid derivatives. Bentonite waterproofing systems have been on the United States market for nearly 80 years. An example of data being processed may be a unique identifier stored in a cookie. Most applications simply require nailing of the sheet or panel to the substrate. The more it expands, the denser it becomes. Despite these advantages, there are drawbacks. This course will build upon basic cover board education and teach you how to identify and articulate the most common risk factors (adverse conditions) for commercial roof damage. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. The material was sprayed or troweled onto the substrate, which sometimes led to inconsistent application thickness. An example of data being processed may be a unique identifier stored in a cookie. As you can see, bentonite is quite cheap. Electron microscope image of Xypex crystals. CLAY-TITE is a dual layer waterproofing consisting of virgin HDPE (20 mil), sodium bentonite, and a protective layer consisting of a non-woven polypropylene. The best placement for Superstop is 2 (50mm) inboard from the exterior side of the wall assembly and immediately prior to the rebar caging. This won't delete the articles you've saved, just the list. Waterproofing of concrete is an integral part of the construction, it is a solution to reduce permeability, shrinkage, chemical resistance, etc. The polyurethane protective coating has a restricted pot life, the impermeable floor coating permits water to form below the floor coating. Because sodium base bentonite is a natural inorganic material, aging or corrosion will not occur even after a long period or when the surrounding environment changes, ensuring the waterproof performances longevity. Is CLAY-TITE compatible with stone foundations? This polyurethane liquid membrane is used for flat roofs, which is exposed to weathering and has high ductility.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'constructionor_com-large-leaderboard-2','ezslot_11',112,'0','0'])};__ez_fad_position('div-gpt-ad-constructionor_com-large-leaderboard-2-0'); Polyurethane is very sensitive to a moisture content that should be used in evaluating moisture before application, otherwise, membrane peeling or de-bonding may occur after some time. Thermosetting membranes (i.e. Bentonite waterproofing makes use of a form of clay known called bentonite. This feature has been temporarily disabled during the beta site preview. Cementitious waterproofing applications: Water treatment plants Sewage treatment Solvent-Based Curing and Sealing Compounds. How much bentonite youll use depends on soil characteristics. Remember, bentonite wont completely waterproof the cracks in the parts where the basement floor and walls meet. Bentonite is usually applied in sheets. Thermoplastic materials soften when heated and harden when cooled, so sheets can be attached with solvent-based adhesives or by heat-welding at the seams a significant advantage over field-fabricated seams. As we have already mentioned, bentonite can be used to seal cracks and gaps in building foundations to protect the basement from moisture. STORAGE AND HANDLING :(0?1cew. Only then can one of the three different methods of bentonite waterproofing be applied. This waterproofing method has been employed for more than 75 years, but its popularity has recently increased. When heated, traditional bitumen both coal tar pitch and asphalt releases volatile organic compounds (VOCs) and potentially carcinogenic fumes. WebThe bentonite can expand up to 8 times its original thickness to stop water that may make it past the HDPE layer, providing a second layer of protection. Bentonite waterproofing involves the use of sodium bentonite, a naturally occurring clay mineral, to create a barrier against water intrusion in construction structures. As a result, it can swell up to 15 times its dry volume. Concrete waterproofed with crystalline admixtures affords other benefits, too. It helps in reducing the humidity inside the house, thus prevents damage to our indoors from exposure to moisture or water.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'constructionor_com-medrectangle-3','ezslot_6',108,'0','0'])};__ez_fad_position('div-gpt-ad-constructionor_com-medrectangle-3-0'); In terms of the foundation, waterproofings means that no liquid will penetrate in the concrete foundation wall even under submerged conditions, the several products applied to foundations are called damp proofing. Although liquid-applied membranes work well on projects with multiple plane transitions, intricate geometric shapes and protrusions, they are typically only used when prefabricated sheets do not work. Installing a sump pump can do the trick. There are at least five types of injection materials: Perhaps most famously, Kosters injection system was used on two different below-grade walls in the Empire State Building, one a 36-wythe brick wall (see Image #7) and the other concrete block (see Image #8). Manufacturer claims and homeowner anecdotes of successful interior waterproof solutions for basement walls and slabs did not completely add up. It is easy to apply using a trowel or putty CLAY-TITE MASTIC (Canada) CLAY-TITE MASTIC is a polymer-modified bentonite paste used in pipe penetrations, inside corners, concrete voids, and tieback Bentonite Waterproofing Another method to apply it is to inject liquid bentonite mud around the foundation. Substrate. Waterproofing The PVC deteriorates if it is in contact with hydrocarbons. I had requested W. R. MEADOWS in the project specificationsand they were able to meet our needs with CLAY-TITE., John Ritchie Basement waterproofing by no means is an exciting topic to write about, but you did an excellent job keeping it entertaining and not boring. Bentonite systems cannot be installed during rainfall while groundwater level is fluctuating, or in areas with constant wetting and drying cycles because the clay will deteriorate. Waterproofing Web Reading time: 1 minute Concrete waterproofing is the application of impervious material layer on concrete which prevents water from penetrating and making the structure waterproof so that it remains relatively unaffected by water. How much bentonite you use for sealing your pond depends on the surface on your pond. endstream endobj 62 0 obj <> endobj 63 0 obj <> endobj 64 0 obj <>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/XObject<>>>/Rotate 0/Thumb 40 0 R/Type/Page>> endobj 65 0 obj <>stream Protect your home with our proven solutions & lifetime warranty. Performance depends on surface adhesion and proper seam lapping. If installed in the horizontal direction, ensure that seams are shingled in a manner to shed water. The primary form of application is with prefabricated panels or sheets. The liquid is cured in a rubber coating on the wall and surface elongation properties can reach 280%, the durability of a waterproofing coating depends on the type of manufacturer. Bentonite Waterproofing It was a dungeon! The good news is, most homeowners dont have to fret about water entering their basement through the above-mentioned areas. With an existing house, the foundation must be excavated in order to apply bentonite sheets. Many contractors have even begun issuing warranties for your basement wall after repair with bentonite. This image from a Tremco Technical Bulletin shows how challenging it can be for negative-side waterproofing to prevent below-grade water leaks. Concrete is porous and, if not waterproofed, absorbs water that can cause cracks, waterborne contaminants and chemicals that can cause deterioration. The polypropylene fabric protects the bentonite from direct installation of shotcrete. endstream endobj startxref It is a primary ingredient in cat litter and in some pore-cleansing cosmetic products. Get building science and energy efficiency advice, plus special offers, in your inbox. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. If youre wondering how much it would cost to waterproof your basement using bentonite in 2021, then wonder no more. In this article, well be telling you all you need to know about bentonite injection waterproofing, and why it is an ideal choice for protecting your basement against moisture. If you bury your waterproofing treatment behind finished floor and walls such that they cannot be inspected for new cracks, there is no guarantee that your waterproofing system will stand the test of time. The complete source for building, designing, and remodeling green homes. Prevents the formation of cracks on the concrete floor. An experienced trainer and consultant, hes been recognized as NAHB Educator of the Year. For example, concrete treated with crystalline admixtures aresuitable for complex architectural designs. Water-soluble sulphates can degrade concrete. How to keep water out of basements and crawlspaces, The difference between hydrostatic pressure and wicking. All openings >1 (25.4 mm) must be detailed using plywood, grout, or alternate method to provide a sound substrate. But I did not think that I understood the topic or the physics well enough to challenge the claims or explain my skepticism. A primary reason for their longevity has been technological advances that have made them economical and easy to apply. Hydration must occur immediately after installation and backfilling. Application over concrete substrates requires a smooth surface with no deformations or shark fins. CLAY-TITE ADHESIVE is to be used when above the water table and temperatures are above 40 F (4 C). Bentonite Waterproofing The average bentonite price is typically $85 per ton. This reduces the maintenance coast of the building. Your Home Has Water Damage. This blog provides authentic information regarding civil structures, equipment, materials, tests & much more. I am just back from Building Science Corp's Summer Symposium, where I met Skylar Swinford, who used to work for Hammer and Hand, and created the content on their details and approach to best-practice basement moisture management. Keep CLAY-TITE dry; protect from exposure to the elements. As Peter's article points out, working from the interior isn't the best choice, but it can often be the only viable one. Privacy and Cookies Policy These membranes are composed of polyvinyl chloride (PVC), chlorinated polyurethane or chlorosulfonated polyethylene, with glass fibre-reinforced PVC being the most popular membrane type. %%EOF Areas that require flexibility and face recurring movement would be better waterproofed another way. * What is a Free Estimate and Inspection? If you want to protect your concrete and ensure it has a long, serviceable life, waterproofing is essential. 3 homemade waterproofing solutions that really work. Kevin Yuers is Vice-President of The Kryton Group of Companies and is responsible for Product Development, Technical Services and Operations. If you apply a thin coat of bentonite, water will eventually enter you basement. Terms of Use, USA Canada Franais Espaol International. Overlap and stagger seams at least 4 (101.6 mm). Polyurethane liquid membrane is an expensive method, in which flexible membrane applied carefully to avoid cracking after some time used for areas with exposed roof and weathering. In order to provide maximum protection, the entire foundation wall must be exposed in this manner. Cementation waterproofing is the inability to maintain the cracks, which causes further leakage. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. There is an approach you can take for primary waterproofing from the interior of existing basements or other below-grade structures: chemical injection or curtain wall injection. A low perm coating/covering can make things worse. Additionally, sheet membranes must be applied to a smooth finish without voids, honeycombs or protrusions.