In general, using prefabricated composite drainage board directly against certain waterproofing membranes as a protection layer is not recommended. The outlet must be the lowest point in the system at each juncture. With the spray, quality control is always with the guys doing the spraying, Barrett said. Distribution FunctionsFoundation walls may contain distribution systems such as electrical and electronic runs. Originally published on GreenBuildingAdvisor.com. 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. 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. Its always better to try to keep the water out of the system than manage the water once it gets into the system.. If water gets through the dimple sheet, the dampproofing will prevent it from being absorbed by the concrete. x\#}Whl??b ]f7)m*r~?q4 The installation of a properly designed footing drainage system is also recommended. Sika Drainage Mat 1000 is suitable for heavy loads and split slabs exposed to vehicular traffic. Location of the slip plane may vary depending on the design; however, it should be included in all assemblies. 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). 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. 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. Faade terminations often produce the accumulation of moisture at or near the grade line of the building with the surrounding area. Wall expansion joints should be designed to accommodate the anticipated structural movement. Typical hydrostatic and soil pressures generally range from 30 to 62.4 psf per foot of depth. Although a number of other materials also would satisfy IRC requirements for waterproofing, the availability of so many spray-on and peel-and-stick membranes probably makes many of them seem either obsolete or less reliable. Quantity Add to cart PRODUCT SPECS Model: 3611R Weight: 54 lbs Size: 39" wide x 100' long (27" dia.) 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. ArmorDrain 150 Drainage Mat is considered a green product, and can be used toward LEED building credits. There is a combination of environmental design loadings at this interface such as surface water, runoff, and cavity wall drainage. For emerging issues refer to General Overview section. Drainage mat allows for full head-to-footer flow of water.5. Then he filled the hollow cores of the columns with water to see whether the coatings worked. 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. $984.76. This cooling effect combined with general poor air circulation in underground spaces can result in condensation on interior wall surfaces. 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. The core is bonded to a Moisture Resistive Filter Fabric that functions like an additional layer of Weather Resistant Barrier. 3M Holdfast 70 M has been independently evaluated by 3M and Tremco below-grade waterproofing membranes are listed as compatible on their web site. Dimple drainage sheet, drainage membrane, drainage board, cuspated drain mat, drainage mat with dimple, cuspated drain board. Apply 6-mil-thick polyethylene sheeting or a self-adhesive waterproof membrane to the entire exterior side of the below-grade walls before backfilling. The slip plane is between the XPS and the drainage board. In the upper areas of the foundation wall thermal loading considerations must be addressed. Sika Drainage Mat are manufactured articles/finished goods that do not require Safety Data Sheets to be marketed, transported or applied at the jobsite. With bentonite systems, lapping of bentonite sheets is typically backlapped from the exterior if concrete placement involves pouring from the top of the wall. In addition, mechanical attachment of insulation or other materials that would penetrate or place stress on the membrane should be avoided. 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. The modal window is a 'site map' of the most critical areas of the site. 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. But when the basement is being turned into living space, solving moisture issues becomes very important. Gap-grading the sand provides uniform grain size, which accelerates drainage flow rates. Aggregate backfill needs to be trucked to the site and the dirt backfill hauled from the site. One difference is that 16-inch sections of the slab are left intact every 15 to 20 feet to keep the foundation wall stable, as the illustration below shows. It can be applied to a wet wall. Markets. 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. With drainage, both of these procedures are eliminated. Structural Support, Environmental Control, Finish and Distribution, are expanded below in general terms for foundation walls. The junction of concrete foundations and wood framing is prone to air leaks and moisture issues. Isolation, insulation and waterproofing of certain piping that undergoes large temperature changes are often underestimated for resulting movement. The core is perforated, then bonded to a root resistant non-woven polypropylene filter fabric on the top side and nonwoven polypropylene membrane protection fabric on the bottom side. 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. Polyurethane-Methacrylate (PUMA) Technology, TREMproof PUMA for Below-Grade Waterproofing, TREMDrain Fittings and Accessories Data Sheet, TREMDrain Fittings and Accessories Instructions, TREMDrain Series Drainage Application Instructions, TREMDrain Series Drainage Mat App. Despite the fact that dimple mat is impervious to water, its still not considered a waterproofing layer because it is not sealed at the bottom of the wall, says Barrett. If installed, soil pressures can cause the "dimples" in the drainage core to displace or damage the waterproofing membrane. In these cases the remaining part of the system is a dampproofing applied directly to the exterior surface of the foundation wall. Drainage mat allows for full head-to-footer flow of water. Moisture control is dealt with in a multiple screen/barrier type of design approach. Tremco also offers a negative side spot treatment for cracks. The bottom protection fabric provides cushioning for the waterproofing membrane. Portions of the building permanently below the water table may require more redundant systems. 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 can be fitted with outlets and drainage accessories to further move the water away from the structure. Cosella Dorken Products. With drainage, both of these procedures are eliminated.3. Negative systems are generally limited to cementitious systems. 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) Waterstops are manufactured products available in a wide range of configurations and sizes. 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. These systems include metallic (metal oxide), crystalline, chemical additive, and acrylic modified systems. The thickness of these systems varies from 20 to 120 mils. 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. Insulation hangers may be set into wet daubs of Tremco membrane. The use of a Tremco drainage mat provides the following advantages: 1. 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. Who cared? 2023 The Taunton Press, Inc. All rights reserved. Building Product Divisions > 07 - Thermal and Moisture Protection > 07 05 10 - Rainscreen Drainage Mat 07 05 10 - Rainscreen Drainage Mat. See appropriate sections under applicable guide specifications: Unified Facility Guide Specifications (UFGS), VA Guide Specifications, Federal Guide for Green Construction Specifications, MasterSpec. 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. 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. concrete, insulation may only be of importance to moderate interior temperatures in the upper portions of the foundation wall where temperature conditions will fluctuate. 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. The heat fuses layers together and overcomes some of the shortcomings of self-adhering membranes by providing complete coverage of joints and other details. Perimeter drains of 4-inch Schedule 40 PVC covered with coarse gravel or septic rock in filter fabric completes the installation. Graded pea gravel refers to naturally rounded stone between 3/16 inch and 3/8 inch in diameter. Basic Uses TREMDrain NW is ideal for vertical walls less than 20 feet. Roll size: 4 X 50 200 sq. In all cases, installing a perimeter drain below the level of the basement floor is essential. Imperfections in the sprayed coat are repaired or filled with the sealant (Risinger recommends Poly Wall 2200). The Glen-Gery Drainage Mat is an all-wall engineered rain screen drainage and ventilation mat for all sidewall applications including manufactured brick and stone. Approved materials include bituminous coatings (asphalt that has been diluted with solvents) acrylic modified cement, or surface-bonding cement. The plastic composite "dimpled" drainage cores are available in various configurations and are typically constructed using polypropylene, polystyrene and polyethylene. Floor Slab Schematic. In other cases, more extensive repairs may be needed. The location of the building will inform (1) the amount of drainage provided and (2) the amount of insulation in the assembly. Many waterproofing membranes need to be shielded from ultraviolet radiation to prevent deterioration and as such some type of exterior finish is required. Innovative Solutions for the Built Environment When it is wrapped over masonry ledges, care must be taken to coordinate with masonry ties and thru-wall flashings. 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). Insulation Project Guide. The entry level of good performance, as Straube puts it, would consist of a drainage membrane like dimple map plus a perimeter drain at the base of the wall. The drain board protects the waterproofing layer while relieving hydrostatic pressure. Backfilling should commence as soon as possible after installation of the drainage mat. 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 . Extruded polystyrene insulation boards should be properly supported on the footing to prevent vertical movement. Sheet-Membrane SystemsSheet membranes used in foundation wall applications include thermoplastics, vulcanized rubbers, and rubberized asphalts. Soil loadings vary with soil type and whether soil is treated as active or passive. % 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. It happens when water gets inside the concrete (or brick or stone) and then pushes it outward. Styrene-butadiene rubber compounds cure to a flexible, rubbery consistency. Other materials sometimes used as protection layers are extruded polystyrene rigid board insulation or prefabricated synthetic drainage layers. Understanding the specific chemical admixture is important in determining its potential performance in below-grade dampproofing or waterproofing applications. A variety of sheet- and liquid-applied membranes can be used, all designed to resist the hydrostatic pressure of ground water. 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. 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. An interior drainage layersuch as dimple mat or sheet waterproofing membranecan be added. These are EnkaDrain foundation drainage mats. The first and most effective defense against this water is to slope the upper screen surface away from the building a minimum of 5% near the building edge. In general, the manufacturer's standard details should be followed. 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. Coarse sands varying from No. The most commonly used protection board is a semi-flexible sheet containing an asphalt core placed between asphalt impregnated glass fiber mats. Drainage board can be used to protect a dampproofing or waterproofing layer but its not designed as a stand-alone product, Barrett says. 8 sieve are suitable. 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. With fluid membrane systems, proper application in terms of coverage and thickness is critical to performance, and this should be monitored throughout the installation. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page. 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. 1090 Vermont Avenue, NW, Suite 700 | Washington, DC 20005-4950 | (202) 289-7800 Mat Type; Drainage: Interlocking: Traction: Antifatigue . The water flow rate is equal to or better than the aggregate backfill. 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. 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. Why one over the other? 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. Figure 2 is an overall schematic that characterizes the four functions i.e. The Foundation Protection System that Keeps Basements Dry Protecting your foundations from water and moisture is critical. 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. Xypex balked at Peters test method, arguing that CMU blocks differ too much in composition to allow a reliable seal. Full compliance with manufacturers' recommendations and recognized industry standards is recommended, and should be reflected in the appropriate sections of the project specifications. Trusted, comprehensive guidance from the pros for a home that is healthy, comfortable, and energy efficient. Waterproofing Systems. HYDRODUCT 220 is a strong, preformed 0.44 in. endobj endstream In general, when properly designed, non-woven products have good filtration and separation properties. Use the nonwoven filter fabric with soil, sand or stone ballast; use the woven filter fabric with freshly placed concrete or grout. The code permits a variety of waterproofing materials (even rolled roofing), but the most common for residential work are probably liquid-applied and peel-and-stick sheet membranes. . Blind-side waterproofing systems are pre-applied to the area where the concrete element will be placed that is directly exposed to moisture. Common practice for wall terminations or door entries is to provide slope away from the building as previously indicated. Contents: [ show] Components and Working of Foundation Drain On interior wall surfaces living space, solving moisture issues cooling effect combined with general poor circulation... 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Synthetic drainage layers blocks differ too much in composition to allow a reliable seal Resistant Barrier flow rate is to., insulation and waterproofing of certain piping that undergoes large temperature changes are often underestimated for resulting.... Other materials sometimes used as protection layers are extruded polystyrene insulation boards should be.! Brick or stone ballast ; use the woven filter fabric that functions like an additional layer of Weather Resistant.!