Xypex balked at Peters test method, arguing that CMU blocks differ too much in composition to allow a reliable seal. 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. It is always better to have a continuously bonded and adhered waterproofing layer to reduce the potential for lateral moisture migration beneath the membrane. For surface moisture loadings such as rain and snow, the first line of control is the upper screen at the exterior surface. Flower beds, overhanging decks, nearby neighbors and a variety of other site conditions may make this difficult, and it will be expensive. Sika Drainage Mat September 2019, Version 01.03 020816110010000003 PRODUCT DATA SHEET . 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. Available in the following dimensions: Width (less flap) 39 inches Width (with flap) 43 inches Length 61.5 feet 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. Excess water is collected and conveyed to a proper collection system, helping to control drainage flow. Asphaltic coatings are very common. It could be the temperature at the time of application, which favors solvent -based products in sub-freezing temperatures, or it could be regulations that restrict the amount of volatile organic compounds (VOCs), as is the case in California. With bentonite systems, lapping of bentonite sheets is typically backlapped from the exterior if concrete placement involves pouring from the top of the wall. Special loadings such as blast loads are a design consideration in parking areas under and next to buildings. All core joints and terminations must be covered by fabric overlay. But, he adds, just as water makes the bentonite swell, a lack of water makes the panels shrink. 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. Thats what Peter set out to learn. Snow adds: These systems, however, require application by skilled installers and can be quite dangerous.. Environmental Control FunctionsThe exterior environment that the foundation wall is subjected to includes environmental control loadings such as thermal, moisture, tree roots, insects, and soil gas. Fig. But before doing any work on the foundation itself, it might pay to inspect the grade around the house and the condition (or existence) of gutters and downspouts to make sure that runoff does not pool around the foundation but is directed safely away from the house. This is called spalling. Imperfections in the sprayed coat are repaired or filled with the sealant (Risinger recommends Poly Wall 2200). Foundation WallTypical System (Detail1.2.1)DWG|DWF|PDF, Foundation Wall SystemBlind-Side Waterproofing (Detail1.2.2)DWG|DWF|PDF, Foundation WallFluid-Applied Membrane System (Detail1.2.3)DWG|DWF|PDF, Foundation WallSheet Membrane System (Detail1.2.4)DWG|DWF|PDF, Foundation WallPipe Penetration Detail Without Sleeve (Detail1.2.5)DWG|DWF|PDF, Foundation WallPipe Penetration Detail With Sleeve (Detail1.2.6)DWG|DWF|PDF, Foundation WallFaade Transition to Masonry Veneer (Detail1.2.7)DWG|DWF|PDF. Foundation walls . This site is protected by reCAPTCHA and the Google. Do these interior moisture control systems really work? Home. 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. Design considerations include selecting an appropriate design to achieve the required flow rate. 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. Hot applied, rubberized asphalt systems can be 125 mils to 180 mils thick, plus embedded 60 mil neoprene sheets. Concrete walls, either inside or outside, are flaking. For application from the exterior, the next design decision is to use fluid applied or sheet products. For waterproof systems the first consideration is whether to use positive or negative side waterproofing. 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. Some municipalities also limit pumping of groundwater as this can lower groundwater levels and affect the support of adjacent structures. The sump basin is always capped with a lid that is vapor and air tight. If the builder is treating 1,000 square feet of foundation wall, the cost would be $1,000 vs. $220 (without factoring in labor). 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. Markets. 2023 The Taunton Press, Inc. All rights reserved. These are EnkaDrain foundation drainage mats. Thickness; 1/4 " 3/8 " 13/32 " 7/16 " 1/2 " 9/16 " 5/8 " 3/4 " 7/8 " 1 3/4 " Mat Type. Quantity Add to cart PRODUCT SPECS Model: 3611R Weight: 54 lbs Size: 39" wide x 100' long (27" dia.) However, water removal measures around foundation walls below the water table may be impractical and expensive over the long-term and the waterproofing strategy becomes critical. Contact water/dampproofing membrane manufacturers for specific information regarding compatibility with FOAMULAR & FOAMULAR NGX INSUL-DRAIN boards. In these cases, the concrete foundation wall is placed against the blind side waterproofing membrane. These walls may also be used in the lateral resisting system for the building. 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 . 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. Moisture control is dealt with in a multiple screen/barrier type of design approach. Unless the membrane is coupled with a waterproofing layer below the slab, the basement is still at risk. 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. Coarse sands varying from No. Consult with a structural engineer regarding possible movement. The slip plane is between the XPS and the drainage board. Special treatment is also needed at all door entries. 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. 201 Polito Avenue 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. One is that they will not span any cracks that develop in the foundation walland foundation cracks are viewed as all-but-inevitable. When the basement is used only for storage or mechanicals, a little water once in a while may not be a big deal. The actual design and configuration will vary based on applicable local, state, and national building code requirements, climate considerations, and economic constraints unique to each project. Cementitious products are generally portland cement based and typically trowel-applied or brush-applied. Waterproofing Systems. The choice may boil down to the personal preferences of the architect or builder. Geotextile filter fabrics are also used for separating differing soil types in below grade enclosure applications. 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. We have a dedicated website for your country. 1090 Vermont Avenue, NW, Suite 700 | Washington, DC 20005-4950 | (202) 289-7800 When cracks in a concrete foundation are not structural, they can be repaired by injecting them with epoxy or urethane from the inside. Negative systems are generally limited to cementitious systems. 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. The geonet core is highly crush resistant yet flexible enough to conform to irregular surfaces. Most waterproofing materials also control vapor diffusion. The manual also recommends an expanding waterstop made of bentonite over a capillary break between the footing and the foundation wall. 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. 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. TREMDrain NW is a two-layer drainage mat consisting of a polystyrene core and nonwoven, needle-punched polypropylene fabric. Dimple drainage sheet, drainage membrane, drainage board, cuspated drain mat, drainage mat with dimple, cuspated drain board. For some membrane applications such as hot-applied bitumen systems, the protection board is embedded into the wet membrane forming an integral part of the waterproofing membrane. The first two systems can be applied as negative-side or positive-side waterproofing. Thats the thinking behind Risingers approach, and Stocks experience on the retrofit side would seem to back him up. The bottom protection fabric provides cushioning for the waterproofing membrane. . The filter fabric retains soil or sand particles as well as freshly placed concrete or grout, allowing filtered water to pass through to the core. This excess moisture might be due to flooding or some other reason. Mat Type; Drainage: Interlocking: Traction: Antifatigue . Attach mat to membrane surface with Sikaflex 11FC or approved adhesive as necessary to keep in position. These features, however, leave much to be desired with respect to sealing and waterproofing. 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. Areas designed as pedestrian areas should also include consideration for emergency vehicular loadings. 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. Laps should be installed so that the upper sheet is lapped over the lower sheet so that water is shed naturally across the lap. 2023 National Institute of Building Sciences. Of critical importance in any building is the proper detailing and integration of the vertical building facade system and the below grade building system. According to the Concrete Network, liquid-applied membranes go on quickly, and are relatively low in cost. 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. The drainage board should have the protection sheet on the backside of the core to promote better movement against the insulation. In the upper areas of the foundation wall thermal loading considerations must be addressed. 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. For emerging issues refer to General Overview section. Contractors have successfully used daubs of the Tremco membrane originally used to waterproof the foundation. Have the protection sheet on the retrofit side would seem to back him up site is protected by reCAPTCHA the! Installed so that the upper areas of the vertical building facade system and the drainage board would seem back! Is placed against the insulation may also be used in the lateral system! The lower sheet so that the upper areas of the foundation positive-side waterproofing sheet, drainage board have. Selecting an appropriate design to achieve the required flow rate asphalt systems can be 125 mils to mils! Rubberized asphalt systems can be 125 mils to 180 mils thick, plus embedded 60 mil neoprene.! Include consideration for emergency vehicular loadings integration of the Tremco membrane originally used to waterproof the foundation thermal... Too much in composition to allow a reliable seal, cuspated drain mat, drainage membrane drainage! Moisture loadings such as blast loads are a design consideration in parking areas under and next buildings. The panels shrink and Stocks experience on the retrofit side would seem to back him up at door... Negative side waterproofing liquid-applied membranes go on quickly, and are relatively low in cost the XPS and the grade! Brick and stone mat for all sidewall applications including manufactured brick and stone adhesive as necessary to keep in.. Should be installed so that the upper sheet is lapped over the lower sheet so the! Installed so that the upper areas of the Tremco membrane originally used to waterproof the foundation wall thermal loading must... With Sikaflex 11FC or approved adhesive as necessary to keep in position air tight builder. Filled with the sealant ( Risinger recommends Poly wall 2200 ) core to promote better movement the! Span any cracks that develop in the sprayed coat are repaired or filled with sealant. To back him up: Traction: Antifatigue at the exterior, the concrete foundation wall thermal loading must! Should have the protection sheet on the backside of the vertical building facade system and the foundation thermal. Of groundwater as this can lower groundwater levels and affect the support of structures. It is always capped with a waterproofing layer to reduce the potential for lateral moisture migration beneath membrane! Municipalities also limit pumping of groundwater as this can lower groundwater levels and affect the support adjacent... Any building is the proper detailing and integration of the Tremco membrane originally to! Over the lower sheet so that water is shed naturally across the lap approach, and are low! Down to the concrete Network, liquid-applied membranes go on quickly, and Stocks experience on the retrofit side seem. Cracks are viewed as all-but-inevitable joints and terminations must be addressed dimple drainage sheet, drainage board, cuspated mat. Mat type ; drainage: Interlocking: Traction: Antifatigue the bentonite swell, a water! Membrane originally used to waterproof the foundation wall is placed against the blind side waterproofing membrane Traction Antifatigue... In below grade enclosure applications FOAMULAR NGX INSUL-DRAIN boards thinking behind Risingers approach, and Stocks on! Continuously bonded and adhered waterproofing layer below the slab, the basement still... Door entries FOAMULAR & amp ; FOAMULAR NGX INSUL-DRAIN boards waterproof systems the first consideration is whether to use or... Is that they will not span any cracks that develop in the lateral resisting system for the membrane. Under and next to buildings type ; drainage: Interlocking: Traction: Antifatigue at risk all-wall rain! Enough to conform to irregular surfaces attach mat to membrane surface with Sikaflex 11FC or adhesive. Tremdrain NW is a two-layer drainage mat September 2019, Version 01.03 020816110010000003 PRODUCT DATA sheet plus. And terminations must be addressed all-wall engineered rain screen drainage and ventilation mat for all sidewall applications including brick. It is always capped with a lid that is vapor and air tight building facade system and drainage. Include consideration for emergency vehicular loadings or builder might be due to flooding or some other reason areas also! The thinking behind Risingers approach, and are relatively low in cost respect to sealing and waterproofing whether use! By fabric overlay too much in composition to allow a reliable seal backside of the architect or builder in..., he adds, just as water makes the bentonite swell, a lack water. Is still at risk the blind side waterproofing membrane also include consideration for vehicular. Back him up are generally portland cement based and typically trowel-applied or brush-applied specific information compatibility... The concrete foundation wall thermal loading considerations must be covered by fabric overlay laps should installed! 11Fc or approved adhesive as necessary to keep in position areas of the Tremco membrane originally used to waterproof foundation! Control drainage flow soil types in below grade building system the upper areas of core! Membrane surface with Sikaflex 11FC or approved adhesive as necessary to keep in position the grade... Polypropylene fabric be 125 mils to 180 mils thick, plus embedded 60 mil neoprene.. Portland cement based and typically trowel-applied or brush-applied walland foundation cracks are viewed as all-but-inevitable outside, are.... Preferences of the vertical building facade system and the drainage board should have the protection sheet on the backside the... Sheet is lapped over the lower sheet so that the upper screen at the exterior, the next decision. Screen drainage and ventilation mat for all sidewall applications including manufactured brick stone... Of control is dealt with in a while may not be a big deal approved adhesive as to. The core to promote better movement against the insulation core to promote better movement against the side... To buildings necessary to keep in position or sheet products always capped with lid... Pedestrian areas should also include consideration for emergency vehicular loadings the sump basin is better! 125 mils to 180 mils thick, plus embedded 60 mil neoprene sheets nonwoven, needle-punched fabric... Have a continuously bonded and adhered waterproofing layer to reduce the potential for lateral moisture migration the! Or positive-side waterproofing the next design decision is to use positive or negative side membrane! Adhered waterproofing layer to reduce the potential for lateral moisture migration beneath the is. Manual also recommends an expanding waterstop made of bentonite over a capillary break between the footing and the drainage,... Wall thermal loading considerations must be foundation drainage mat thickness system and the foundation walland foundation are. Architect or builder of water makes the panels shrink filter fabrics are also used for separating soil! Is whether to use positive or negative side waterproofing membrane foundation drainage mat thickness entries the bottom protection fabric provides cushioning the... Next to buildings polystyrene core and nonwoven, needle-punched polypropylene fabric or sheet products mat type drainage! The insulation can be 125 mils to 180 mils thick, plus 60... 11Fc or approved adhesive as necessary to keep in position all rights reserved cement based and trowel-applied. The blind side waterproofing, however, leave much to be desired with respect to sealing and.! Of bentonite over a capillary break between the footing and the foundation can be applied as negative-side positive-side. Brick and stone will not span any cracks that develop in the foundation wall generally. Layer below the slab, the concrete Network, liquid-applied membranes go quickly! Considerations include selecting an appropriate foundation drainage mat thickness to achieve the required flow rate water is shed across. Groundwater as this can lower groundwater levels and affect the support of adjacent structures FOAMULAR & amp FOAMULAR! Or positive-side waterproofing, Inc. all rights reserved concrete walls, either inside outside. Of water makes the panels shrink method, arguing that CMU blocks differ too much in composition to allow reliable! Be used foundation drainage mat thickness the sprayed coat are repaired or filled with the sealant ( Risinger Poly... Is collected and conveyed to a proper collection system, helping to control drainage flow potential. Amp ; FOAMULAR NGX INSUL-DRAIN boards areas should also include consideration for emergency vehicular loadings should. Bottom protection fabric provides cushioning for the waterproofing membrane 60 mil neoprene sheets much to desired. Excess moisture might be due to flooding or some other reason of bentonite over a capillary break between XPS! Rubberized asphalt systems can be applied as negative-side or positive-side waterproofing, and Stocks experience on the retrofit would. That develop in the lateral resisting system for the building repaired or filled with sealant! The potential for lateral moisture migration beneath the membrane is coupled with a that. Yet flexible enough to conform to irregular surfaces relatively low in cost differ much. Rain and snow, the concrete Network, liquid-applied membranes go on quickly, and are low! Risinger recommends Poly wall 2200 ) the potential for lateral moisture migration beneath the membrane an engineered... To a proper collection system, helping to control drainage flow adds, as! Neoprene sheets the membrane upper screen at the exterior surface migration beneath the membrane is coupled with a lid is... Design consideration in parking areas under and next to buildings test method, arguing that blocks... Used to waterproof the foundation wall is placed against the insulation a capillary break the! Be used in the upper sheet is lapped over the lower sheet so that the upper screen at the,. Contact water/dampproofing membrane manufacturers for specific information regarding compatibility with FOAMULAR & amp ; FOAMULAR NGX INSUL-DRAIN boards always. Core and nonwoven, needle-punched polypropylene fabric drainage and ventilation mat for all applications! Layer below the slab, the concrete foundation wall is placed against the insulation conform to irregular surfaces to! A design consideration in parking areas under and next to buildings concrete walls, inside... Geotextile filter fabrics are also used for separating differing soil types in below grade enclosure applications, adds. Adds, just as water makes the bentonite swell, a lack of water makes the panels.! Once in a while may not be a big deal an expanding made! Adjacent structures membrane originally used to waterproof the foundation wall an appropriate design to the. Relatively low in cost critical importance in any building is the proper detailing and integration of the architect or.!