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) membrane at the foundation wall in addition to FOAMULAR & FOAMULAR NGX INSUL-DRAIN board. With enough of a hydrostatic head, water will be forced up through the slab even if the walls are watertight. No one size fits all, he said in a telephone call. It happens when water gets inside the concrete (or brick or stone) and then pushes it outward. EnkaDrain 3811 is made of a drainage core of fused, entangled polypropylene filaments and a geocomposite fabric bonded to each side. In some cases, the tubes may also be re-injected if leakage persists. This excess moisture might be due to flooding or some other reason. Structural Support Functions The floor slab of the below grade building enclosure must be designed to carry downward vertical gravity loadings as well as . Drainage mat can be fitted with outlets and drainage accessories to further move the water away from the structure. A little bit of water might get through at a puncture or nail hole, but a little water shouldnt be a problem. The water flow rate is equal to or better than the aggregate backfill. According to the Concrete Network, liquid-applied membranes go on quickly, and are relatively low in cost. The polymer core mesh creates the airspace, while the lighter fabric prevents mortar from seeping into the newly formed cavity. Green Roof Drainage Mat - EnkaDrain 3811. ft/roll 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. With the spray, quality control is always with the guys doing the spraying, Barrett said. Extruded polystyrene insulation boards should be properly supported on the footing to prevent vertical movement. 4. 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. Cementitious products are generally portland cement based and typically trowel-applied or brush-applied. However, the use and location of the insulation is more important on the control of moisture in terms of preventing condensation on interior wall faces for the entire height of the foundation wall. 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. With bentonite systems, lapping of bentonite sheets is typically backlapped from the exterior if concrete placement involves pouring from the top of the wall. See appropriate sections under applicable guide specifications: Unified Facility Guide Specifications (UFGS), VA Guide Specifications, Federal Guide for Green Construction Specifications, MasterSpec. 9 0 obj Drainage boards cover the foundation from the ground level to the top of the footing. This swelling can be 10 to 15 percent of the thickness of the base material. 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. Areas designed as pedestrian areas should also include consideration for emergency vehicular loadings. 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 Although liquid-applied membranes are seamless, their potential weakness is inconsistent application resulting in uneven thickness on the concrete. Special loadings such as blast loads are a design consideration in parking areas under and next to buildings. Request Online $ Volume Pricing on Large Orders 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. Insulation hangers may be set into wet daubs of Tremco membrane. Blind-side systems are typically either a waterproofing sheet or an impermeable clay-based material. 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. 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. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Hydrostatic pressure loads may exist in cases of high water tables or flood events. Aggregate adds additional weight-bearing to the foundation wall. Unless the membrane is coupled with a waterproofing layer below the slab, the basement is still at risk. Do these interior moisture control systems really work? Bentonite panels are still common on commercial waterproofing jobs, says Geiger, and remain popular with some architects and builders. A rising water table can push moisture up behind the membrane at the footing. Some but not all sheet membranes are applied over a primer, and manufacturers offer versions that can be applied in temperatures as low as 0F. Tremcos HDPE/Bentonite is typical of these products. This site is protected by reCAPTCHA and the Google. Waterstops are manufactured products available in a wide range of configurations and sizes. Vertical loads exist from the dead, live and lateral loads from the structure and the wall itself. 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. 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. The use of a Tremco drainage mat provides the following advantages: 1. Styrene-butadiene rubber compounds cure to a flexible, rubbery consistency. endobj First, lets keep in mind that Peter would be the last person to claim lab-like precision with his testing. It combines bentonite and a high-density polyethylene sheet that is installed on the outside of the foundation before backfilling. (51 mm) PVC pipe at 8 ft (2400 mm) on center, allows water on the interior to reach the foundation drain. Aggregate backfill needs to be trucked to the site and the dirt backfill hauled from the site. Attach mat to membrane surface with Sikaflex 11FC or approved adhesive as necessary to keep in position. With a compression strength of 15,000 psf. Asphaltic coatings may be solvent- or water-based. 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. What is the minimum thickness of mat foundation? If in doubt, it is clearly prudent to err on the conservative side and provide a waterproof system. You are accessing "{currentSite}", it seems you are accessing it from "{currentCountry}". Drainage mat does not.4. Whether they are as reliable as waterproofing on the foundation exterior is another question. These systems are advantageous in their lightweight design and cost effectiveness. 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. 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 affable pitchman stands beneath an oversized umbrella and promotes a business devoted to all things basementy. Hafford is one of hundreds, maybe thousands, of specialists around the country who have made careers out of rehabbing wet, moldy basements and crawlspaces. 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. The location of the building will inform (1) the amount of drainage provided and (2) the amount of insulation in the assembly. Some systems include reinforcing mesh embedded into the liquid. The sheet is installed so the dimples face the foundation wall, creating an air space between the membrane and the foundation. After spraying on a 60-mil layer of styrene-butadiene rubber, Risinger explains in this article in the Journal of Light Construction, he adds a heavy bead of sealant at the cold joint between the wall and the footing. And for that, any amount of water is a potentially serious problem. Imperfections in the sprayed coat are repaired or filled with the sealant (Risinger recommends Poly Wall 2200). For treatment of leaks providing amplified external drainage media similar to that required on the exterior wall is highly effective. This can be accomplished with pumping systems. Manufacturers of Rainscreen Drainage Mat. 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. Wall expansion joints should be designed to accommodate the anticipated structural movement. fax +1 (201) 804 1076. Early morning TV viewers in Portland, Maine, sooner or later will meet Tony Hafford, founder of T.C. When Peter tried plugging an active leak with Drylok Fast Plug hydraulic cement, the column continued leaking, including right at the plug. FOAMULAR INSUL-DRAIN. 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 drainage board should have the protection sheet on the backside of the core to promote better movement against the insulation. Download Data Sheet get_app. Because of the unique nature of penetrations and Special Features, no single rule or criteria can govern or apply to the effective treatment thereof. (This assembly looks a lot like an above-grade rainscreen wall, with the dimple mat taking the place of exterior cladding, and the dampproofing filling the role of a water-resistive barrier.). Some municipalities also limit pumping of groundwater as this can lower groundwater levels and affect the support of adjacent structures. A second level of performance would include a dampproofing layer (sprayed on asphaltic emulsion, for example), plus a drainage membrane like dimple mat, and drainage at the base of the wall. Construction joints have been effectively treated in most applications by a waterstop manufacturer's recommended details. FREE SHIPPING. 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. Alternately, hell use a peel-and-stick membrane 40 mils thick over a primer. 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. In general, the manufacturer's standard details should be followed. 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. The H8 version will handle 8 feet of head while the XTS, used in both residential and light commercial work, will resist 12 ft. of hydrostatic head, according to the company. 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. If you are unsure what level of protection is right for you, please contact us. The foundation wall of a building may be a cast-in-place concrete retaining or basement wall or a structural wall complete with load-bearing pilasters. 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. Figure 2 is an overall schematic that characterizes the four functions i.e. If the exterior wall materials will not protect the waterproofing at grade, base flashings should be used to protect the waterproofing from ultraviolet (UV) radiation exposure. 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. Then he filled the hollow cores of the columns with water to see whether the coatings worked. 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. 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. 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. Moisture in the soil cause the bentonite to expand, sealing out ground water. Drainage pipe should have a slope of at least 0.5%, but preferably 1.0%. 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. 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. The best design intentions in selecting and detailing waterproofing systems can be undermined through damage from construction. In many applications the interior finish is simply the interior surface of the material used for the foundation wall, i.e. Ideal for stucco and stone, DrainVent Rainscreen is effective in a range of building materials. Simple dampproofing materials like asphaltic foundation coatings have two drawbacks. Snow adds: These systems, however, require application by skilled installers and can be quite dangerous.. But, he adds, just as water makes the bentonite swell, a lack of water makes the panels shrink. 3-D Drainage Mat for Advanced Moisture Protection in Exterior Wall Systems FEATURES/BENEFITS Product Information Sheet . In other cases, more extensive repairs may be needed. National Institute of Building Sciences 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. Hydrostatic pressure can push the coating off the wall. Originally published on GreenBuildingAdvisor.com. As described by Snow in an article he wrote for The Journal of Architectural Coatings, these membranes are made from styrene-butadiene-styrene modified bitumen and require the use of a torch to melt the backing and soften the bitumen. The higher soil temperatures on the exterior also create the need to provide at least a damproofing on the exterior of the foundation wall to resist the strong interior vapor drive. But when the basement is being turned into living space, solving moisture issues becomes very important. 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. Building codes also generally require waterproofing if the ground-water level cannot be maintained at least 6 in. The key advantage to fluid systems is their monolithic nature and self-flashing abilities as the material is applied in liquid form. This section provides specific description of materials and systems common in foundation walls and below grade building enclosure systems in general. One is that they will not span any cracks that develop in the foundation walland foundation cracks are viewed as all-but-inevitable. A few thousand bucks up front on a site where conditions are questionable seems like good insurance. Although the composite board may have a polyethylene sheet on the membrane-side, this sheet is often cut, damaged, or missing. The heavy fabric prevents rocks and dirt coming entering the drainage channels. Combining different moisture control layers is popular with a number of builders. Diligent inspection and repair of the waterproofing after reinforcing steel is placed is a critical step, as steel placement often results in damage to the waterproofing that can not be repaired once concrete is placed. 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. The outlet must be the lowest point in the system at each juncture. For waterproof systems the first consideration is whether to use positive or negative side waterproofing. Sika Drainage Mat 1000 is suitable for heavy loads and split slabs exposed to vehicular traffic. This area should also be properly vented. Finish FunctionsTwo areas of finishes are of importance in relation to foundation walls. These materials can be solvent based or water emulsions. and installing gutters, perimeter drain pipe, a capillary break, and free-draining soils or drainage mat protect the foundation from water saturation. Insulation materials used in below grade enclosure applications are primarily limited to rigid extruded polystyrene board due to the need for high compressive strength and moisture absorption resistance. TREMDrain 1000 NW is used with TREMproof and Paraseal waterproofing membranes serving both as a protection course and replacement for traditional pipe and stone drainage systems. Structural Support, Environmental Control, Finish, and Distribution, are expanded in general terms for floor slab systems. Other materials sometimes used as protection layers are extruded polystyrene rigid board insulation or prefabricated synthetic drainage layers. The installation of a properly designed footing drainage system is also recommended. These are EnkaDrain foundation drainage mats. For uneven rubble foundations, a layer of spray foam insulation can be applied over the waterproofing membrane, as the illustration below shows. The first area is the finishes of the interior space. The material may have polyethylene film on one side and a glass mat surface on the other side. Penetrations can also become quite exotic such as steam penetrations or other features that require special treatment. Even these systems should only be considered for use as a secondary (back-up) waterproofing to a positive-side waterproofing system, unless they are used with special details provided by a waterproofing expert which are beyond the scope of what are usually provided by system manufacturers. Faade terminations often produce the accumulation of moisture at or near the grade line of the building with the surrounding area. For resources including texts, guides, and web pages refer to General Overview section. This can be handled from the outside (positive side repairs) or from the inside (negative side repairs). 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. 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. 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. Common materials include polyvinyl chloride (PVC), neoprene, expanding sodium bentonite and thermoplastic rubber. Sika Drainage Mat composites are available in both high flow dimpled core and high crush resistant geonet constructions. Assisting were Judd Peterson of Judd Allen Group and David Young, P.Eng., P.E. The Glen-Gery Drainage Mat creates a rainscreen concept without the cavity wall cost. Gap-grading the sand provides uniform grain size, which accelerates drainage flow rates. Tremco, for example, offers two versions of its flagship Tuff-N-Dry membrane, a polymer-fortified asphalt. The performance of the foundation wall system depends on its ability to control, regulate and/or moderate these environmental control loadings on each side of the foundation wall to desired levels. An option used less frequently is a thermofusible membrane. Special treatment is also needed at all door entries. For foundation wall applications, typical cold applied fluid applied systems are approximately 60 mils in thickness. Disclaimer, Unified Facilities Guide Specifications (UFGS), Unified Facility Guide Specifications (UFGS), Federal Guide for Green Construction Specifications, Energy-Efficient Products and Technologies. At times these systems are run internally in the interior surface finish system or in ceiling space. 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. 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. These systems provide a secondary barrier to the passage of water across these construction joints. Graded pea gravel refers to naturally rounded stone between 3/16 inch and 3/8 inch in diameter. Most building codes require dampproofing as a minimum amount of moisture protection. 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. Waterproofing resists both vapor migration and hydrostatic pressure. Contents: [ show] Components and Working of Foundation Drain 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. 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. Its also used on the inside of foundations in basement retrofits. Insulation Project Guide. Waterproofing membrane systems are available as either post-applied or pre-applied products for use in either positive-side, negative-side, or blind-side applications. Cosella Dorken Products. 5 0 obj If installed, soil pressures can cause the "dimples" in the drainage core to displace or damage the waterproofing membrane. 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. 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. Expert advice may also be necessary when dealing with field conditions. Start your subscription today and save up to 70%. Bentonite is, therefore, most effective when properly confined so the product can swell to fill voids and so that it cannot be washed away. These materials require the presence of moisture to set off a reaction with the concrete. The key question that remains is whether to provide dampproofing or waterproofing to the surface of the foundation wall or not at all. As building scientist Joseph Lstiburek explains in this online video, water can exert a lot of force: The pressure of just 1 in. In some situations, it may not be possible to apply waterproofing directly and entirely to the foundation walls, and it may be necessary to fasten a "lens" membrane to the foundation wall to catch runoff and redirect it away from the foundation. 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. 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. Dimple mat is approved as a stand-alone productit can be used to satisfy code-required dampproofing (this is not the case in Canada, however, where a drainage layer also is required). The core is installed dimpled side down to allow water retention within the cups. All core joints and terminations must be covered by fabric overlay. Fabric covered channels drain water from vertical foundation walls. Fluid-applied membranes are applied in liquid form and cure to form one monolithic seamless membrane. 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. Drainage mat allows for full head-to-footer flow of water. The manual also recommends an expanding waterstop made of bentonite over a capillary break between the footing and the foundation wall. Typically constructed with flexible PVC, permeable grout injection tubes are installed in construction joints and are injected with grout only if leakage is observed. 8['rg4qIxg5"~;7qS~Q>090W
BO9W;%5S"$q07.. Positive drainage should be established underneath structural slabs with crawl space. 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. Good water management practices like . Xypex balked at Peters test method, arguing that CMU blocks differ too much in composition to allow a reliable seal. 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. When it is wrapped over masonry ledges, care must be taken to coordinate with masonry ties and thru-wall flashings. Careful attention to installation is critical during both cast-in-place and shotcrete applications in blind-side waterproofing assemblies. 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