The flexibility depends on the dependable content of the polymer added to the bitumen. %PDF-1.7 % It is currently offered in four forms: 4. Let us take a look at some of them below. As a matter of fact, bentonite is a commonly used ingredient in skin care products. Lap all seams a minimum of 4 (101.6 mm). Commentdocument.getElementById("comment").setAttribute("id","a733473829bd6f8b807ed637136c962f");document.getElementById("ff2402c4b2").setAttribute("id","comment"); Save my name, email, and website in this browser for the next time I comment. This method is the coating of a flexible asphalt layer with two methods: one is the torch seal and the other is a self-adhesive waterproofing membrane. Also, prevents dampness inside the building. Bentonite Pond Sealer WebSikaProof Bentonite can be applied to damp concrete, however, concrete must be at least 48 hours old and must be free from standing water. 87 0 obj <>stream Store on skid or pallet; cover with polyethylene or tarp. However, as thermosetting materials harden permanently when heated, these sheets can only be attached using solvent-based adhesives on the seams, and movement after application is very restricted. 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 Waterproofing Concrete Waterproofing- Types, Steps, and Advantages All openings >1 (25.4 mm) must be detailed using plywood, grout, or alternate method to provide a sound substrate. Thermosetting membrane sheets tend to stretch and are difficult to install on vertical surfaces. The first method of bentonite waterproofing we shall discuss involves stacking loose bentonite into spaces between the soil and the foundation walls. In areas under constant hydrostatic head conditions, all joints and seams are to be detailed using CLAY-TITE MASTIC. Some alternatives are available which have advantages over bentonite. 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. Exterior Waterproofing Membrane vs. Sodium Bentonite Substrate. So the effectiveness of water repellents is highly dependent on the concrete itself. 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. Trowel and sprayed bentonite applications are rarely completed anymore. We offer an array of options and newest technologies for maximum protection and expedited schedules. The chief disadvantage is that cementitious products have no give to them probably because cement just doesnt stretch to any degree worth mentioning. WebDISADVANTAGES Back up wall has to be carefully prepared to provide adequate containment Not an Adhered System water that penetrates through the membrane may travel along the concrete wall with water pressure. Liquid-applied membranes deteriorate when exposed to UV radiation and cannot withstand foot traffic. Now the soil characteristics and the size of the area being covered will determine the amount of bentonite you will need to buy. As I stated at the beginning of this post, you cant rely on bentonite only to waterproof your basement or the foundation of your house. An example of data being processed may be a unique identifier stored in a cookie. Bentonite can self-heal, is non-toxic and is relatively easy to install, but it is rarely used in places where the risk of leaks must be minimal and humidity control is necessary. Basement Systems, Inc. 2002-2023 All Rights Reserved. Discover the products used for this solution and other alternative products. With an existing house, the foundation must be excavated in order to apply bentonite sheets. He has been building, researching, teaching, writing, and consulting on high-performance homes for more than twenty years. For maximum protection to be guaranteed, you must expose the entire foundation wall so the bentonite can be applied all across without leaving any area untouched. The average bentonite price is typically $85 per ton. The coatings bridge cracks up to .4mm and the putty fills larger holes. Performance depends on surface adhesion and proper seam lapping. Types of waterproofing These sheets are self-adhering and eliminate the harmful toxins typically associated with asphalt adhesion. Clay in general displays an incredible propensity to absorb water, expanding in the process. Your Home Has Water Damage. Examine the proper alignment and adjust the sheets where required and unrolls the sheets on the floor of the structure. The most common use of bituminous coatings are under wet bolts, particularly on surfaces such as concrete foundations.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'constructionor_com-box-4','ezslot_10',110,'0','0'])};__ez_fad_position('div-gpt-ad-constructionor_com-box-4-0'); These waterproofings is made up of bitumen fabricated material as it becomes very brittle when exposed to sunlight with flexible materials such as polyurethane or acrylic-based polymers. This clay is highly expansive and when water makes contact it forms an impenetrable barrier against infiltration. 75 0 obj <>/Filter/FlateDecode/ID[<8EA4F72C7023FA0C3F0E8FFC6F5C7022><2CB06B02E8AF9A4EAF9705E8ECE02E57>]/Index[61 27]/Info 60 0 R/Length 80/Prev 579906/Root 62 0 R/Size 88/Type/XRef/W[1 2 1]>>stream Water-soluble sulphates can degrade concrete. Visit our updated. Instead of forming a barrier on the positive or negative side of concrete, they turn the concrete itself into a water barrier. You can use anywhere from 3 pounds to 10 pounds per square foot. This method translates into additional costs and requires more time to complete. In contrast to water repellents, crystalline technologies enable self-sealing. An authorized Basement Systems or CleanSpace Crawl Space contractor will schedule a meeting during which a design specialist will inspect and measure your basement or crawl space FREE of charge, provide a free in-depth book on basement or crawl space solutions (valued at $14.95) and present you with a free written estimate at no cost. WebResistant to chemicals: Bentonite waterproofing is resistant to chemicals, therefore, it will not be affected by detergent chemicals among other household chemicals. Concrete is porous and, if not waterproofed, absorbs water that can cause cracks, waterborne contaminants and chemicals that can cause deterioration. Tremco Technical Service Bulletin No. Heat with the torch the burn off film present on the beneath face of the membrane.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'constructionor_com-large-mobile-banner-1','ezslot_12',114,'0','0'])};__ez_fad_position('div-gpt-ad-constructionor_com-large-mobile-banner-1-0'); Now the membrane will prepared for bonding with the fundamental concrete surface. DESCRIPTION How much bentonite you use for sealing your pond depends on the surface on your pond. In this 36-wythe foundation wall there is an interstitial space into which the Koster injection system was installed. Bentonite sheets are most beneficial for blindside wall applications as they can be nailed directly to the foundation walls. Waterproofing is the application of impermeable layers on the surfaces of foundations, walls, roofs, and other parts of the building which may be concrete, leather, fabric that provide a surface impermeable barrier is to prevent water penetrations. Lack of dependable resistance to vapor migration. You can use bentonite for basement waterproofing or pond sealing. The HDPE provides the first layer of waterproofing, while the bentonites self-sealing capabilities ensure positive puncture protection under hydrostatic conditions. Whats the best method and the best material? As for residential fixes, this method has been used for more than 50 years by contractors. It prevents seepages from the ceiling and walls. The traditional form of bentonite was extremely labor intensive and required skilled workmen for precise applications. Injection holes or ports are drilled into an interstitial space or right through to the exterior of foundation concrete, typically spaced 18 to 24 inches on center. Bentonite is granulated smectite clay that provides waterproofing capabilities by swelling to nearly 15 times its dry volume when it absorbs water. Penetrating crystalline systems must pass the rigorous USACE CRD C48-73 waterproofing test. Concrete treated with these admixtures contains chemicals that lie dormant within. Reading the different types and their benefits made me realize that waterproofing in concrete is necessary. Kansas & Using this approach, a layer of bentonite is set in between two geotextile sheets. This site is protected by reCAPTCHA and the Google. CLAY-TITE installation must be confined by a minimum of 24 lb./ft.2 (117.2 kg/m2). It must also take place in an adequately confined area to avoid lifting or cracking the concrete slab. CLAY-TITE HSR from W. R. MEADOWS may be required in this installation. For installation temperatures below 40 F (4 C), use CLAY-TITE MASTIC in place of CLAY-TITE ADHESIVE. 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. Also be reminded that soil hydrostatic pressure is usually on the high side after a heavy downpour of rain, which could cause water to enter your basement. This method of bentonite waterproofing is pretty straightforward, although it has some downsides. Basement waterproofing by no means is an exciting topic to write about, but you did an excellent job keeping it entertaining and not boring. There are also many more steps to follow that imply using additional materials. This would also mean you would incur some extra costs, and expend some time since excavation is a long process. The polypropylene fabric protects the bentonite from direct installation of shotcrete. The basement is one of most vulnerable parts of a home, thanks to the fact that it tends to be surrounded by soil. Bentonite sheets typically contain 85 percent to 90 percent montmorillonite clay and a maximum of 15 percent natural sediments such as volcanic ash. As you can imagine, the injection approach is not inexpensive, but when you have little to no tolerance for moisture intrusion in a below-grade space, its good to know that the space can be waterproofed. Our knowledgeable, technical sales representative are available to discuss these options and how you can best prevent water intrusion. The crystalline formula can allow concrete to self-seal hairline cracks up to 0.5 mm (0.02 in. Bentonite waterproofing has its own drawbacks. WebIt makes waterproofing more difficult as the pressure tends to force water into any crack or imperfection in the structure Capillary action is the second environmental force of which you should be aware. The clay is usually applied in thin sheets, but it can also be sprayed onto the foundation. Electron microscope image of Xypex crystals. Designed for use below-grade, CLAY-TITE is equally effective in installations where the waterproofing is pre-applied prior to pouring of the concrete or when used for standard applications. More recent technologies have also made negative-side applications possible. Because the membrane can puncture and tear during backfilling, protection boards also need to be installed. It's a remedial solution that seems to work. How to keep water out of basements and crawlspaces, The difference between hydrostatic pressure and wicking. Sodium bentonite can absorb water until it has expanded to as much as 15 times its original size when dry. As with most basement waterproofing projects, the first steps involves excavating the soil around your foundation. This creates problems stemming from soil's tendency to absorb and retain moisture moisture which will begin penetrate through any cracks or gaps in your foundation walls. 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. Pre-curing and post-curing stresses cause cracking in any concrete, which creates pathways for water passage. Heat Pump or Furnace: Which is Better for Comfort? PRODUCT DATA SHEET SikaProof Bentonite Copyright 2023. Site Map Bentonite waterproofing goes by other names, like hydroclay sodium bentonite and granular bentonite.. Bentonite is mixed with water to form a slurry that can be applied to the surface of a structure to create a waterproof barrier. Visit our updated, This website requires certain cookies to work and uses other cookies to help you have the best experience. The complete source for building, designing, and remodeling green homes. WebThe top of each length of SikaProof Bentonite shall be fixed to the concrete (if post fixed) or formwork (if pre fixed) at max.