PVC Membranes; PVC Accessories; PVC Adhesives; ALSAN® RS Liquid Resins. Winston-Salem, NC 27103. All of our PVC membrane products offer superior weldability and the proven fire and chemical resistance of PVC. Contact us today to schedule your FREE On-Site Inspection. For more information about this video or Fausfloor® products visit holes in the barrier for electrical outlets, pipes, windows, and so on. Tips for concrete floor vapor barrier installation: 1. ”. . Project Location in Tulsa. $29. Polyurethane sheeting is a typical vapor barrier that contractors use to prevent moisture from penetrating the walls of a basement. Winston-salem / High Point Location. I recommend a minimum 10-mil-thick polyethylene material, even if your local building code allows a 6-mil, as it lasts longer and is less prone to punctures. Skip to main content. ft. Vapor Barrier Installation Tips. $72. SOPRASEAL LM 202 VP is a water-based, ultra low VOC liquid product composed of a modified rubber formulation. Stego Wrap Vapor Barrier will help remove the risk of water vapor accumulation and the transmission of various soil gases. 200Sqft AMERIQUE 3mm thick flooring silver chrome underlayment padding with tape & vapor barrier 3-in-1 heavy duty foam (200Sf TOTAL, pack of 1, 200Sf/roll); mold and moisture protection, non allergenic, 3mm closed foam technology for sound reduction; anti-crush technology for excellent performance & long life; perfect for wood, bamboo. We hope this article has been helpful. $143. A smarter approach to air and vapor control. Sentinel 6mm Cork Underlayment Roll. Extend Vapor Sentinel 10-Mil Vapor Barrier up the foundation wall. $29. For example, a basic vapor barrier will not provide extra padding. 3. SDS. No need to bother with large fold-out, low quality, off-spec, construction grade films, which can be bothersome and hard to use before the. 5 in. x 140 ft. 00 for the materials (stakes for securing the. Water vapor is a gas or "vapor". We needed air barriers not vapor barriers to control vapor flow. More isn’t always better. Buy from trusted and established brands like Sentinel ; The most affordable underlayment items;. Air & Vapor Barrier Laminated Boards. Buy from trusted and established brands like Sentinel ; The most affordable underlayment items; Order online for quick and convenient delivery or shop in-store; Check out the full range of underlayment materials and subfloor installation products from Floor & Decor on this page and place your order today. 00 / piece Size: 194sqft. Note that "mil" is a shorthand term used for a plastic. To install a vapor barrier, you’re going to need to take the following steps: Dry out your crawl space or a section of your basement. MOISTURE PROTECTION: Helps prevent mold, mildew, and other issues related. 99 / piece Size: 100sqft. Make sure it is of the right size for your basement – 2 feet wide by 3 feet long is ideal. Also apply adhesive around all locations where you cut holes in the plastic. BEST OVERALL: Roberts First Step Premium Underlayment. Before installing a vapor barrier, it is crucial to ensure that the concrete floor is clean, dry, and free of any debris. PDS. If required, the system can easily be. 0 via. All conduit bends should avoid 90 degrees, if 90 degree bends are necessary only utilize a long sweep 90. Consult local building codes prior to installation and to determine the length to cut barrier. PANGO® WRAP TERMITE/VAPOR BARRIER INSTALLATION INSTRUCTIONS P4 of 7 5. The cost of strong vinyl tape for securing plastic at the edges and for taping sheeting. A coordination meeting should. Despite my strong belief that a below-slab vapor barrier should always be located in direct contact with the slab, you should always confer with the designer and engineer of record about how to meet the unique demands of slab design with the overall construction of the building. Learn how the work and why they're essential. 1. $72. At Alpha Foundations, we have the expertise and experience to install vapor barriers and encapsulate crawl spaces properly, ensuring that your home is protected from excess moisture. C all (888) 930-6604 for more information about a methane mitigation plan. roll. Air & Vapor Barrier Laminated Boards. Sentinel Moisture Barrier Polyethylene Film. SOPRASOLIN HD. We're here to help. Prepare your concrete floor. Q. Courtesy of Steve Maxwe. drywall without a vapor barrier in a year, but 50 cups will enter through a ½" round hole. $143. Sentinel Underlayment Installation Instructions. Sentinel 6mm Cork Underlayment Roll. Choose from polyester- or fiberglass-reinforced membranes, available in ENERGY STAR® approved white, as well as a. Step 6: Install the flooring over the vapor barrier. This misunderstanding arises because air typically holds a great deal of moisture in the form of vapor. But we also want an estimate to install a vapor barrier in the crawl space. Step 2: Prepare the basement walls. The SSDS was equipped with Sensaphone Sentinel Alarm System designed to alert the owner or operator if any system parameters fail preset thresholds or if power to the system is interrupted, ensuring tenants are protected from. 94 / piece Size: 100sqft. Sentinel Premium Quiet Underlayment. No more than 3 – 90 degree bends should be made for any sentinel wedge installation. Steel, aluminum, wood, plastic, and glass are all examples of galvanized steel, in addition to galvanized steel, aluminum. The result is a system that effectively stops, collects, and exhausts radon. Tip #1: Seal to the Slab with Stego Crete Claw Tape. Pr. $72. Page 6: Installation INSTALLATION The area to be controlled should be sealed with a vapor barrier. rolls eliminate the hassle of dealing with a giant sheet of folded plastic. The Vapor Sentinel Soil Gas Control System is a sub-slab ventilation system that traps harmful radon and chemical VI gases and prevents them from entering the building. Economical mitigation strategy. Some liquid vapor barriers dry via “solvent. mold proof and vapor-resistant; Installation on walls, showers, countertops, and tub surrounds; Lightweight but strong, easy to handle. SENTINEL P200 HFB is. 4. Compared with other barriers in this category, the American sentinel basic vapor barrier has a convenient design. The use of a physical termite barrier provides a non-toxic approach to subterranean termite protection and aligns with the principals of Integrated Pest Management. When no curb is used (standard height base), the frame should be set so that the upper mounting plate is flush with the concrete surface. Vapor Barrier 4. I’ll give you a basic rule of thumb on this one: 1 full (180’ long) roll of seaming tape for every 1,000 sq ft of vapor barrier material needed. 5mm NuCore Blonde Oak Rigid Core Luxury Vinyl Plank - Cork Back looks and feels like wood and tile, but can be installed where real wood cannot. $34. in 1948, these code requirements were never based on science—they were based on erroneous theories promoted by manufacturers who were worried about liability issues associated with. Installation. Seal Stego Wrap along all terminating. We would like to show you a description here but the site won’t allow us. Check for protruding nails and defects in the subfloor. Even if a vapor barrier is the best, improper design will lead to improper installation and likely render the effort a failure. Air & Vapor Barrier Laminated Boards. 99 / piece Size: 120sqft. Subscribe Now:. However, it’s important to note that the final cost may differ. per foot is usually the best thing you can do to reduce crawlspace moisture. Installation Instructions. Learn how to properly install StegoHome Below-Slab Protection to protect against water vapor and soil gases like radon in your next home building project. Unroll the vapor barrier and lay it over the concrete surface you wish to protect. • Reduce in-room noise and impact sound for quieter, more pleasant spaces. (Source: Sentinel Pest) In Conclusion. 7(4) where applicable. 00 / piece Size: 194sqft. Apply a continuous bead of adhesive to the other side of the seam. A well-installed air barrier controls both the flow of air. SOPRASEAL STICK VP is composed of a tough tri-laminate composite facer coated with a high-tack adhesive and protected with a silicone release film. If. $72. The three. When it floods, rains, or the temperature drops, water enters the crawl space and stagnates. Cut holes in the barrier for electrical outlets, pipes, windows, and so on. Crawl under your mobile home by entering through the skirting. 99 / piece Size: 100sqft. A single roll of black 6mm vapor barrier (10×100) covering 1,000 square feet will cost approximately $70. The plastic sometimes used on the warm-side of building walls (on the wall interior under drywall in northern climates) is a vapor barrier. 6 mil reinforced vapor barrier. Sentinel Eco Underlayment. SENTINEL® P150. We used 10mil vapor barrier, vapor barrier seam tape, and Zip System flashing tape for this installation. ASTM E1643 discusses how to overlap seams, seal pipe and utility penetrations, and repair damaged areas in the vapor retarder. SKU: 100586825. 4. Class II barriers are semipermeable, allowing some fluid to get through. Seal Stego Wrap along all terminating. S. ft roll): This 3-in-1 underlayment can be used under any laminate flooring to allow your floor to float and create a moisture barrier. Flooring 101 Tips to avoid problems, and things to look out for when you lay laminate flooring to ma. By sealing off the crawl space, the. If you require additional assistance with more specific issues, please call us at 877-379-7658. Many people overlook this step, but it’s essential. You will want to overlap the vapor barrier equal to 2 inches or more on the wall. Water vapor will always move from a higher partial water vapor pressure environment -- a function of temperature and relative humidity -- typically found below the. minimize and prevent chemical vapor intrusion in newly constructed buildings. SENTINEL® Skirted Drip Edge. SECTION 4 Stego Wrap Vapor Barrier and Retarder Installation Instructions 6 Always consult the project design team for where to terminate the vapor barrier to strike the balance between the location of the vapor barrier on or around foundation constructions and any structural concerns before proceeding. We manufacture roofing products such as industry-leading SBS-modified bitumen roofing membranes, polymeric PMMA/PMA liquid-applied membranes and synthetic single-ply PVC membranes. Vapor Barrier Installation. First introduced in the U. When you specify Stego Barrier Solutions and products, you gain access to a large nationwide network of full-time technical sales managers providing unmatched local support and service. The insulation (fiberglass or cellulose) is then placed on top of the drywall with no vapor barrier above or below. ft. Sentinel XS Radon Vapor Barrier is available in 4’, 8’, 12’ and 20’ widths. Topside. 100sqft 5. 08 to $0. The cost of strong vinyl tape for securing plastic at the edges and for taping sheeting. Made of a blend of granulated cork and polyethylene foam, the noise-dampening barrier has an IIC rating of 73 and provides advanced sound absorption. GREAT VALUE. Finally, unroll the vapor barrier and press it firmly onto the concrete floor. 4a); Pango Wrap and Pango Tape (Fig. We are looking to add an access either from within the house. If installing Pango Wrap ® Termite/Vapor Barrier, you can review the installation. 4 - Extend vapor retarder over footings and seal to foundation wall, grade beam,The Vapor Sentinel New Construction System is a solution for soil gas control to. Why Is a Vapor Barrier Important in Wine Cellar Design? Vapor Barrier: An enclosure around an entire room that is needed to control humidity. Cost-effective: Polyethylene vapor barriers are relatively affordable compared to other types of barriers, making them a popular choice for both residential and commercial applications. 1. Water damage to wood foundation & busted pipes. All seams overlap a minimum of 6 inches for taped-seam installation and 3 inches when seamed via heat welding equipment by a qualified contractor. Step 1: Site Review, Site Conditions, and Prep. In homes with dirt basements, they poured a concrete floor or installed a vapor barrier. Duct tape won't cut it; it's too porous. Stagger the end laps 12" (305 mm). Rigid air barrier materials for use behind showers and tubs include fiber-cement, fiber-reinforced gypsum, glass mat gypsum, or fiber mat-reinforced cementitious backer panels. Vapor barrier material costs: The cost of 6 mil plastic sheeting ideal for use as a vapor barrier costs just $0. 2. Staple the vapor barrier material to the wood floor joists of your mobile home with a staple gun. Air & Vapor Barrier Laminated Boards. The added benefit to this underlayment is sound cushioning. 194sqft 1. The barrier comes in rolls about twenty-four inches wide. Vapor 3-in-1 Blue underlayment is the most budget friendly option of all vapor barrier underlayment. Sentinel Premium Quiet Underlayment. USES: Vapor Sentinel 10-Mil Vapor Barrier is used for sub-slab installations, to protect indoor structures from soil gas transmissions, as well as moisture vapor. What is a Vapor Barrier? A vapor barrier is an impermeable membrane primarily used to resist water vapor transmissionSentinel XS Radon Vapor Barrier is a 5 layer barrier engineered to have low permeability, extreme strength on a very durability material. Sentinel Moisture Barrier Polyethylene Film. Apply Clear All Approximate Size Approximate Size 1000sqft 1. Barrier Seaming Tape is a low-permeance tape. Improved Energy Efficiency: The condition of your crawl space can. Sentinel 6mm Cork Underlayment Roll. The downside to using a waterproofing membrane is that it's expensive. All seams overlap a minimum of 6 inches for taped-seam installation and 3 inches when seamed via heat welding equipment by a qualified contractor. BITUTAK® MB Mineral is a 4. In very warm, humid climates such as the Southeastern United States, crawlspace encapsulation is often the most effective way to solve and prevent moisture damage. SOPRASOLIN HD is a multi-purpose self-adhered membrane composed of proprietary SBS-modified bitumen. 2. before the installation of the V-Force™ Vapor Barrier Membrane. ASTM E1643, Section 6. 50 per square foot on average, depending on the thickness of the plastic, which ranges from 6 to 20 millimeters. 14 ft. We offer PVC roof pipe flashings and flashing solutions. Areas like your crawl space are susceptible to encountering moisture damage. Most vinyl underlayments are 1mm to 1. Sentinel Eco Underlayment. Vapor barriers are installed directly over the soil and secured with spikes. The Science of Moisture Movement . How did this project turn out? WATCH HERE: the easiest way to seal u. 99 / piece Size: 120sqft. Air & Vapor Barrier Laminated Boards; Air & Vapor Barriers. Subsequent approved inter-ply or cap ply membranes are applied to SOPRALENE Flam 180 via heat welding. Add vapor tape outside the plastic sheet to prevent moisture from entering. As a recycled product, it may have slight. Some people assume that foundation wall vents can help prevent moisture and rot in a crawl space, but building codes do not require them when properly encapsulating a crawl space with a Class I vapor retarder and conditioned air supply is in place (Source: 2015 IRC – Section R408. An average vapor barrier installation costs $2 to $4 per square foot or between $1,200 and $4,000 for materials and labor. 1. Let’s break things down. We offer Free in-store returns in case you need to return extra material. $29. , 6–15 mils) that are used to mitigate moisture transmission through concrete. 194sqft 1. Green Building Council (USGBC) for Leadership in Energy and Environmental Design (LEED). 25-0. $29. A durable barrier system that saves on your bottom line. Home | AmeristarInstalling a vapor barrier in your crawl space offers a solution that is both efficient and effective in combating excess moisture. It’s worth noting that the thicker material your vapor barrier has, the more costly it will be. So the boards are resistant against water, moisture and humidity, SENTINEL CEMENT FOAM BOARD is an excellent alternative to traditional wall at shower, sauna, and any wet area where waterproofing and vapor barrier is absolute necessary to protect your home from mold and mildew. We recommend working from left to right. Additionally, the overlapped seams can cause some unevenness. SENTINEL UNIVERSAL SEALANT is a moisture-cured, polyether, elastomeric sealant for use in approved SENTINEL PVC. 30in. Installing the best vapor barriers in your garage walls will significantly. GreenGuard Gold Vapor Barrier Vapor Barriers provide additional protection between the subflooring and flooring by preventing the emission of vapors and moisture to the inside of the home. Roberts Black Jack has a 4″ attached overlap and adhesive strip to make installation a breeze. $72. MOISTURE PROTECTION: Helps prevent mold, mildew, and other issues related to vapor. 99 / piece Size: 120sqft. Lay out pieces of scrap wood on top of the vapor barrier so that you can use them as guides when cutting the material. Trim excess material and seal seams with vapor barrier tape for moisture prevention. $29. SOPRALENE Stick is an SBS-modified bitumen, self-adhered base ply for use in approved multi-ply membrane and flashing assemblies. Chemical vapor barriers represent a significant expense and the building owner should be encouraged to use a Professional Engineer for this aspect of the project. Safe Handling Precautions Practice good housekeeping and personal hygiene and always wash hands after handling the product. $24. Sentinel Protect Plus ®, with built in vapor barrier, offers superior moisture protection, sound reduction, thermal protection, and softness underfoot to help to ensure a quality. Baker’s Waterproofing uses only the highest quality vapor barrier materials and installation methods to ensure a fast and effective installation. It is made from 100% recycled contents that are environmentally safe, and a baked silicone coating that provides moisture impermeability under wood flooring. Its solution was STEGO CRETE CLAW. Unroll and cut vapor barrier. It allows the user to create effective methods in detailing PVC-to-metal transitions. 0 in desired position and back roll the product. 24 hours as measured by the Anhydrous. It is recommended to use Sentinel Protect Plus Underlayment for optimal sound absorption and moisture resistance or a standard vapor barrier like 6mil PE Film. 99 / piece Size: 120sqft. NOTE: Stego Industries recommends the use of vapor barrier-safe concrete accessories, like Beast® Screed, to help minimize the amount of penetrations in a Stego Wrap Installation. SOPRALENE 180 SP 3. And bring the plastic about 6 in. Seal all seams, gaps, and holes in the air barrier with caulk or foam before tub/shower installation. 200sqft 1. Press the two pieces of the vapor barrier together and smooth out any wrinkles or creases. ULTRA-STICK Nail Base SDS. 120sqft 1. Adhesive strips are included for quick and easy installation. x 50ft. SECTION 4 Stego Wrap Vapor Barrier and Retarder Installation Instructions 6 Always consult the project design team for where to terminate the vapor barrier to strike the balance between the location of the vapor barrier on or around foundation constructions and any structural concerns before proceeding. SOPREMA products include accessories for PVC roofing. SECTION 4 Stego Wrap Vapor Barrier and Retarder Installation Instructions 6 Always consult the project design team for where to terminate the vapor barrier to strike the balance between the location of the vapor barrier on or around foundation constructions and any structural concerns before proceeding. Installation. Class A has the lowest perm rate while Class B (from 1 to 10 perms) and Class C (greater than 10 perms) allow higher perm rates. Get tips on working on flooring under various types of conditions with help from a foreman for Lighty Contractors in this free video series. This is not a project you want to do twice. Sentinel Premium Quiet Underlayment. Check for protruding nails and defects in the subfloor. Sentinel Premium Quiet Underlayment. 200sqft 1. S. Vapor is principally transported by air flow not by vapor diffusion. We used Farm Supply brand 6 mil reinforced string solid white vapor barrier, Blue Summit vapor barrier seam tape, and Zip System. Vapor Sentinel New Construction is your ultimate vapor barrier solution for protecting your new developments against soil vapor intrusion. $169. The built in moisture barrier protects your floor against harmful moisture vapor. Prepare The Area. All seams overlap a minimum of 6 inches for taped-seam installation and 3 inches when seamed via heat welding equipment by a qualified contractor. Sentinel Moisture Barrier Polyethylene Film. $143. Additionally, the overlapped seams can cause some unevenness. Eco Ultra Quiet Premium Acoustical Underlayment. After much research, I have a lot of conflicting advise about the need to add a vapor barrier before installing the backer (hardy / cement) board for my bathroom shower. Its dense construction makes it a universal underlayment, suitable for use under many types of floors with a variety of installation methods. 120sqft 1. Calculate my square footage. A properly installed vapor barrier coupled with adequate ventilation will prevent moisture from accumulating in a home’s crawlspace. Use more butyl tape to secure the bottom of the vapor sheet. Vapor retarder materials shall be classified in accordance with Table R702. Visit Stego Wrap Barrier 15-Mil. $58. CALI. Seattle: (206) 365-5467. Eastside: (425) 823-9790. For additional information, please contact us. 30in. No need to bother with large fold-out, low quality, off-spec, construction grade films, which are bothersome and hard to use before the floor is installed. DUOTACK® SPF ADHESIVE. 07 m) sheet metal plate to support the end lap between deck ribs. Make sure this fits by entering your model number. Wipe dust from wall curtain prior to installing floor liner. This 500 sq. Pango Wrap is a physical termite barrier against subterranean termites and moisture vapor. Air & Vapor Barrier Laminated Boards; Air & Vapor Barriers. vapor intrusion is most likely to be a problem. Installation. When installing the base on a curb, the frame should be set so that the upper mounting plate is flush with the concrete surface. 200sqft 1. Seal Stego Wrap along all terminating. This underlayment also has a pre-attached vapor barrier to protect floors from moisture escaping concrete subfloors. The yellow plastic film should face the subfloor and the overlap should be on the opposite. The lower the perm rate, the better for slabs. Choose fasteners that are suitable for the material of your crawl space walls. 0 is then heat welded to approved substrates. If unit is installed in a crawlspace, all vents should be sealed. 5-mm Premium Cushion Flooring Underlayment (100-sq ft /Fan fold) Model # 1102002500. 5 mm) Installation SENTINEL P150 HFB is applied to approved substrates via. SOPRASOLIN HD is designed to waterproof around vents, chimneys,. Subscribe Now:. Install the insulation. 08 to $0. [This exception is not in 2021 IBC] R702. If any of the conditions cited above pose a problem for the typical installation of Vapor SentinelTM Vapor Barrier, please contact Vapor Products Group for additional information and solutions. per 24 hours as measured by the Anhydrous CalciumLowes recommends installing a plastic vapor barrier behind the backer board in addition to a paint-on barrier between backer and tile. Seal the edges of these cut areas with a sealant. $29. It is resistant to mold and mildew, but it doesn’t provide a complete waterproof barrier in damp environments. 2 1 3Look for a tape that is specifically designed for vapor barrier installation, as it will provide the best adhesion and durability. The recycled fiber construction adds extra insulation and cushioning to make both residents, and downstairs neighbors happy!. The vapor barrier must be installed on the outside (or warm side) of the. Air Permeability ASTM. A quality air and vapor barrier membrane helps create an efficient exterior wall system by preventing air, and any accompanying moisture, from infiltrating the structure’s interior. The US Department of Energy recognizes all three, but. WARNING: Do not install your dehumidifier in a corrosive environment. INSTALLATION SUB-SLAB: Vapor Sentinel TM 10-Mil Vapor Barrier is unrolled over an aggregate, sand, or tamped base. 00 / piece Size: 194sqft. SENTINEL® Universal Sealant is a moisture cured, polyether, elastomeric sealant for use in approved SENTINEL® PVC membrane and flashing assemblies. They are installed on top of cement backerboard, which is over the studs. It is generally priced somewhere between foam and cork, but cheaper options can be quite thin and give. Efficient and flexible installation. 00 / piece Size: 194sqft. 7(1). When it comes to metal buildings, insulation addresses two important goals— stabilizing the structure’s interior temperature and preventing moisture from entering or collecting via condensation. Watch our video for a step-by-step guide on how to install Pango Wrap Termite/Vapor Barrier. SENTINEL® PVC Roof Systems. 1 perms but less than or equal to 1. 100 sq. Improve this answer. Types: 30-pound asphalt-coated paper, bitumen-coated kraft paper, plywood, vapor retarder latex paint 0. The. Apply via mechanically fastening. Vapor barriers are usually made of plastic. We used Farm Supply brand 6 mil reinforced string solid white vapor barrier, Blue Summit vapor barrier seam tape, and Zip System flashing tape for this insta. $72. BEST BANG FOR THE BUCK: BestLaminate Blue Vapor 3-In-1 Flooring Underlayment. SENTINEL® P150 SKU: P302, P308. Felt: Denser than foam, offering more sound insulation, and some options can have an attached vapor barrier. (888) 355-1522. All seams overlap aSentinel Moisture Barrier Polyethylene Film. x 50ft. 0 onto the roof surface and allow to relax. Vapor Sentinel Vapor Barrier SAFETY SHEET MANUFACTURER Vapor Products Group W51N535 Struck Lane Cedarburg, WI 53012 USA (888) 355-1522. With a simplified installation process, the New Construction System saves installation time and costs. If any of the conditions cited above pose a problem for the typical installation of Vapor SentinelTM Vapor Barrier, please contact Vapor Products Group for additional information and solutions. Secure the edges of the vapor barrier to the concrete using tape or staples. 6 out of 5 stars 1,063Geo Forward specializes in designing these systems for commercial and residential projects. Application Firestone V-Force™ Vapor Barrier Membrane can be installed at temperatures as low as -4 °C provided that it has been stored in a heated area so that it will be at a temperature between 10°C and 35 °C during application. PANGO® WRAP TERMITE/VAPOR BARRIER INSTALLATION INSTRUCTIONS P3 of 3 BEAST® CONCRETE ACCESSORIES - VAPOR BARRIER SAFE BEAST ® HOOK is a faster, easier way to set 2x4 overhead screeds. We’re also a leading provider of. 99 / piece Size: 100sqft. Sentinel Moisture Barrier is a polyethylene film that provides a barrier for moisture protection over cement slabs. Unroll the vapor barrier material. The cost of strong vinyl tape for securing plastic at the edges and for taping sheeting. When rolling out the moisture barrier you want to go from wall to wall and cover the entire floor. SKU: 100893247. 99 / piece Size: 120sqft. GenFlex Vapor Shield Membrane must be installed with minimum 3" (76 mm) side laps and 6" (152 mm) end laps. Vapor Sentinel New Construction Systems eliminate the need for costly trenching and aggregate backfill with its stronger-than-concreate gas-permeable layer. A.