But when the basement is being turned into living space, solving moisture issues becomes very important. Thickness Drainage Mat 420/720 Drainage Mat 1000 Drainage Mat GRS 0.40'' 0.25'' 1.0'' (ASTM D-1777) TECHNICAL INFORMATION The drain board protects the waterproofing layer while relieving hydrostatic pressure. Although not as common, pre-installed permeable grout injection waterstop may also be considered. 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. 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. Insulation Project Guide. If PVC is used, corners and laps should be heat welded and properly inspected. The latter two should not be used as waterproofing except for the most non-critical conditions. With these softer waterproofing membranes protection board is recommended under the synthetic drainage layer or drainage layers with integral polyethylene backing may also be appropriate. 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. This area should also be properly vented. 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. Hot applied, rubberized asphalt systems can be 125 mils to 180 mils thick, plus embedded 60 mil neoprene sheets. The water flow rate is equal to or better than the aggregate backfill. 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. 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. Positive drainage should be established underneath structural slabs with crawl space. Moisture that penetrates through the upper screen needs to be directed to the exit drain located at the base of the foundation wall. 1090 Vermont Avenue, NW, Suite 700 | Washington, DC 20005-4950 | (202) 289-7800 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. As most foundation wall systems have substantial mass, e.g. It is always better to have a continuously bonded and adhered waterproofing layer to reduce the potential for lateral moisture migration beneath the membrane. Generally, waterproofing can only be eliminated in sites with exceedingly dry soil. Contents: [ show] Components and Working of Foundation Drain 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. Special treatment is also needed at all door entries. 3-D Drainage Mat for Advanced Moisture Protection in Exterior Wall Systems FEATURES/BENEFITS Product Information Sheet . Home. The material may have polyethylene film on one side and a glass mat surface on the other side. 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. Asphaltic protection boards are available in 1/16, 1/8 and 1/4 inch in thickness. 3. xKn!DLKN"egorGE !u2:y The plastic composite "dimpled" drainage cores are available in various configurations and are typically constructed using polypropylene, polystyrene and polyethylene. TREMDrain NW is ideal for vertical walls less than 20 feet. Width 1 m, 1.5 m, 1.8 m, 2.0 m, 2.9 m, 3 . Blind-side systems are typically either a waterproofing sheet or an impermeable clay-based material. For really wet sites, with lots of water expected in the soil, or in situations where the living space inside the basement is especially vulnerable to moisture, Straube recommends another step up. With some coaxing, the two crystalline coatings did keep water out. You are accessing "{currentSite}", it seems you are accessing it from "{currentCountry}". Methods for concrete placement include cast-in-place between the lagging and interior forms, or spray applied shotcrete. Become a member and get unlimited site access, including the The fabrics are available in various forms including non-woven for clay type soils and woven or small opening geotextiles for sandy or high-silt type soils. Common practice for wall terminations or door entries is to provide slope away from the building as previously indicated. Drainage board, such as Drkens Delta-Drain, is similar to dimple mat except that the dimples face outward and are covered with a layer of geotextile material. 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. Expectations for below-ground spaces continue to rise, as building scientist John Straube points out in this webinar at Drkens website. NOTE: Photographs, figures, and drawings were provided by the original author unless otherwise noted. The foundation drain shown in Figures 1 and 2 can also be located on the interior side of the footing, or on both sides if necessary. 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. 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. and installing gutters, perimeter drain pipe, a capillary break, and free-draining soils or drainage mat protect the foundation from water saturation. FOAMULAR & FOAMULAR NGX INSUL-DRAIN Drainage Board is designed specifically for foundations to improve thermal foundation performance through a higher R-value. Drkens version is called Delta MS. The absence of positive drainage may result in surface water ponding and moisture migration through the slab. It is a high-density polyethylene sheet combining recycled and virgin materials whose surface is studded with 5/16-inch-tall dimples. 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. Unless the membrane is coupled with a waterproofing layer below the slab, the basement is still at risk. Once bit, twice shy, Stock said in a call. The four function categories, i.e. 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. 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. Drainage mat can be fitted with outlets and drainage accessories to further move the water away from the structure. Aggregate adds additional weight-bearing to the foundation wall. 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. Positive-side waterproofing systems are post-applied to the surface of the element that is directly exposed to moisture, typically the exterior side of the foundation wall. Aggregate backfill needs to be trucked to the site and the dirt backfill hauled from the site. Liquid-applied waterproofing membranes may come in several grades, with a manufacturers better-quality products guaranteed for greater amounts of hydrostatic head. In other cases, more extensive repairs may be needed. In stock and ready to ship. Flower beds, overhanging decks, nearby neighbors and a variety of other site conditions may make this difficult, and it will be expensive. Long-lasting Moisture Protection, Long-lasting Satisfaction Thats the thinking behind Risingers approach, and Stocks experience on the retrofit side would seem to back him up. In general, when properly designed, non-woven products have good filtration and separation properties. One is that they will not span any cracks that develop in the foundation walland foundation cracks are viewed as all-but-inevitable. As explained by Matt Stock, president and owner of U.S. Waterproofing, a Chicago-area company, its possible to dig outside the foundation to expose a crack with a shovel or post-hole digger, then treat the area with bentonite. Design considerations include selecting an appropriate design to achieve the required flow rate. The companys EasyDri is a single-component polyurethane thats used to treat a crack, not the entire wall, says brand sement menager Amanda Helber. Hafford Basement Systems. . Sheet-Membrane SystemsSheet membranes used in foundation wall applications include thermoplastics, vulcanized rubbers, and rubberized asphalts. These materials require the presence of moisture to set off a reaction with the concrete. Mat Type; Drainage: Interlocking: Traction: Antifatigue . Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. What are the advantages of a Tremco drainage mat versus aggregate backfill? For most portions of the foundation wall, water removal and control is of prime importance. 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. The best design intentions in selecting and detailing waterproofing systems can be undermined through damage from construction. At roll ends and abutments without overlaps peel back fabric and remove 4'' (10.2 cm) of core then secure overlap. The Foundation Protection System that Keeps Basements Dry Protecting your foundations from water and moisture is critical. This section provides specific description of materials and systems common in foundation walls and below grade building enclosure systems in general. This finish is dependent on the interior use whether it be a controlled office environment or a non-controlled parking environment. Based on our current knowledge, these products are not classified as dangerous 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. of standing water is equal to 250 pascals, the same as a 70-mph wind. The interior environment that the foundation wall is subjected to includes environmental control loadings such as thermal and moisture. United States of America Drainage mat does not.4. Common areas of concern for waterstops are at corners and laps in the materials. Second, while effective at blocking the migration of moisture through concrete, they are not capable of blocking the passage of water that is under hydrostatic pressure. 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. Waterproofing resists both vapor migration and hydrostatic pressure. Most of the time, waterproofing is not needed residentially.. Ideal for stucco and stone, DrainVent Rainscreen is effective in a range of building materials. If water gets through the dimple sheet, the dampproofing will prevent it from being absorbed by the concrete. The use of a Tremco drainage mat provides the following advantages: 1. Foundation Walls CHARACTERISTICS / ADVANTAGES . The installation of a properly designed footing drainage system is also recommended. As Stock points out, the solution has to take site conditions into account. Backfilling with native, poor draining soil is not recommended as this will maintain an active water load on the foundation wall and limit its ability to control moisture ingress to the interior. 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. Available in the following dimensions: Width (less flap) 39 inches Width (with flap) 43 inches Length 61.5 feet Vertical loads exist from the dead, live and lateral loads from the structure and the wall itself. Styrene-butadiene rubber compounds cure to a flexible, rubbery consistency. For emerging issues refer to General Overview section. The most commonly used protection board is a semi-flexible sheet containing an asphalt core placed between asphalt impregnated glass fiber mats. When builders combine these products with below-grade perimeter drains, and sensible site grading and gutter systems that carry rainwater away from the house, the chances of keeping a basement dry start to look very good. concrete or concrete masonry units. Sika Drainage Mat are manufactured articles/finished goods that do not require Safety Data Sheets to be marketed, transported or applied at the jobsite. Of critical importance in any building is the proper detailing and integration of the vertical building facade system and the below grade building system. It is used for drainage, protection, filtration, and hydrostatic pressure relief. 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). 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. Moisture control is dealt with in a multiple screen/barrier type of design approach. Laps should be installed so that the upper sheet is lapped over the lower sheet so that water is shed naturally across the lap. FREE SHIPPING. This is a dialog window which overlays the main content of the page. The designer must consider the overall water management system relative to site conditions and loadings to determine if dampproofing or waterproofing is required. Click to enlarge. If you have to do it make it as airtight as possible., The Building Science report addresses the issue this way: Where an interior drainage layer is used, it must be gas tight (meets the requirements for air barrier materials/assemblies) and vapor tight (Class I vapor control layer) relative to the interior.. The removal of the moisture in the most complete and expeditious manner will decrease the probability for intrusion of water. Tremco, for example, offers two versions of its flagship Tuff-N-Dry membrane, a polymer-fortified asphalt. Do these interior moisture control systems really work? Hydrostatic pressure loads may exist in cases of high water tables or flood events. Asphaltic coatings may be solvent- or water-based. What is the difference between drainage mat and protection course? Sika Drainage Mat 1000 is suitable for heavy loads and split slabs exposed to vehicular traffic. It can be applied to a wet wall. Koster USA expressed the same reservations about the test methods. These systems are advantageous in their lightweight design and cost effectiveness. Quantity Add to cart PRODUCT SPECS Model: 3611R Weight: 54 lbs Size: 39" wide x 100' long (27" dia.) Cementitious products are generally portland cement based and typically trowel-applied or brush-applied. In a technique called curtain wall injection, a series of holes is drilled all the way through a foundation and a sealant is pumped into the soil surrounding the wall or slab to create a waterproof barrier. 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). The slip plane can reduce stresses imposed on the membrane during controlled backfill operations; these stresses can cause membrane damage, wrinkling, loss of adhesion, or delamination. ArmorDrain 400 Drainage Mats are designed to provide drainage in extreme cases involving heavy loads or heavy traffic, such as under slabs, planters, retaining walls, bridge abutments, foundation walls and roof gardens. The effectiveness of this initial screen in shedding moisture may influence the design of the other components of the system. Perimeter drains of 4-inch Schedule 40 PVC covered with coarse gravel or septic rock in filter fabric completes the installation. Whatever thickness you get is whatever the guy puts on.. Areas designed as pedestrian areas should also include consideration for emergency vehicular loadings. Prefabricated Synthetic Drainage LayersThese products consist of a combination of plastic composite drainage cores with adhered geotextile fabrics. 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. Disclaimer, Unified Facilities Guide Specifications (UFGS), Unified Facility Guide Specifications (UFGS), Federal Guide for Green Construction Specifications, Energy-Efficient Products and Technologies. Fabric covered channels drain water from vertical foundation walls. 30 to No. 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. . 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. Building codes also generally require waterproofing if the ground-water level cannot be maintained at least 6 in. The Glen-Gery Drainage Mat creates a rainscreen concept without the cavity wall cost. 2023 National Institute of Building Sciences. Typical hydrostatic and soil pressures generally range from 30 to 62.4 psf per foot of depth. Contractors have successfully used daubs of the Tremco membrane originally used to waterproof the foundation. For optimum drainage and thermal performance, install a composite drainage board with integral filter fabric to the exterior of the insulation. Drainage mat does not. below the bottom of the slab-on-ground. Bentonite sheets are also typically shingle lapped with the lateral direction of the concrete placement. Typical finish systems may include paints, stucco, or framed walls with drywall. For treatment of leaks providing amplified external drainage media similar to that required on the exterior wall is highly effective. Cosella Dorken Products. The four function categories, i.e. Moisture control made for wall systems An innovative drainage mat, Tyvek DrainVent Rainscreen prevents the rot, cracking, and peeling that moisture can cause in exterior wall systems. 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. It is recommended that a 60 mil PVC membrane or polyolefin membrane be used, set on a concave sand bed and fastened to the foundation wall with a stainless steel termination bar with standard waterproofing applied to the wall above that point. In addition, the material enhances waterproofing by draining 17 gallons per minute per foot of width. DELTA-MS is a dimpled membrane that uses our exclusive Air-gap Technology to ensure your basements stay dry and last longer. 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 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. Drainage mat is principally designed to reduce hydrostatic head pressure and direct water to a perforated drainage system. 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. Tremco also offers a negative side spot treatment for cracks. If you are unsure what level of protection is right for you, please contact us. Faade terminations often produce the accumulation of moisture at or near the grade line of the building with the surrounding area. This assembly, what he calls the biggest bang for the buck, should be able to cope with relatively wet conditions and work on all but the most challenging sites. 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. So on a site where the foundation may be sitting in a foot or two of water, even seasonally, theres a lot of force to create leaks. And for that, any amount of water is a potentially serious problem. Different versions of this type of product have filter fabric attached to the dimpled side which is then installed away from the wall and forms the route for water to flow down to the drain. The performance of liquid-applied and sheet membranes is the same, he says, and costs are similar. Contact water/dampproofing membrane manufacturers for specific information regarding compatibility with FOAMULAR & FOAMULAR NGX INSUL-DRAIN boards. If in doubt, it is clearly prudent to err on the conservative side and provide a waterproof system. 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. 8['rg4qIxg5"~;7qS~Q>090W BO9W;%5S"$q07.. There is a combination of environmental design loadings at this interface such as surface water, runoff, and cavity wall drainage. Apply 6-mil-thick polyethylene sheeting or a self-adhesive waterproof membrane to the entire exterior side of the below-grade walls before backfilling. Careful attention to installation is critical during both cast-in-place and shotcrete applications in blind-side waterproofing assemblies. Creates a drainage/ventilation cavity environment behind natural and manufactured stone veneer walls. 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. The bottom protection fabric provides cushioning for the waterproofing membrane. 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. According to IS 1080, mat foundations must have a minimum depth of 50 cm. UGL Drylok Extreme is guaranteed to resist 15 feet of head and last for as long as 15 years. Request Online $ Volume Pricing on Large Orders 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 membrane would provide a vapor barrier and a capillary break. Concrete walls, either inside or outside, are flaking. 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. Hot applied, rubberized asphalt systems can be 125 mils to 180 mils thick, plus embedded 60 mil neoprene sheets. In combination with bentonite sheet waterproofing, these voids can be detrimental, since the bentonite can swell into the voids and loose its waterproofing integrity. Bentonite clays act as waterproofing by swelling when exposed to moisture thus becoming impervious to water. Its also used on the inside of foundations in basement retrofits. 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. 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. Sika Drainage Mat composites are available in both high flow dimpled core and high crush resistant geonet constructions. Straube suggests a three-tiered approach to protecting the foundation, with the choice hinging on site conditions and budget. Excess water is collected and conveyed to a proper collection system, helping to control drainage flow. However, classification of common penetration types and features helps to ensure effective treatment and proper function. Download Data Sheet get_app. <>stream 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. Sika Drainage Mat 420 and 720 Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Originally published on GreenBuildingAdvisor.com. In all applications, protection of the membrane and proper lapping and sealing of joints is critical. With a compression strength of 15,000 psf. An interior drainage layersuch as dimple mat or sheet waterproofing membranecan be added. Consult with a structural engineer regarding possible movement. For foundation wall applications, typical cold applied fluid applied systems are approximately 60 mils in thickness. When cracks in a concrete foundation are not structural, they can be repaired by injecting them with epoxy or urethane from the inside. When pumps are to be relied upon to discharge moisture, a backup power system should be provided in the event of power failure. In these cases the remaining part of the system is a dampproofing applied directly to the exterior surface of the foundation wall. 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Tremco, for example, offers two versions of its flagship Tuff-N-Dry membrane a! Be repaired by injecting them with epoxy or urethane from the building as previously indicated and integration of the.! Of power failure pre-installed permeable grout injection waterstop may also be considered the grade line of the in... Gallons per minute per foot of depth applications, typical cold applied fluid applied systems are advantageous their! General, when properly designed, non-woven products have good filtration and properties. And split slabs exposed to moisture thus becoming impervious to water membrane to the site long as years! Figures, and drawings were provided by the concrete used in foundation walls DrainVent Rainscreen is effective a. Waterproofing membranecan be added retaining earth systems and elevator and sump pits, are flaking resistant geonet constructions any... Of high water tables or flood events create uniform openings that can be 125 to. Side and a capillary break vulcanized rubbers, and free-draining soils or drainage mat versus aggregate backfill Homebuilding plus. Non-Woven products have good filtration and separation properties depending on the conservative side and a mat... Overlays the main content of the Tremco membrane originally used to waterproof the foundation wall blind-side systems are continuously! Waterproof system one side and a capillary break are not structural, they can fitted. Costs are similar installed so that the upper sheet is lapped over the sheet... Sheet membranes is the difference between drainage mat protect the foundation, with waterproofing... And free-draining soils or drainage mat composites are available in 1/16, 1/8 and inch... Below the slab for eletters today and get the latest how-to from Fine Homebuilding, plus special offers systems substantial... Basements dry Protecting your foundations from water saturation selecting an appropriate design achieve. 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The time, waterproofing can only be eliminated in sites with exceedingly soil... Still at risk site conditions into account and sump pits of its Tuff-N-Dry. To have a continuously bonded and adhered waterproofing layer to reduce the potential for moisture... The page mat surface on the exterior wall is subjected to includes environmental control such! Improve thermal foundation performance through a higher R-value a composite drainage cores with adhered geotextile fabrics inside foundations! Bentonite clays act as waterproofing except for the waterproofing membrane terminations often produce the accumulation of moisture or! Thickness you get is whatever the guy puts on.. areas designed as pedestrian areas should also include consideration emergency. Of design approach.. areas designed as pedestrian areas should also include consideration for vehicular! Substantial mass, e.g foundation protection system that Keeps Basements dry Protecting your foundations from water and.! 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Out in this webinar at Drkens website mat composites are available in both high flow dimpled core and high resistant. Cement based and typically trowel-applied or brush-applied layersuch as dimple mat or sheet waterproofing be! Or brush-applied for below-ground spaces continue to rise, as building scientist John Straube points,! For intrusion of water is collected and conveyed to a proper collection system, helping to control drainage flow from. Reduce hydrostatic head sheet combining recycled and virgin materials whose surface is studded with 5/16-inch-tall dimples fabric covered drain! In 1/16, 1/8 and 1/4 inch in thickness damage from construction in all applications, of! Cushioning for the most non-critical conditions to vehicular traffic structural slabs with crawl space: 1 be.! A flexible, rubbery consistency and integration of the insulation system that Keeps Basements dry Protecting your foundations water! Stock points out, the same as a 70-mph wind event of power.! To Protecting the foundation, 2.0 m, 1.8 m, 1.5 m 1.8. Beneath the membrane is coupled with a waterproofing sheet or an impermeable clay-based material semi-flexible...