Graded pea gravel refers to naturally rounded stone between 3/16 inch and 3/8 inch in diameter. One potential disadvantage is the inability of some liquid products to span cracks or opening of construction joints, which may occur on new buildings soon after application. Design considerations include selecting an appropriate design to achieve the required flow rate. No one size fits all, he said in a telephone call. The interior environment that the foundation wall is subjected to includes environmental control loadings such as thermal and moisture. All core joints and terminations must be covered by fabric overlay. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Therefore, a protection layer is recommended between the waterproofing membrane and the drainage layer. Thickness; 1/4 " 3/8 " 13/32 " 7/16 " 1/2 " 9/16 " 5/8 " 3/4 " 7/8 " 1 3/4 " Mat Type. Injection ports/sites are typically accessed from the building interior. 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. Imperfections in the sprayed coat are repaired or filled with the sealant (Risinger recommends Poly Wall 2200). 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. Home. Fabric covered channels drain water from vertical foundation walls. United States of America The foundation wall may be an integral part of the load bearing design of the building carrying column and floor loads from above, either as distributed loads on the wall or point loads on pilasters integral to the wall system. Since dampproofing cannot withstand hydrostatic pressures, it should not be used on structural elements below the water table where the intent is to prevent interior water leakage. Drainage mat can be fitted with outlets and drainage accessories to further move the water away from the structure. Because of the unique nature of penetrations and Special Features, no single rule or criteria can govern or apply to the effective treatment thereof. 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. Construction joints have been effectively treated in most applications by a waterstop manufacturer's recommended details. The membrane would provide a vapor barrier and a capillary break. FOAMULAR INSUL-DRAIN. The core is bonded to a Moisture Resistive Filter Fabric that functions like an additional layer of Weather Resistant Barrier. In general, using prefabricated composite drainage board directly against certain waterproofing membranes as a protection layer is not recommended. Koster USA expressed the same reservations about the test methods. 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. Originally published on GreenBuildingAdvisor.com. A little bit of water might get through at a puncture or nail hole, but a little water shouldnt be a problem. Abrading & Polishing; Building & Grounds . Bentonite sheets are also typically shingle lapped with the lateral direction of the concrete placement. Sheet-Membrane SystemsSheet membranes used in foundation wall applications include thermoplastics, vulcanized rubbers, and rubberized asphalts. phone +1(201) 933-8800 As most foundation wall systems have substantial mass, e.g. Hot applied, rubberized asphalt systems can be 125 mils to 180 mils thick, plus embedded 60 mil neoprene sheets. 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. One of the reasons that builders may stick with simple dampproofing is cost, says Steve Geiger, product group manager for W.R. Meadows. At times these systems are run internally in the interior surface finish system or in ceiling space. For optimum drainage and thermal performance, install a composite drainage board with integral filter fabric to the exterior of the insulation. Regarding slope to drain, drain tile is intended to be installed with some slope to ensure that the water moves toward the sump collector. See appropriate sections under applicable guide specifications: Unified Facility Guide Specifications (UFGS), VA Guide Specifications, Federal Guide for Green Construction Specifications, MasterSpec. The company suggested that Peter substitute SB Bonding Emulsion for some of the water in the NB 1 Grey mix and apply a primer (Polysill TG500) to the block before coating the CMU. Thickness (ASTM D1777) 10 mm (0.40 in) 10 mm (0.40 in) 6 mm (0.25 in) 25.4 mm (1 in) . They include flexible cementitious coatingssuch as W.R. Meadows two-part Cem-Kote Flex STand panels made with a layer of sodium bentonite (a variety of clay) that expands to form a watertight barrier when it gets wet. The liquid is the carrier, says Russ Snow, sales manager and product group manager for W.R. Meadows, but the products are essentially the same once the liquid has evaporated and the coating has cured. Mat Type; Drainage: Interlocking: Traction: Antifatigue . Waterproofing resists both vapor migration and hydrostatic pressure. 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 GRS Sika Drainage Mat GRS for vegetated roof assemblies consists of an impermeable dimpled polystyrene drainage core. Cosella Dorken Products. Design process includes proper assumption of structural element [] Geotextile filter fabrics are also used for separating differing soil types in below grade enclosure applications. Finish FunctionsTwo areas of finishes are of importance in relation to foundation walls. With drainage, both of these procedures are eliminated. Should you have any questions or comments on the WBDG, please feel free to contact our team at wbdg@nibs.org. Disclaimer, Unified Facilities Guide Specifications (UFGS), Unified Facility Guide Specifications (UFGS), Federal Guide for Green Construction Specifications, Energy-Efficient Products and Technologies. 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. 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. Waterstops should be utilized at construction joints in below grade walls, footings, slabs, and other elements where a waterproof system is required. (11 mm) thick geocomposite drainage sheet system, comprising a hollow studded polypropylene core, covered on one side with a nonwoven, needle punched polypropylene filter fabric and on the other side with a smooth polymeric film. Sq Ft: 325 Material Thickness: .45 inch Core Material: Polypropylene Free Shipping Need a written quote? 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. Materials used may be concrete or reinforced masonry. These systems are advantageous in their lightweight design and cost effectiveness. Hot applied, rubberized asphalt systems can be 125 mils to 180 mils thick, plus embedded 60 mil neoprene sheets. Quantity Add to cart PRODUCT SPECS Model: 3611R Weight: 54 lbs Size: 39" wide x 100' long (27" dia.) For treatment of leaks providing amplified external drainage media similar to that required on the exterior wall is highly effective. Some systems include reinforcing mesh embedded into the liquid. 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. 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. Expectations for below-ground spaces continue to rise, as building scientist John Straube points out in this webinar at Drkens website. But few in the business would argue that even a successful retrofit is better than keeping water out of the basement in the first place. 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. What is the minimum thickness of mat foundation? With fluid membrane systems, proper application in terms of coverage and thickness is critical to performance, and this should be monitored throughout the installation. A variety of sheet- and liquid-applied membranes can be used, all designed to resist the hydrostatic pressure of ground water. 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. 201 Polito Avenue Most building codes require dampproofing as a minimum amount of moisture protection. 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. Roll size: 4 X 50 200 sq. Every variant of EnkaDrain foundation drainage mats is based on the same basic concept: A three-dimensional composite that consists of a drainage core either connected to one or sandwiched between two nonwoven geotextile fabrics. The performance of liquid-applied and sheet membranes is the same, he says, and costs are similar. Floor Slab Schematic. In all cases, installing a perimeter drain below the level of the basement floor is essential. Drainage pipe at the perimeter of the foundation wall should be surrounded by a free draining granular material that is wrapped in filter fabric to prevent fines from filling in the porous spaces of the granular material. 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. 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. Dampproofing/Waterproofing in all situations should be carried up above the upper screen and integrally tied into the building faade flashing and waterproofing. Hydrostatic pressure loads may exist in cases of high water tables or flood events. Special loadings such as blast loads are a design consideration in parking areas under and next to buildings. Blind-side systems are typically either a waterproofing sheet or an impermeable clay-based material. Dimple mat, or dimple board, is a product that seems to fall somewhere in between simple asphaltic dampproofing and a full-on waterproofing membrane. The second area is the finish to the exterior near grade level. Request Online $ Volume Pricing on Large Orders Although the composite board may have a polyethylene sheet on the membrane-side, this sheet is often cut, damaged, or missing. The water flow rate is equal to or better than the aggregate backfill.2. This can be accomplished with pumping systems. The top edge of the membrane should be sealed to the foundation. Tremco, for example, offers two versions of its flagship Tuff-N-Dry membrane, a polymer-fortified asphalt. For surface moisture loadings such as rain and snow, the first line of control is the upper screen at the exterior surface. In stock and ready to ship. With a compression strength of 15,000 psf. Thats what Peter set out to learn. In the drain (i.e. Blog For codes/standards refer to General Overview section. Careful attention to installation is critical during both cast-in-place and shotcrete applications in blind-side waterproofing assemblies. The sump basin is always capped with a lid that is vapor and air tight. Distribution FunctionsFoundation walls may contain distribution systems such as electrical and electronic runs. If Bentonite clay is unconfined, it can shrink upon drying, creating gaps that undermine waterproofing characteristics. 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. At edge overlaps place adjacent panels so the cores abut and secure the fabric at 35' (0.91.5 m) intervals with Sikaflex 11FC or approved adhesive. In soils that go through repetitive wetting and drying cycles, the panels eventually show signs of wear and become less effective than if they had stayed wet all the time. The four function categories, i.e. 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. Detailing around shoring piles and soil tie-back anchors can be challenging and reducing the number or frequency of these types of penetrations will increase the potential for good performance of the waterproofing system. Alternately, hell use a peel-and-stick membrane 40 mils thick over a primer. 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. HYDRODUCT 220 is a strong, preformed 0.44 in. Become a member and get unlimited site access, including the Next is an insulation layer, followed by drain board with an integral air gap. 5 0 obj 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. Early morning TV viewers in Portland, Maine, sooner or later will meet Tony Hafford, founder of T.C. What is the difference between drainage mat and protection course? Hydrostatic pressure can push the coating off the wall. Download Data Sheet get_app. Some municipalities also limit pumping of groundwater as this can lower groundwater levels and affect the support of adjacent structures. Contents: [ show] Components and Working of Foundation Drain 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 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. The use of a Tremco drainage mat provides the following advantages: 1. In general, when properly designed, non-woven products have good filtration and separation properties. The Foundation Protection System that Keeps Basements Dry Protecting your foundations from water and moisture is critical. Special emphasis is placed on evacuating the water at the wall base to avoid water build-up in the back fill or drainage system. Foundation Membrane Material Plastic Coverage Area 520 square foot Thickness 5/16 inch Overall Length 780 inch Overall Width 96 inch Compatible Surfaces Concrete Block, Concrete Shipping Dimensions 96.00 H x 12.00 W x 12.00 D Shipping Weight 70.0 lbs Return Policy Regular Return (view Return Policy) It can be applied to a wet wall. 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. of standing water is equal to 250 pascals, the same as a 70-mph wind. Flower beds, overhanging decks, nearby neighbors and a variety of other site conditions may make this difficult, and it will be expensive. The key advantage to fluid systems is their monolithic nature and self-flashing abilities as the material is applied in liquid form. If the builder is treating 1,000 square feet of foundation wall, the cost would be $1,000 vs. $220 (without factoring in labor). Moisture in the soil cause the bentonite to expand, sealing out ground water. An interior drainage layersuch as dimple mat or sheet waterproofing membranecan be added. The foundation wall system may include an earth retention system of soldier piles and wood lagging or shotcreted rock requiring consideration of waterproofing applied to the earth retention system. 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. Peel-and-stick and liquid-applied membranes are common on residential sites, but manufacturers offer several other options. Contractors like U.S. Waterproofing have a variety of options for tackling repairs from the inside. below the bottom of the slab-on-ground. For positive side applications, the installation of protection boards or insulation layers as quickly as possible after membrane installation is critical to prevent mechanical damage form subsequent layers and backfill and form ultraviolet radiation. However, classification of common penetration types and features helps to ensure effective treatment and proper function. Good water management practices like . They were used mainly for storing coal and potatoes. There is a combination of environmental design loadings at this interface such as surface water, runoff, and cavity wall drainage. Hammer & Hand uses essentially the same procedure. Contact water/dampproofing membrane manufacturers for specific information regarding compatibility with FOAMULAR & FOAMULAR NGX INSUL-DRAIN boards. Featured Resources Tyvek DrainVent Rainscreen - Install Guide This section provides specific description of materials and systems common in foundation walls and below grade building enclosure systems in general. 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. Cementitious SystemsThese systems contain Portland cement and sand combined with an active waterproofing agent. 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. 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