Shotcreting can result in undesirable conditions such as voids behind reinforcing steel, and as a result some waterproofing manufacturers do not recommend their products for this application. Materials used may be concrete or reinforced masonry. An interior drainage layersuch as dimple mat or sheet waterproofing membranecan be added. However, a double coat of this paint-like material was not enough to prevent some water from seeping out at the bottom of the column. Even these systems should only be considered for use as a secondary (back-up) waterproofing to a positive-side waterproofing system, unless they are used with special details provided by a waterproofing expert which are beyond the scope of what are usually provided by system manufacturers. Blog Then he filled the hollow cores of the columns with water to see whether the coatings worked. Readers are advised to obtain expert advice when designing systems which are below the water table or which are enclosing particularly vulnerable occupancies. Surcharge loadings may include live loads from pedestrian walkways or from vehicular roadways. of RDH Group, Scott A. Harvey, AIA, RWC, LEED AP of Applied Building Sciences, and Joshua Kelly of Simpson Gumpertz & Heger Inc. Where expansion and contraction of the services or pipes entering the building occurs, a sleeve through the wall that is discontinuous with the penetration piping is required. Available Thickness: 6mm (.25") Roll Size: 39" x 61.5' Roll Weight: 16 lbs . In some situations, it may not be possible to apply waterproofing directly and entirely to the foundation walls, and it may be necessary to fasten a "lens" membrane to the foundation wall to catch runoff and redirect it away from the foundation. Some systems include reinforcing mesh embedded into the liquid. Notre that leakage may occur at a penetration and flow behind the waterproofing if a lateral path exists. No one size fits all, he said in a telephone call. Once bit, twice shy, Stock said in a call. by Mark Postma, PE, Carl Walker, Inc. Thermal considerations are of limited concern as one gets deeper down on the foundation wall as there is a constant, thermal design condition on the exterior. Many waterproofing membranes need to be shielded from ultraviolet radiation to prevent deterioration and as such some type of exterior finish is required. The inherent difficulties of fixing water leaks on an existing foundation are a good reason to consider doing more than simple dampproofing when you have the choice. The lens membrane should slope away from the building and collect and redirect the runoff to a drain tile or sump away from the foundation. Moisture control is dealt with in a multiple screen/barrier type of design approach. Many drainage mats also include a polyethylene sheet backer to uniformly disperse the loads imposed on the membrane and reduce the potential for damage caused by non-uniform profiles (dimples) in the composite core. In one of what he calls his Wingnut Real-World Tests, GBA technical director and building consultant Peter Yost experimented with several waterproofing compounds: UGL Drylok Extreme, Koster NB1 Grey, and Xypex Concentrate. Penetrations are any openings in the wall or structural system that, if not properly waterproofed, provide an avenue of breech for moisture entry into the building. Manufacturers of Rainscreen Drainage Mat. The interior environment that the foundation wall is subjected to includes environmental control loadings such as thermal and moisture. Drainage Mats. Contact water/dampproofing membrane manufacturers for specific information regarding compatibility with FOAMULAR & FOAMULAR NGX INSUL-DRAIN boards. When a dimple mat is placed against a concrete wall, the dimples make the plastic stand out from the wall, leaving a free-draining air space between the plastic and the concrete. If in doubt, it is clearly prudent to err on the conservative side and provide a waterproof system. Backfilling should commence as soon as possible after installation of the drainage mat. 201 Polito Avenue Become a member and get unlimited site access, including the Download Data Sheet get_app. Additionally, the composite cores have sharp corners that can cut the waterproofing membrane during installation or backfill operations. This is called spalling. For codes/standards refer to General Overview section. According to the Concrete Network, liquid-applied membranes go on quickly, and are relatively low in cost. Find Your Sales Rep location_on. According to IS 1080, mat foundations must have a minimum depth of 50 cm. This separation of differing soil types maintains flow rates of soils used as drainage layers and minimizes settlement from finer materials filling in more coarse materials. Environmental Control FunctionsThe exterior environment that the foundation wall is subjected to includes environmental control loadings such as thermal, moisture, tree roots, insects, and soil gas. When pumps are to be relied upon to discharge moisture, a backup power system should be provided in the event of power failure. Some but not all sheet membranes are applied over a primer, and manufacturers offer versions that can be applied in temperatures as low as 0F. Perimeter drains of 4-inch Schedule 40 PVC covered with coarse gravel or septic rock in filter fabric completes the installation. Waterproofing membranes can be categorized into four (4) types: Fluid-Applied SystemsThese systems include urethanes, rubbers, plastics and modified asphalts. One potential disadvantage is the inability of some liquid products to span cracks or opening of construction joints, which may occur on new buildings soon after application. Foundation WallTypical System (Detail1.2.1)DWG|DWF|PDF, Foundation Wall SystemBlind-Side Waterproofing (Detail1.2.2)DWG|DWF|PDF, Foundation WallFluid-Applied Membrane System (Detail1.2.3)DWG|DWF|PDF, Foundation WallSheet Membrane System (Detail1.2.4)DWG|DWF|PDF, Foundation WallPipe Penetration Detail Without Sleeve (Detail1.2.5)DWG|DWF|PDF, Foundation WallPipe Penetration Detail With Sleeve (Detail1.2.6)DWG|DWF|PDF, Foundation WallFaade Transition to Masonry Veneer (Detail1.2.7)DWG|DWF|PDF. A special flashing behind face stones of buildings or special flashing and treatment of the exterior slab edge where it is adjacent to ground features is required. For example, crystalline waterproofing is often used to provide redundancy to one of the other waterproofing systems. Next is an insulation layer, followed by drain board with an integral air gap. Hammer & Hand, the design/build company in the Pacific Northwest, recommends in its Best Practices manual a liquid-applied elastomeric membrane directly over the concrete, followed by drainage mat with integrated filter fabric. At roll ends and abutments without overlaps peel back fabric and remove 4'' (10.2 cm) of core then secure overlap. The designer must consider the overall water management system relative to site conditions and loadings to determine if dampproofing or waterproofing is required. The plastic composite "dimpled" drainage cores are available in various configurations and are typically constructed using polypropylene, polystyrene and polyethylene. (This assembly looks a lot like an above-grade rainscreen wall, with the dimple mat taking the place of exterior cladding, and the dampproofing filling the role of a water-resistive barrier.). For foundation wall applications, typical cold applied fluid applied systems are approximately 60 mils in thickness. xKn!DLKN"egorGE !u2:y Bentonite ClaysThese systems include composite sodium bentonite systems with HDPE liners and geotextile fabrics, which are more common and more effective than the traditional systems. Two of the productsKoster NB1 Grey and Xypex Concentrateare so called crystalline coatings, which are designed to seep into the concrete and form a crystalline matrix when they cure. But, he adds, just as water makes the bentonite swell, a lack of water makes the panels shrink. Hot applied, rubberized asphalt systems can be 125 mils to 180 mils thick, plus embedded 60 mil neoprene sheets. Building codes also generally require waterproofing if the ground-water level cannot be maintained at least 6 in. Width 1 m, 1.5 m, 1.8 m, 2.0 m, 2.9 m, 3 . For uneven rubble foundations, a layer of spray foam insulation can be applied over the waterproofing membrane, as the illustration below shows. The information contained therein is not intended for actual construction, and is subject to revision based on changes and or refinements in local, state, and national building codes, emerging building envelope technologies, and advancements in the research and understanding of building enclosure failure mechanisms. With some coaxing, the two crystalline coatings did keep water out. ft/roll Sheet products are advantageous in terms of consistency in product material properties and thickness, but the primary drawback is the numerous laps that are required. Structural Support FunctionsThe foundation wall system of the below grade building enclosure must be designed and constructed to support both vertical and lateral loadings. Liquid-applied varieties can be sprayed, rolled or troweled onto the surface, typically to a thickness of 60 mils wet (curing to 40 mils). Dimple mat is approved as a stand-alone productit can be used to satisfy code-required dampproofing (this is not the case in Canada, however, where a drainage layer also is required). The most commonly used protection board is a semi-flexible sheet containing an asphalt core placed between asphalt impregnated glass fiber mats. The layers would consist of a dampproofing layer, a dimple sheet to provide an air gap, and then a drainage sheet with a geotextile layer that sheds water down to the bottom of the wall where it is picked up by the perimeter drain. After spraying on a 60-mil layer of styrene-butadiene rubber, Risinger explains in this article in the Journal of Light Construction, he adds a heavy bead of sealant at the cold joint between the wall and the footing. Where the foundation wall is required to be waterproofed, adding a waterstop to the construction joint is recommended. 8 sieve are suitable. For most portions of the foundation wall, water removal and control is of prime importance. Fabric covered channels drain water from vertical foundation walls. Drainage pipes, typically 4" or 6" in diameter, used in below grade systems are primarily made of corrugated PVC or polyethylene and in some cases of porous concrete. Dampproofing materials are generally applied by sprayer, roller, brush, or trowel and are often bitumen based coatings; typically applied up to 10 mils (0.25 mm) in thickness. 5 0 obj As moisture moves from the upper screen through the drainage system on the exterior towards the exit drain, moisture will inevitably make its way toward the surface of the foundation wall itself. TREMDrain NW provides an economical solution for single-sided subsurface drainage applications requiring a typical non-woven filter fabric bonded to a lower compressive strength and moderate flow capacity formed core. Tremcos HDPE/Bentonite is typical of these products. However, since some municipalities charge for water pumping into storm drain systems, these costs must be weighed over the life of the structure when designing the waterproofing systems. Depending on the quantity of water that makes its way through the upper screen, a drainage system at the surface of the foundation wall is generally required to direct this water expeditiously toward the base of the foundation wall and the exit drain. For some membrane applications such as hot-applied bitumen systems, the protection board is embedded into the wet membrane forming an integral part of the waterproofing membrane. These flashings are usually stainless steel to resist corrosion in contact with grade soils and moisture. x\#}Whl??b ]f7)m*r~?q4 The TREMDrain is used with TREMproof and Paraseal waterproofing membranes serving both as a protection course and replacement for traditional pipe and stone drainage systems. Waterproofing resists both vapor migration and hydrostatic pressure. To do so, Peter built hollow columns of 8-by-8-inch masonry block and waterproofed the outside according to directions provided by the manufacturer. These details must be properly detailed and installed to be effective. When Peter tried plugging an active leak with Drylok Fast Plug hydraulic cement, the column continued leaking, including right at the plug. The filter fabric retains soil or sand particles as well as freshly placed concrete or grout, allowing filtered water to pass through to the core. Available in the following dimensions: Width (less flap) 39 inches Width (with flap) 43 inches Length 61.5 feet Tremco also offers a negative side spot treatment for cracks. Creates a drainage/ventilation cavity environment behind natural and manufactured stone veneer walls. In combination with bentonite sheet waterproofing, these voids can be detrimental, since the bentonite can swell into the voids and loose its waterproofing integrity. below the bottom of the slab-on-ground. Aggregate backfill needs to be trucked to the site and the dirt backfill hauled from the site. One of them, Texas-based Matt Risinger, starts with a liquid-applied or peel-and-stick membrane that is applied directly to the foundation wall (he fills any large voids with mortar first). Lyndhurst New Jersey 07071 Some systems include reinforcing mesh embedded into the liquid. In all cases, installing a perimeter drain below the level of the basement floor is essential. Standard Drainage Mats. 2023 The Taunton Press, Inc. All rights reserved. Structural Support Functions The floor slab of the below grade building enclosure must be designed to carry downward vertical gravity loadings as well as . Dampproofing resists the passage of liquid water that is not under hydrostatic pressure, which is the case when the foundation is backfilled with a well-draining material and is not subjected to standing water. Resources FOAMULAR & FOAMULAR NGX INSUL-DRAIN Drainage Board is designed specifically for foundations to improve thermal foundation performance through a higher R-value. In stock and ready to ship. UGL Drylok Extreme is guaranteed to resist 15 feet of head and last for as long as 15 years. Straube suggests a three-tiered approach to protecting the foundation, with the choice hinging on site conditions and budget. Thats the thinking behind Risingers approach, and Stocks experience on the retrofit side would seem to back him up. In these cases, the concrete foundation wall is placed against the blind side waterproofing membrane. As building scientist Joseph Lstiburek explains in this online video, water can exert a lot of force: The pressure of just 1 in. Common areas of concern for waterstops are at corners and laps in the materials. That said, UGL Drylok is apparently not able to resist hydrostatic pressure, at least with that amount of head in the CMU column he built. Typically, the waterproofing is wrapped over a masonry brick shelf, or up behind the finish exterior materials at grade so that it may be terminated and shingle lapped by the weather barrier. The top edge of the membrane should be sealed to the foundation. Negative-side waterproofing systems are post-applied to the surface of the element opposite the surface exposed to moisture, typically the interior of the foundation wall. Areas designed as pedestrian areas should also include consideration for emergency vehicular loadings. Soil loadings vary with soil type and whether soil is treated as active or passive. What are we to make of these wingnut results? 3. Methods for concrete placement include cast-in-place between the lagging and interior forms, or spray applied shotcrete. DELTA-MS is a dimpled membrane that uses our exclusive Air-gap Technology to ensure your basements stay dry and last longer. % Woven products are constructed using individual threads or filaments and have good strength and stiffness; however, the material can be penetrated by angular aggregate reducing the ability to properly filter or separate fine elements. The TREMDrain Series consists of prefabricated drainage mats for vertical and horizontal applications with a variety of combinations of filter fabrics, drainage cores and protective polymeric film and a Total-Drain System to replace perforated pipe/aggregate collection systems. Drkens version is called Delta MS. Understanding the specific chemical admixture is important in determining its potential performance in below-grade dampproofing or waterproofing applications. Dryvit Drainage Mat is a flexible, thermally preformed, in a zigzag configuration, mat made of polyamide and produced in a pale blue color for identification. Drainage mat does not. They perform a multi-faceted role by providing protection for RoofPro and Sikalastic-320 NS/SL membranes as well as a means of collecting and conveying excess water in plaza decks, split slabs, planters, roof gardens and other roofing and waterproofing applications. The junction of concrete foundations and wood framing is prone to air leaks and moisture issues. As Stock points out, the solution has to take site conditions into account. ASTM D6525 Composite Thickness 0.27 (6.8) in (mm) ASTM D3774 Core Width 48 (1.2) in (m) NA Roll Weight 16.0 (7.2) lbs (kg) NA Roll Length 50 (15.2) ft (m) Protection Boards are used to shield waterproofing membranes from construction damage, damage from backfill materials in service, and ultraviolet radiation. Asphaltic coatings may be solvent- or water-based. Every variant of EnkaDrain foundation drainage mats is based on the same basic concept: A three-dimensional composite that consists of a drainage core either connected to one or sandwiched between two nonwoven geotextile fabrics. Attach mat to membrane surface with Sikaflex 11FC or approved adhesive as necessary to keep in position. Cosella Dorken Products. When it is wrapped over masonry ledges, care must be taken to coordinate with masonry ties and thru-wall flashings. TREMDrain NW is ideal for vertical walls less than 20 feet. 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Quickly, and are relatively low in cost a waterstop to the concrete Network, liquid-applied membranes on...