UGL Drylok Extreme is guaranteed to resist 15 feet of head and last for as long as 15 years. This is accomplished through a drainage system at the exterior of the wall that is typically a free draining granular material. Water that makes its way past the face of the sheet should make run down to perimeter drains at the base of the wall without hydrostatic pressure that would cause problems. They can be applied with a sprayer or with a brush, and in many parts of the country thats all the foundation walls will get in the way of moisture control. 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. The first area is the finishes of the interior space. 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. Appropriate use and application of the concepts illustrated in these details will vary based on performance considerations and environmental conditions unique to each project and, therefore, do not represent the final opinion or recommendation of the author of each section or the committee members responsible for the development of the WBDG. ArmorDrain 150 Drainage Mat is considered a green product, and can be used toward LEED building credits. Wood is frequently warped, and concrete is never flat. But, he adds, just as water makes the bentonite swell, a lack of water makes the panels shrink. In these cases the remaining part of the system is a dampproofing applied directly to the exterior surface of the foundation wall. If Bentonite clay is unconfined, it can shrink upon drying, creating gaps that undermine waterproofing characteristics. Although thats still a common approach for dampproofing foundations, builders also will find a range of other products, from peel-and-stick waterproofing membranes to liquid-applied synthetic rubber designed to span cracks in the concrete that are bound to develop in time. The core is installed dimpled side down to allow water retention within the cups. These systems provide a secondary barrier to the passage of water across these construction joints. Aggregate backfill needs to be trucked to the site and the dirt backfill hauled from the site. First, lets keep in mind that Peter would be the last person to claim lab-like precision with his testing. 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. The drain should be placed below the top of the footing. Protection Boards are used to shield waterproofing membranes from construction damage, damage from backfill materials in service, and ultraviolet radiation. And for that, any amount of water is a potentially serious problem. An option used less frequently is a thermofusible membrane. The filter fabric retains soil or sand particles as well as freshly placed concrete or grout, allowing filtered water to pass into the drainage core. Some systems include reinforcing mesh embedded into the liquid. When cracks in a concrete foundation are not structural, they can be repaired by injecting them with epoxy or urethane from the inside. Consult with a structural engineer regarding possible movement. Cosella Dorken Products. Depending on the size of the sleeve and the size of the footing, the footing may need to be deepened as shown to provide the required minimum 3 inches of concrete coverage for the rebar . 30 to No. 3. TREMDrain NW is ideal for vertical walls less than 20 feet. What are the advantages of a Tremco drainage mat versus aggregate backfill? 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. The product is packaged in a 39 in (990 mm) by 250 ft (76 m) roll and is approximately 1/8 in (3.2 mm) thick. 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 heat-welded seaming is employed and loose-hung membranes are tough and protected from damage by protection board, they may be effective waterproofing materials, but if a leak occurs, the leak will be difficult to locate and correct due to the loose application of the waterproofing layer in those cases. The effectiveness of this initial screen in shedding moisture may influence the design of the other components of the system. Where grade slopes down along an exterior wall, the waterproofing will step down incrementally so that it continues to protect the below grade, occupied space. The core is bonded to a Moisture Resistive Filter Fabric that functions like an additional layer of Weather Resistant Barrier. Although not as common, pre-installed permeable grout injection waterstop may also be considered. a slope of at least 1/8 inch per foot of drain or 1 percent should be provided). BROWSE CATALOG. It is a high-density polyethylene sheet combining recycled and virgin materials whose surface is studded with 5/16-inch-tall dimples. Clay panels and geotextile sheets are popular for use in blind-side waterproofing applications such as on retaining earth systems and elevator and sump pits. Thats the thinking behind Risingers approach, and Stocks experience on the retrofit side would seem to back him up. For foundation wall applications, typical cold applied fluid applied systems are approximately 60 mils in thickness. Extruded polystyrene insulation boards should be properly supported on the footing to prevent vertical movement. The companys EasyDri is a single-component polyurethane thats used to treat a crack, not the entire wall, says brand sement menager Amanda Helber. When pumps are to be relied upon to discharge moisture, a backup power system should be provided in the event of power failure. These are EnkaDrain foundation drainage mats. The geotextile keeps sediments out, and the textured surface of the membrane creates an air gap to relieve hydrostatic pressure. Manufacturers of Rainscreen Drainage Mat. TREMDrain NW is a two-layer drainage mat consisting of a polystyrene core and nonwoven, needle-punched polypropylene fabric. The Foundation Protection System that Keeps Basements Dry Protecting your foundations from water and moisture is critical. 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. Apply 6-mil-thick polyethylene sheeting or a self-adhesive waterproof membrane to the entire exterior side of the below-grade walls before backfilling. Building codes also generally require waterproofing if the ground-water level cannot be maintained at least 6 in. Homeowners at one time expected their basements to be wet once in a while. 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. With drainage, both of these procedures are eliminated. On low risk sites where free-draining backfill and perimeter drains are provided, especially where basement use is limited, dampproofing may make sense to a developer looking for any way to cut costs. The goal of 'Whole Building' Design is to create a successful high-performance building by applying an integrated design and team approach to the project during the planning and programming phases. 3M Holdfast 70 M has been independently evaluated by 3M and Tremco below-grade waterproofing membranes are listed as compatible on their web site. Sewer pipe penetrations, water line entry penetrations, drain basins in the floor slab or sleeves for electrical, gas or communication are all common penetrations, typically with their own design or detailed features. The integration of the two systems requires careful consideration to insure that all moisture, air and thermal criteria for each system are satisfied at the transition interface. The key question that remains is whether to provide dampproofing or waterproofing to the surface of the foundation wall or not at all. They were used mainly for storing coal and potatoes. The drain board protects the waterproofing layer while relieving hydrostatic pressure. Backfilling should commence as soon as possible after installation of the drainage mat. 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. With enough of a hydrostatic head, water will be forced up through the slab even if the walls are watertight. However, classification of common penetration types and features helps to ensure effective treatment and proper function. Why one over the other? Other cases may include an earth retention system, such as piling and timber lagging, facilitating construction and designed to resist the lateral loads leaving the foundation wall to resist primarily vertical loads. If the climate receives more than 20 inches of rain annually, a drainage mat at least inch thick should be installed over the water control layer. Waterproofing should be applied a minimum of 12" above finished grade, and then applied to a point 12" below the top surface of the interior slab on grade. Non-woven products are typically continuously extruded and spun and then needle-punched to create uniform openings that can be selected depending on the design. In general, the manufacturer's standard details should be followed. Commercial. Width 1 m, 1.5 m, 1.8 m, 2.0 m, 2.9 m, 3 . Dimple mat, or dimple board, is a product that seems to fall somewhere in between simple asphaltic dampproofing and a full-on waterproofing membrane. Maine builder Ben Bogie uses a peel-and-stick waterproofing membrane or a fluid-applied waterproofing product, also in combination with dimple mat and perimeter drains. Blind-side waterproofing systems are pre-applied to the area where the concrete element will be placed that is directly exposed to moisture. A liquid membrane cant covered with an elastomeric flashing extending to the edge of the footer and several inches above the cant has proven historically effective. Asphaltic coatings are very common. This upper screen may consist of relatively permeable landscape areas ranging to impermeable pavers, concrete or asphalt surfaces that will shed the majority of surface moisture. In general, when properly designed, non-woven products have good filtration and separation properties. Assisting were Judd Peterson of Judd Allen Group and David Young, P.Eng., P.E. A protection course is a puncture-resistant material designed to minimize or prevent possible damage to the waterproofing membrane prior to or during concrete pour and backfilling. Geotextile fabrics are typically constructed using polypropylene, polyester, or nylon and are available in either woven or non-woven designs. Straube suggests a three-tiered approach to protecting the foundation, with the choice hinging on site conditions and budget. Typical hydrostatic and soil pressures generally range from 30 to 62.4 psf per foot of depth. phone +1(201) 933-8800 Bentonite clays act as waterproofing by swelling when exposed to moisture thus becoming impervious to water. Cementitious SystemsThese systems contain Portland cement and sand combined with an active waterproofing agent. This is . Hydrostatic pressure loads may exist in cases of high water tables or flood events. Holes in drainage mats allow water and other liquid hazards to pass through the top of the mat, reducing the likelihood of injury from slipping. Long-lasting Moisture Protection, Long-lasting Satisfaction In areas with greater moisture loads from hydrostatic pressure from high water tables or sensitive interior environments, a waterproofing membrane should be applied to the exterior surface of the foundation wall in lieu of dampproofing. With drainage, both of these procedures are eliminated.3. The polymer core mesh creates the airspace, while the lighter fabric prevents mortar from seeping into the newly formed cavity. Waterstops are manufactured products available in a wide range of configurations and sizes. Thickness (ASTM D1777) 10 mm (0.40 in) 10 mm (0.40 in) 6 mm (0.25 in) 25.4 mm (1 in) . In many foundation wall situations with low water table elevations, the combination of the upper screen, the exterior drainage system, the near surface drainage system and the exit drain will control the majority of the water. In blind-side (positive-side, without access due to tight lot lines, under slabs on grade, or other reason) waterproofing assemblies, products may include sheet materials of thermofusible HDPE or PVC, bentonite, or other similar proprietary sheet products. For foundation wall applications, typical cold applied fluid applied systems are approximately 60 mils in thickness. WBDG is a gateway to up-to-date information on integrated 'whole building' design techniques and technologies. Areas designed as pedestrian areas should also include consideration for emergency vehicular loadings. Waterstops should be utilized at construction joints in below grade walls, footings, slabs, and other elements where a waterproof system is required. 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. The sealant is pushed through the entire depth of the crack to plug leaks effectively, Stock said. Condition appraisals and trouble shooting of below-grade structures reveals common sources of leakage that occur at penetrations. The drainage core is composed of tough synthetic filaments. 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. Bentonite is, therefore, most effective when properly confined so the product can swell to fill voids and so that it cannot be washed away. Builders will have to move up to a true waterproofing material when site conditions include a high water table, or when taking extra precautions against water intrusion. Waterproofing membranes can be categorized into four (4) types: Fluid-Applied SystemsThese systems include urethanes, rubbers, plastics and modified asphalts. In stock and ready to ship. Although liquid-applied membranes are seamless, their potential weakness is inconsistent application resulting in uneven thickness on the concrete. NOTE: Photographs, figures, and drawings were provided by the original author unless otherwise noted. For treatment of leaks providing amplified external drainage media similar to that required on the exterior wall is highly effective. But this approach would be more common with a brick foundation than it would with a monolithic concrete foundation. The thickness of these systems varies from 20 to 120 mils. DELTA-MS is a dimpled membrane that uses our exclusive Air-gap Technology to ensure your basements stay dry and last longer. Reading time: 1 minuteMinimum thickness of concrete slab, beam, column, foundation and other structural members is selected to meet the design requirements as per standard codes. At times these systems are run internally in the interior surface finish system or in ceiling space. Choose from our selection of grease-resistant drainage mats, drainage mats, high-traction drainage mats, and more. Its always better to treat the exterior, says Peter Barrett, product and marketing manager for Drken Systems Inc., which makes a variety of waterproofing products. Careful attention to installation is critical during both cast-in-place and shotcrete applications in blind-side waterproofing assemblies. Dampproofing/Waterproofing in all situations should be carried up above the upper screen and integrally tied into the building faade flashing and waterproofing. Waterproofing resists both vapor migration and hydrostatic pressure. With some coaxing, the two crystalline coatings did keep water out. Fabric covered channels drain water from vertical foundation walls. xKn!DLKN"egorGE !u2:y This can be accomplished with pumping systems. 1090 Vermont Avenue, NW, Suite 700 | Washington, DC 20005-4950 | (202) 289-7800 Common materials include polyvinyl chloride (PVC), neoprene, expanding sodium bentonite and thermoplastic rubber. Because of the unique nature of penetrations and Special Features, no single rule or criteria can govern or apply to the effective treatment thereof. In many applications the interior finish is simply the interior surface of the material used for the foundation wall, i.e. Even after taking these steps, Peter found a bit of seepage at certain spots on the lower part of the column. Its always better to try to keep the water out of the system than manage the water once it gets into the system.. These systems are advantageous in their lightweight design and cost effectiveness. Then he filled the hollow cores of the columns with water to see whether the coatings worked. According to the Concrete Network, liquid-applied membranes go on quickly, and are relatively low in cost. The four function categories, i.e. All core joints and terminations must be covered by fabric overlay. Regarding slope to drain, drain tile is intended to be installed with some slope to ensure that the water moves toward the sump collector. Products and techniques for managing water infiltration go far beyond the buckets of asphaltic goop that builders spread on below-grade portions of foundation walls. Become a member and get unlimited site access, including the Excess water is collected and conveyed to a proper collection system, helping to control drainage flow. 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. An interior drainage layersuch as dimple mat or sheet waterproofing membranecan be added. Floor Slab Schematic. 201 Polito Avenue . But when the basement is being turned into living space, solving moisture issues becomes very important. What are we to make of these wingnut results? Liquid-applied waterproofing membranes may come in several grades, with a manufacturers better-quality products guaranteed for greater amounts of hydrostatic head. If adhesives are used to attach an element to the membrane, the adhesive pattern should be installed in small dabs to allow vertical water discharge and reduce the potential for hydrostatic pressures imposed on the waterproofing membrane. The location of the building will inform (1) the amount of drainage provided and (2) the amount of insulation in the assembly. Sealing these generally requires application of elastomeric boots that seal to the housing and to the exterior pipe. The details associated with this section of the BEDG on the WBDG were developed by committee and are intended solely as a means to illustrate general design and construction concepts only. In many cases the exterior faade element, whether it be brick, stone, etc., is carried down to just below grade level to properly transition and protect this sensitive area. Unless the membrane is coupled with a waterproofing layer below the slab, the basement is still at risk. This swelling can be 10 to 15 percent of the thickness of the base material. The sheet is installed so the dimples face the foundation wall, creating an air space between the membrane and the foundation. Thats what Peter set out to learn. Disclaimer, Unified Facilities Guide Specifications (UFGS), Unified Facility Guide Specifications (UFGS), Federal Guide for Green Construction Specifications, Energy-Efficient Products and Technologies. In some cases, the tubes may also be re-injected if leakage persists. Browse companies that make rainscreen drainage mat and view and download their free cad drawing, revit BIM files, specifications and other content relating to . 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. $984.76. Structural Support, Environmental Control, Finish, and Distribution as they relate to the below grade enclosure elements of foundation walls. Abrading & Polishing; Building & Grounds . Special loadings such as blast loads are a design consideration in parking areas under and next to buildings. In the vast majority of cases, residential cases, dampproofing is more than adequate, says Barrett. The sump basin is always capped with a lid that is vapor and air tight. These materials require the presence of moisture to set off a reaction with the concrete. 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. The latter two should not be used as waterproofing except for the most non-critical conditions. Cementitious products are generally portland cement based and typically trowel-applied or brush-applied. This can be handled from the outside (positive side repairs) or from the inside (negative side repairs). In fact, in some situations, conditioned below grade spaces are subjected to a constant inward vapor drive during summer as the interior space is air conditioned, and in the winter the interior space is heated resulting in a lower vapor pressure than the exterior condition as the soil stays relatively constant in terms of vapor pressure. Design process includes proper assumption of structural element [] This high strength non-woven geotextile is designed to protect the drainage composite during and after construction. 5 0 obj Aggregate adds additional weight-bearing to the foundation wall. Other surfaces such as gas pipes, signal or electrical should generally be done with due consideration for the nature of the sleeve through the exterior wall and the depth below grade of the penetration. Negative systems are generally limited to cementitious systems. Flower beds, overhanging decks, nearby neighbors and a variety of other site conditions may make this difficult, and it will be expensive. Minimum thickness of concrete structural elements based on ACI 318-14, IRC 2009, IS 456 2000, and UBC 1997 is presented. Location of the slip plane may vary depending on the design; however, it should be included in all assemblies. Clean surface of loose debris and install Sika Drainage Mat directly on Sikalastic RoofPro and Sikalastic-320 NS/SL membrane with filter fabric side up and membrane protection layer down and in the direction of maximum slope. For example, crystalline waterproofing is often used to provide redundancy to one of the other waterproofing systems. and installing gutters, perimeter drain pipe, a capillary break, and free-draining soils or drainage mat protect the foundation from water saturation. In other cases, more extensive repairs may be needed. 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 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. Asphaltic coatings may be solvent- or water-based. These coatings are typically combined with a fiberglass board insulation that both insulates the wall and protects the waterproofing. Waterproofing sheet membrane the company sells costs roughly $1 a square foot ($180 for a roll that yields about 175 square feet of usable membrane) while a water-based dampproofing costs $300 for a 55-gallon drum, or about 22 cents a square foot. Liquid-applied varieties can be sprayed, rolled or troweled onto the surface, typically to a thickness of 60 mils wet (curing to 40 mils). Revised by the Chairs of the Building Enclosure Councils with assistance from Richard Keleher, AIA, CSI, LEED AP and Kenneth Roko, AIA of The Facade Group, LLC Structural Support, Environmental Control, Finish and Distribution, are expanded below in general terms for foundation walls. Injection ports/sites are typically accessed from the building interior. (51 mm) PVC pipe at 8 ft (2400 mm) on center, allows water on the interior to reach the foundation drain. In many cases the foundation wall is required to resist all of these loads directly with the wall designed as a cantilever retaining wall with a large base footing or as a basement wall spanning vertically between the foundation element and supported floors. Depending on site conditions and depth of the foundation wall, positive side waterproofing can either be installed from the exterior or directly to the lagging in a blind-side application prior to placing concrete. Although marketed to be used with excavated soils during backfill in lieu of a granular drainage layer, it is recommended that a full system approach be used in applications where water leakage is not tolerable; a full system approach should include both a synthetic drainage layer and granular drainage layer. Fluid-applied membranes are applied in liquid form and cure to form one monolithic seamless membrane. Proper design to connect downspouts into perimeter drain systems directly instead of flowing onto the area directly adjacent to the foundation wall is prudent in design. 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). Another way of tackling leaky basement walls is by using a waterproofing coating on the interior. Surcharge loadings may include live loads from pedestrian walkways or from vehicular roadways. WaterWay Rainscreen Drainage Mats: Consists of a polypropylene core of fused, entangled filaments in varying thicknesses from a nominal 1/8 inch to 3/4 inch, depending on desired cavity space and cladding selection. As Stock points out, the solution has to take site conditions into account. Moisture in the soil cause the bentonite to expand, sealing out ground water. The modal window is a 'site map' of the most critical areas of the site. Lateral loads on foundation walls exist from the soil, surcharge and hydrostatic pressure loads. Find Your Sales Rep location_on. 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. 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