In general, drainage core widths of 1/4 to 1/2 inch provide drainage flow rates 3 to 5 times the rate of commonly used natural backfill materials. One is that they will not span any cracks that develop in the foundation walland foundation cracks are viewed as all-but-inevitable. 3. ArmorDrain 150 Drainage Mat is considered a green product, and can be used toward LEED building credits. 30 to No. But experts caution against coating an entire wall with a urethane or epoxy sealer that is not vapor permeable. Store properly in original, unopened, undamaged sealed packaging in dry conditions, flat and wrinkle free at temperatures between 40 F and 95 F (435 C). 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. % Caution is advised with use over softer liquid applied materials as the drainage layer may dig into and breach the membrane. Waterstops are manufactured products available in a wide range of configurations and sizes. Condensation is possible in below grade conditions in warmer more humid summer conditions as below grade spaces tend to be cooler in the summer because of the insulating effect of the backfill soil. 4. It is used for drainage, protection, filtration, and hydrostatic pressure relief. (51 mm) PVC pipe at 8 ft (2400 mm) on center, allows water on the interior to reach the foundation drain. 9 0 obj Common materials include polyvinyl chloride (PVC), neoprene, expanding sodium bentonite and thermoplastic rubber. All drain tile piping should be laid onto large, river-washed aggregate stones, which is laid onto a filter fabric, which should be wrapped around and over the drain tile to try to prevent fine soils from filling the drain tile. As building scientist Joseph Lstiburek explains in this online video, water can exert a lot of force: The pressure of just 1 in. Typical hydrostatic and soil pressures generally range from 30 to 62.4 psf per foot of depth. The membrane would provide a vapor barrier and a capillary break. Design considerations include selecting an appropriate design to achieve the required flow rate. fax +1 (201) 804 1076. This area should also be properly vented. This can be handled from the outside (positive side repairs) or from the inside (negative side repairs). The performance of liquid-applied and sheet membranes is the same, he says, and costs are similar. Dimple drainage sheet, drainage membrane, drainage board, cuspated drain mat, drainage mat with dimple, cuspated drain board. As this Building Science Corporation paper explains, the concrete slab can be cut back along the edge, a trench dug to accommodate drain pipe and crushed rock, and an interior sump pump installed to get the water out of the basement. Bentonite clays act as waterproofing by swelling when exposed to moisture thus becoming impervious to water. Some systems include reinforcing mesh embedded into the liquid. Cementitious SystemsThese systems contain Portland cement and sand combined with an active waterproofing agent. For many membrane types, a multiple layer detailing of the membrane, proper isolation and allowance for joint detailing is generally effective for construction joints. The companys EasyDri is a single-component polyurethane thats used to treat a crack, not the entire wall, says brand sement menager Amanda Helber. They are used in wet areas such as kitchens and other environments requiring frequent washdowns. membrane at the foundation wall in addition to FOAMULAR & FOAMULAR NGX INSUL-DRAIN board. Width 1 m, 1.5 m, 1.8 m, 2.0 m, 2.9 m, 3 . Dampproofing resists vapor migration in the absence of hydrostatic pressure. The designer must consider the overall water management system relative to site conditions and loadings to determine if dampproofing or waterproofing is required. Available in the following dimensions: Width (less flap) 39 inches Width (with flap) 43 inches Length 61.5 feet In general, when properly designed, non-woven products have good filtration and separation properties. Consult with a structural engineer regarding possible movement. Coarse sands varying from No. The water flow rate is equal to or better than the aggregate backfill. 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. Flower beds, overhanging decks, nearby neighbors and a variety of other site conditions may make this difficult, and it will be expensive. What adhesives may be used for installing drainage mat to Tremco below-grade waterproofing membranes? Simple dampproofing materials like asphaltic foundation coatings have two drawbacks. If in doubt, it is clearly prudent to err on the conservative side and provide a waterproof system. Moisture control is dealt with in a multiple screen/barrier type of design approach. All core joints and terminations must be covered by fabric overlay. Some systems include reinforcing mesh embedded into the liquid. Sika Drainage Mat 1000 Sika Drainage Mat 1000 consists of a high density polyethylene geonet drainage core with its ridges heat fused to a layer of nonwoven polypropylene filter fabric on the top side and a heavy duty non-woven polypropylene membrane protection fabric on the bottom side. Repairs from the outside involve digging a trench on the outside of the foundation, adding perimeter drains if they do not already exist, and adding dimple mat or another type of membrane to the outside of the foundation wall. If Bentonite clay is unconfined, it can shrink upon drying, creating gaps that undermine waterproofing characteristics. Sq Ft: 325 Material Thickness: .45 inch Core Material: Polypropylene Free Shipping Need a written quote? Moisture that penetrates through the upper screen needs to be directed to the exit drain located at the base of the foundation wall. Disclaimer, Unified Facilities Guide Specifications (UFGS), Unified Facility Guide Specifications (UFGS), Federal Guide for Green Construction Specifications, Energy-Efficient Products and Technologies. Dimple mat, or dimple board, is a product that seems to fall somewhere in between simple asphaltic dampproofing and a full-on waterproofing membrane. As most foundation wall systems have substantial mass, e.g. These walls may also be used in the lateral resisting system for the building. Basements are increasingly becoming in-law suites, man caves and home theaters where finish materials rival those in above-grade parts of the house, Straube says. Descriptions and guidelines are provided on the following topics: Drainage Materials for below grade enclosures include: Aggregate Drainage LayersAggregate drainage layers include graded pea-gravel aggregate or coarse sands. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Thats s no longer the case. Most waterproofing materials also control vapor diffusion. First, lets keep in mind that Peter would be the last person to claim lab-like precision with his testing. Readers are advised to obtain expert advice when designing systems which are below the water table or which are enclosing particularly vulnerable occupancies. Although liquid-applied membranes are seamless, their potential weakness is inconsistent application resulting in uneven thickness on the concrete. The second area is the finish to the exterior near grade level. Markets. 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. About The filter fabric helps prevent roots from affecting the efficiency of the drainage/aeration layer as well as retaining soil or other fine particles from being washed away and allows water to pass into the drainage core. 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. 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. Regarding slope to drain, drain tile is intended to be installed with some slope to ensure that the water moves toward the sump collector. Fluid-applied membranes are applied in liquid form and cure to form one monolithic seamless membrane. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. Details, Waterproofing/Drainage Product Selector Guide, TD-C-01: TREMDrain at Inside/Outside Corner (DWG), TD-C-01: TREMDrain at Inside/Outside Corner (PDF), TD-G-01: TREMDrain with Tremco Waterproofing at Footing (DWG), TD-G-01: TREMDrain with Tremco Waterproofing at Footing (PDF), TD-G-02: TREMDrain with Tremco Waterproofing at Retaining Wall with Weep Hole (DWG), TD-G-02: TREMDrain with Tremco Waterproofing at Retaining Wall with Weep Hole (PDF), TD-G-03: TREMDrain with Tremco Waterproofing at Shoring Wall with Weep Hole (DWG), TD-G-03: TREMDrain with Tremco Waterproofing at Shoring Wall with Weep Hole (PDF), TD-G-04: TREMDrain with Universal Tee at Blindside Wall Connections (DWG), TD-G-04: TREMDrain with Universal Tee at Blindside Wall Connections (PDF), TD-G-05: TREMDrain with Tremco Waterproofing at Horizontal Application (DWG), TD-G-05: TREMDrain with Tremco Waterproofing at Horizontal Application (PDF), Drainage/Protection Course Recommendations, Globally Harmonized System (GHS) Guide and Classification, TREMDrain Series-Between Slab, Planters & Pavers, Below Grade Cold Fluid-Applied Waterproofing Vertical Applications Warranty, Self-Adhered Sheet Waterproofing Warranty. Based on some extensive excavation and waterproofing experience, it has been found that corrugated PVC drain tile piping can collapse under the weight of backfill, and the preference is to use stiffer PVC pipe if possible. It is always better to have a continuously bonded and adhered waterproofing layer to reduce the potential for lateral moisture migration beneath the membrane. %PDF-1.7 Styrene-butadiene rubber compounds cure to a flexible, rubbery consistency. The sump basin is always capped with a lid that is vapor and air tight. Manufacturers of Rainscreen Drainage Mat. Laps should be installed so that the upper sheet is lapped over the lower sheet so that water is shed naturally across the lap. Concrete walls, either inside or outside, are flaking. Lyndhurst New Jersey 07071 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). Special treatment is also needed at all door entries. Soil loadings vary with soil type and whether soil is treated as active or passive. Common knowledge suggests that the seals serve as a back-up function and that avoiding moisture build-up is the principle objective for obtaining a leak free building at penetrations. There are other back-up systems that can be employed in wall/floor construction joints, including injection tubes that can be installed in the joints prior to concrete placement and then injected with chemical grout after construction if the waterproofing and waterstop lines of defense are not completely effective. In some cases, the tubes may also be re-injected if leakage persists. In these cases, the concrete foundation wall is placed against the blind side waterproofing membrane. This is called spalling. The key question that remains is whether to provide dampproofing or waterproofing to the surface of the foundation wall or not at all. This high strength non-woven geotextile is designed to protect the drainage composite during and after construction. Perimeter drains of 4-inch Schedule 40 PVC covered with coarse gravel or septic rock in filter fabric completes the installation. Asphaltic coatings may be solvent- or water-based. PVC and polyethylene pipes are available in smooth or corrugated configurations and are slotted on the bottom half of their cross-section to allow water infiltration. Waterproofing membranes can be categorized into four (4) types: Fluid-Applied SystemsThese systems include urethanes, rubbers, plastics and modified asphalts. When Peter tried plugging an active leak with Drylok Fast Plug hydraulic cement, the column continued leaking, including right at the plug. 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. Location of the slip plane may vary depending on the design; however, it should be included in all assemblies. A few thousand bucks up front on a site where conditions are questionable seems like good insurance. For waterproof systems the first consideration is whether to use positive or negative side waterproofing. (11 mm) thick geocomposite drainage sheet system, comprising a hollow studded polypropylene core, covered on one side with a nonwoven, needle punched polypropylene filter fabric and on the other side with a smooth polymeric film. Imperfections in the sprayed coat are repaired or filled with the sealant (Risinger recommends Poly Wall 2200). The heat fuses layers together and overcomes some of the shortcomings of self-adhering membranes by providing complete coverage of joints and other details. Extruded polystyrene insulation boards should be properly supported on the footing to prevent vertical movement. 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. Sika Drainage Mat 420 and 720 consist of an impermeable high flow dimpled polypropylene drainage core heat-bonded to a layer of non-woven polypropylene (420) or woven polypropylene (720) filter fabric on the top side and a polyethylene membrane protection film on the bottom side. For application from the exterior, the next design decision is to use fluid applied or sheet products. What are the advantages of a Tremco drainage mat versus aggregate backfill? A protective sleeve that is two sizes larger than the pipe is required for any pipe that passes through a concrete foundation wall or footing. Structural Support, Environmental Control, Finish, and Distribution as they relate to the below grade enclosure elements of foundation walls. BROWSE CATALOG. Even when it is necessary to apply a waterproofing membrane, it is recommended to also utilize a system approach including components of exterior drainage system, near surface drainage system and exit drain. Drainage mat can be fitted with outlets and drainage accessories to further move the water away from the structure. endstream For foundation wall applications, typical cold applied fluid applied systems are approximately 60 mils in thickness. Hydrostatic pressure loads may exist in cases of high water tables or flood events. 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. Click to enlarge. 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. However, water removal measures around foundation walls below the water table may be impractical and expensive over the long-term and the waterproofing strategy becomes critical. by Mark Postma, PE, Carl Walker, Inc. The drainage board should have the protection sheet on the backside of the core to promote better movement against the insulation. What are we to make of these wingnut results? Drainage mat is principally designed to reduce hydrostatic head pressure and direct water to a perforated drainage system. 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. Drainage Mat 202. Because of the unique nature of penetrations and Special Features, no single rule or criteria can govern or apply to the effective treatment thereof. Many areas around a building's perimeter at grade are subjected to high amounts of surface runoff from the high use of fenestration and impermeable wall faade materials, such as thin stone and EIFS. Finish FunctionsTwo areas of finishes are of importance in relation to foundation walls. While the first control of these abnormal load events are through security entry control systems and restricted access, structural design considerations may also be required in the design of the foundation wall system. Hot applied, rubberized asphalt systems can be 125 mils to 180 mils thick, plus embedded 60 mil neoprene sheets. A variety of sheet- and liquid-applied membranes can be used, all designed to resist the hydrostatic pressure of ground water. The first area is the finishes of the interior space. Drainage board should have the protection sheet on the conservative foundation drainage mat thickness and provide vapor. 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In foundation drainage mat thickness foundation wall is placed against the blind side waterproofing membrane thousand bucks up front a! Potential for lateral moisture migration beneath the membrane the water away from the outside positive!