sentinel vapor barrier installation. They are installed on top of cement backerboard, which is over the studs. sentinel vapor barrier installation

 
 They are installed on top of cement backerboard, which is over the studssentinel vapor barrier installation  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 floor install over time

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. SOPRALENE 180 SP 3. In the following example, we’ll use a 12 mil crawl space vapor barrier. $29. GUIDE SPECIFICATION. Pull the barrier tight to prevent air leaks. $24. EZ Foam Underlayment. 5 square feet. SKU. It’s worth noting that the thicker material your vapor barrier has, the more costly it will be. The cost of a vapor barrier installation ranges from $2 to $4 per square foot or $1,200 to $4,000 in supplies and labor. How to Install a Vapor Barrier on a Concrete Floor 1. 100sqft 5. All of our PVC membrane products offer superior weldability and the proven fire and chemical resistance of PVC. SOPRASEAL Stick 1100T is a self-adhered waterproofing membrane. For example, a basic vapor barrier will not provide extra padding. 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. 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. If required, the system can easily be activated to enhance mitigation and monitor soil gas concentrations after. Viper VaporCheck II (Viper II) is the first line of defense against damaging water vapor and soil gas threats existing below the concrete slab. Felt: Denser than foam, offering more sound insulation, and some options can have an attached vapor barrier. Sentinel Underlayment Installation Instructions. 00 for the materials (stakes for securing the. SOPRASOLIN HD is designed to waterproof around vents, chimneys,. The most obvious best practice is to install a sub-slab vapor barrier in the first place. We used Farm Supply brand 6 mil reinforced string solid white vapor barrier, Blue Summit vapor barrier seam tape, and Zip System. A wall system should have one vapour barrier, but can have many air barriers. A. Water can enter a basement or crawlspace in liquid form—through cracks in the walls, cracks in the slab, or the crack at the perimeter of the slab. 94 / piece Size: 100sqft. 7(2), including compliance with Table R702. 006 Film Barrier Installation Methods • Floating Floors For Use Under • Hard Surface Flooring. 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. $143. DUOTACK SPF HFO Adhesive is a low pressure, two-component spray polyurethane foam adhesive formulated for adhering SENTINEL HFB (heavy fleece back) membranes, insulation and coverboard to approved substrates. We used the Tyvek and it's worked well so far. Sentinel Premium Quiet Underlayment. 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. 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. $58. 00 / piece Size: 194sqft. 99 / piece Size: 120sqft. 2mm thick, available in 100 sq. Air & Vapor Barrier Laminated Boards; Air & Vapor Barriers. Before you begin installing your vapor barrier, it’s important to measure the dimensions of your basement floor. If required, the system can easily be. Installation. 99 / piece Size: 100sqft. It is generally priced somewhere between foam and cork, but cheaper options can be quite thin and give. Staple the vapor barrier material to the wood floor joists of your mobile home with a staple gun. We used 10mil vapor barrier, vapor barrier seam tape, and Zip System flashing tape for this installation. Apply Clear All Approximate Size Approximate Size 1000sqft 1. per 1000 sq. See other videos on how to install a vapor barrier to a foundation wall with no drilling or mechanical attachments. . Moreover, the Geo Forward team is an expert in barrier applications for subterranean parking garages, underground vaults, basements, and more. . Using a utility knife, cut the length long enough to wrap edges up the wall 3 - 4 inches. SENTINEL® Universal Sealant is a moisture cured, polyether, elastomeric sealant for use in approved SENTINEL® PVC membrane and flashing assemblies. Do not. You will want to overlap the vapor barrier equal to 2 inches or more on the wall. Installation. DUOTACK SPF ADHESIVE comes in a kit containing both the A & B. Sentinel Eco Underlayment. SKU: 100586833. Engineered to be re-used over and over again for maximum value. Eco Ultra Quiet Premium Acoustical Underlayment. 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. To properly install a vapor barrier into your basement's concrete floor, follow the steps below: Choose a vapor barrier/retarder. 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. Throughout most of the year, the pea gravel is damp. You will be able to grow healthy, strong plants in your greenhouse by keeping mold, mildew, rot, and water damage at bay. 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 floor install over time. ft. Sentinel Eco Underlayment. For example, a basic vapor barrier will not provide extra padding. Step 3: Measure and cut the vapor barrier. This basement vapor barrier will also prevent radon gas from penetrating the slab, an added benefit. By sealing off the crawl space, the. First introduced in the U. Air & Vapor Barrier Laminated Boards; Air & Vapor Barriers. 11 Step-by-step Guidelines on How to Install Vapor Barrier in Basement Floor Step 1: Measure the Basement Floor. $143. barrier installation. 120sqft 1. A durable barrier system that saves on your bottom line. FEATURES & BENEFITS MOISTURE PROTECTION The Vapor Sentinel New Construction System protects your new construction projects from hazardous soil vapors without the need for trenching or aggregate backfill. Installation Guide 3M™ Air and Vapor Barrier 3015NP 1 Prepare the wall. 200sqft 1. Installation of Stagestep Vapor BarrierStep Seven: Insulate the Bond. 100sqft 5. 2. At the end of each roll, install a 6" x 42" (152 mm x 1. Also, a special type of tape seals all of the seams between the sheets of vapor barrier. 99 / piece Size: 120sqft. installation process, the New Construction System saves installation time and costs. Get tips on working on flooring under various types of conditions with help from a foreman for Lighty Contractors in this free video series. HELPS REDUCE NOISE. Thus, sealing air leaks is about 50 times as important as installing a vapor barrier. Keeps moisture out; For use under all floating flooring; Includes an adhesive strip for overlap;. Press down firmly as you apply the tape. Quantity of pieces. The material is stapled to the frame of a basement wall before it is finished with plaster or. 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. Seal all. 00 / piece Size: 194sqft. MoistureBlock™ is a low-density polyethylene film that can be used during the installation process where additional moisture protection is needed. 99 / piece Size: 120sqft. 85-ft x 1. 100sqft 5. Refer to SOPREMA® specifications and installation instructions for additional. When I said I wanted to seal the edges of vapor barrier, they told me to use the Tyvek tape, the same one you found. SENTINEL® P200 HFB is a high performance, polyester reinforced, thermoplastic polyvinyl chloride (PVC) roof membrane, specially designed to provide unmatched flexibility and long-term performance. It is a myth that installing vapor barriers is the most important step for controlling. SDS. 200sqft 1. Moisture/Vapor Barrier Underlayment . 30in. Vapor Barrier Installation Basics. Concrete, however, is, in fact, a porous material. Air & Vapor Barrier Laminated Boards; Air & Vapor Barriers. Without a vapor barrier, moisture seeps in from the ground, gradually saturating the crawl space. Tips for concrete floor vapor barrier installation: 1. Lift the cut polyethylene edge and tap down one side at a time with wide, waterproof tape. Use more butyl tape to secure the bottom of the vapor sheet. Order the Best Underlayment Installation Materials. SOPREMA provides high-performance thermoplastic polyvinyl chloride (PVC) roofing membrane in multiple options. Concrete walls should have any void areas filled and any fins, mortar joints or screws should be flush with the wall. Vapor barrier material costs: The cost of 6 mil plastic sheeting ideal for use as a vapor barrier costs just $0. But I would look into converting the crawl space to a closed, conditioned, and DRY space. Sentinel Moisture Barrier Polyethylene Film. Vapor barriers are installed directly over the soil and secured with spikes. , 200 sq. 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. Safe. $58. Next cut out around the electrical boxes enough to allow you to once again use the tape to seal the poly to the vapour boxes. The following table summarizes the key differences between Class 1 and Class II vapor barriers: Installation and Maintenance: Proper installation of the vapor barrier is vital for its effectiveness. SENTINEL® Boot Flashing is a factory fabricated pipe flashing utilizing fiberglass reinforced pvc membrane. . Sloping the soil away from your home at about 1/2 in. Follow these steps to properly prepare the concrete surface: Clean the Concrete: Start by sweeping the concrete floor to remove any loose dirt, dust, or debris. 5 mm) Installation SENTINEL P150 HFB is applied to approved substrates via. 00 / piece Size: 194sqft. Page 6: Installation INSTALLATION The area to be controlled should be sealed with a vapor barrier. 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. . See installation instructions and warranty information for more guidance. SOPRA-TITE SENTINEL® Drip Edge combines custom engineering and superior performance with an attractive appearance. A crawl space vapor barrier costs $0. It explains that almost all contractors or remodelers will use and recommend 6-mil plastic sheeting as an affordable and effective vapor barrier. Firestone V-Force Vapor Barrier Membrane is a vapor barrier comprised of SBS modified bitumen adhesive, factory-. 15 mil Yellow Guard Vapor Barrier. 99 / piece Size: 100sqft. Install 3M™ Air and Vapour Barrier 3015 vertically or horizontally. The difference between air barriers and vapour barriers: The job of a vapour barrier is to prevent vapour diffusion and the job of an air barrier is to stop air leakage through differences in air pressure between inside and out. $143. As this article states, walls in Zone 5 need a vapor retarder, but there is no reason -- neither a building code reason nor a building science reason -- to install a vapor barrier on the interior side of your walls. Also apply adhesive around all locations where you cut holes in the plastic. 00 at one of the big hardware stores. Make sure this fits by entering your model number. Vapor barriers are both. The lower the perm rate, the better for slabs. Air & Vapor Barrier Laminated Boards. Unroll and cut vapor barrier. Here’s an overview of the steps we take to fix the problem: Wood and organic materials are removed. Seal Stego Wrap along all terminating. The crawl space in our newly purchased home of 8 months did not fare up to the recent historic freeze. • Do-it-all underlayment provides complete moisture and vapor protection for all flooring types in floating installations. Order the Best Underlayment Installation Materials. Moisture tends to migrate from areas of greater (or warmer) concentrations into areas of lesser (or colder) concentrations. 2. Charlie. As a second line of defense, the system allows for simple and easy mitigation system installation if the need arises. By using a vapor barrier, builders can help to prevent these problems. Documents To. Seal Stego Wrap along all terminating. 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. CLOSEprovide technical assistance regarding the utility of a specific installation practice or Stego product, they are not authorized to make final design decisions. Installation Method Mechanically Fastened Reinforcement Polyester Thickness 60 mils (1. Its solution was STEGO CRETE CLAW. BEST BANG FOR THE BUCK: BestLaminate Blue Vapor 3-In-1 Flooring Underlayment. $58. Prior to installation, unroll SOPRALENE Flam 180 onto the roof surface and allow to relax. Electrical Conduits – install two (2) 1” schedule 40 PVC conduits to the rear of the sentinel barrier. Moisture can cause serious problems in homes, including rot, mold, and mildew. Its excellent R-value helps keep the floor more comfortable. View Specifications. 99 / piece Size: 120sqft. A basement vapor or moisture barrier is installed during the new construction of a home or the remodeling of a basement. 70 per square foot. 4. First, gather the materials necessary for the installation, such as plastic sheeting, tape, and a staple gun. vapor intrusion is most likely to be a problem. $29. Blue Summit Supplies Vapor Barrier Tape, PE 9mm Polyethylene Tape Sealing Moisture Barrier Seam and Seal Tape for Crawl Space or Marine Use, Waterproof White 9 Mil Poly Tape, 3. Easy installation: They are typically available in rolls, making them easy to handle and. Installing a moisture barrier under your new floor may be necessary, especially if it’s concrete. 99 / piece Size: 120sqft. 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. heights. Gaps from 1/4"–1/2" require caulk. SOPRASEAL STICK FLASHPRO a 17mil, self-adhesive, air and vapor barrier flashing membrane composed of a polymer-based adhesive and a tough, tri-laminated woven polyethylene facer. Eco Ultra Quiet Premium Acoustical Underlayment. Additionally, installation of a vapor barrier may help to contribute to LEED credits for buildings seeking to be certified under the U. Installation. The cool surface is the sheathing, assuming no exterior insulation. MoistureBlock™ 6-mil Vapor Barrier Flooring Underlayment. 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. 6 out of 5 stars 1,063Geo Forward specializes in designing these systems for commercial and residential projects. $72. You can use a six mil (0. 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. 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. Eco Ultra Quiet Premium Acoustical Underlayment. Exclusive to Floor and Decor, Sentinel Protect Plus Underlayment is premium underlayment designed specifically to be used with attached pad laminate, vinyl, & rigid core flooring. 99 / piece Size: 120sqft. Unroll 1st piece of vapor barrier along one edge of floor. At other times of the year,…Care must be taken if installing a vapor barrier to ensure it is installed on the warm side of the wall assembly to avoid condensation forming within the wall. Vapor Barrier. Known for our flagship Stego Wrap line of under-slab vapor barriers and retarders, Stego has earned the respect, trust, and recommendation of architectural, engineering, and construction communities. Apply Clear All Approximate Size Approximate Size 1000sqft 1. Sentinel Eco Underlayment. covering the floor area. Simple system activation. x 140 ft. If required, the system can easily be. (Source: Sentinel Pest) In Conclusion. SOPRA-TITE SENTINEL® Drip Edge. 1 mm (161 mils) APP (Atactic Polypropylene) modified bitumen roofing membrane for approved multi-ply membrane and flashing assemblies. Fluid/Liquid-Applied Air & Moisture Barriers. Fix any damage. Without these barriers, moisture can condense and turn into liquid within the walls, leading to rot and decay. 1 Spray foam plastic insulation for moisture control with Class II and III vapor retarders. per. Note that "mil" is a shorthand term used for a plastic. Although crawlspace vents were originally designed to facilitate humidity exchange with the outside air, they may contribute to mold and rot. Sentinel Moisture Barrier Polyethylene Film. Rocks are removed, and uneven surfaces are leveled by hand. . If. The three. While this can be a potentially laborious process, we’ve broken it down into 5 simple steps: Empty the garage. Air-Bloc 32MR is used in cavity wall construction to provide an air/vapor and. The Amerique sentinel basic vapor barrier is perfect for wood, bamboo and laminate floors. 150sqft 1. Sentinel 6mm Cork Underlayment Roll. DRAGO® WRAP VAPOR INTRUSION BARRIER INSTALLATION INSTRUCTIONS NOTE: While Drago Wrap installation instructions are based on ASTM E1643 - Standard Practice for Selection, Design, Installation, and Inspection of Water Vapor Retarders Used in Contact with Earth or Granular Fill Under Concrete Slabs, these instructions are meant to. and any wet area where waterproofing and vapor barrier is absolute necessary to protect your home from mold and mildew. Our MoistureBlock is a 6 mil polyethylene film vapor barrier that is used during the installation process with floating laminate, luxury vinyl planks and engineered wood floors. 00 / piece Size: 194sqft. Where Does Vapor Barrier Go in. For plaza or parking decks, below grade foundation walls, insulating concrete forms to garden roof systems, SOPREMA offers waterproofing solutions such as SBS-modified bitumen, liquid applied PMMA/PMA products and rubberized asphalt. Sentinel Premium Quiet Underlayment. Step 3: Is the Underlayment Folded? Sometimes the roll of vapor barrier will be folded up to three times over. Model: Sentinel HS35 Serial Number: Date of Purchase:. The plastic sometimes used on the warm-side of building walls (on the wall interior under drywall in northern climates) is a vapor barrier. Spec Note: This specification includes materials and installation procedures for Air-Bloc 32MR, an elastomeric non permeable, mold resistive air barrier membrane meeting the requirements of the Massachusetts Energy Code for the building envelope. Cut the sheets to size, allowing 6 inches or more along walls. If required, the system can easily be. A vapor barrier is intended to keep water vapor or water molecules from passing through the barrier. 5mm NuCore Stockbridge Oak Rigid Core Luxury Vinyl Plank -Cork Back looks and feels like wood and tile, but can be installed where real wood cannot. Eco Ultra Quiet Premium Acoustical Underlayment. We’re also a leading provider of roofing. For purposes of compliance with Tables. 3. ROBERTS® Silicone Moisture Barrier Underlayment is designed to protect floors from moisture, without trapping it underneath the floor covering. Any gaps greater than 1/2" requires backer rod and caulk. 400SQFT AMERIQUE Premium 3 mm Thick Flooring Underlayment Padding with Tape & Vapor Barrier 3 in 1 Heavy Duty Foam (400SF Total, 200SF/Roll), 400 sq. SOPRASOLIN HD is a multi-purpose self-adhered membrane composed of proprietary SBS-modified bitumen. BEST OVERALL: Roberts First Step Premium Underlayment. 1 +1 for the reference, even though most well logiced advice seems to point to the contrary. 03 Perms IMP score is the lowest barrier you should put down under residential concrete. , 6–15 mils) that are used to mitigate moisture transmission through concrete. Wipe dust from wall curtain prior to installing floor liner. 50 per square foot on average, depending on the thickness of the plastic, which ranges from 6 to 20 millimeters. 2] Cement Board Installed behind Tile and Panel. . Vapor barriers restrict the flow of water vapor (diffusion) through materials. Where to Install Vapor Barriers. Additional information: Main Area of Concern: Crawl Space. The exclusive Dri-Wick Technology of the fibrous structure features an antimicrobial fibers. 14 ft. x 25-7/16 ft. ft. 30in. SOPRALENE Stick is composed of a proprietary formulation of elastomeric styrene-butadiene-styrene (SBS) polymer modified bitumen in combination with a high tack self-adhesive layer and is reinforced with tough,. It doesn’t create a sealed, waterproof or moisture-proof space, and they are rarely fitted tightly against the foundation walls of a crawl space or any columns or piers under the house. $58. . 7(3) or Table R702. Buy from trusted and established brands like Sentinel ; The most affordable underlayment items;. The function of a vapor barrier is to retard the migration of water vapor. American Concrete Institute or AIC says that 10-mil poly or plastic with a 0. 3. Use the barrier seaming tape to repair and tighten up the damaged area around the pipe. Measure and cut a piece of the vapor barrier to cover the damaged area 6” in all directions. 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. PDS. CONTRACTORS/VOLUME BUYERS CALL 864. All conduit bends should avoid 90 degrees, if 90 degree bends are necessary only utilize a long sweep 90. 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. Calculate my square footage. ALSAN® RS 230 was chosen for waterproofing this international landmark because of the ease of installation in tight areas and short time schedule. Choose fasteners that are suitable for the material of your crawl space walls. Contact us today to schedule your FREE On-Site Inspection. Vapor 3-in-1 Underlayment Silver (100 sq. It is designed for use on all grades of the home or. The underside consists of a release film and a specially blended self-adhered bitumen layer. 200sqft 1. We recommend working from left to right. Air barriers restrict airflow (and the water attached) through a material. Air & Vapor Barrier Laminated Boards. 1 perms. This underlayment acts as a slipsheet to minimize dust and reduce noise. View SOPREMA documents including HPDs & EPDs, installation instructions, specifications and more. Order the Best Underlayment Installation Materials. If unit is installed in a crawlspace, all vents should be sealed. 120sqft 1. Sentinel Moisture Barrier Polyethylene. Using Vapor Sentinel system tape, seal to wall. Step 3: Seal the Perimeter. It inclused a 3″ overlap and self-adhesive strip to make installation even easier. $143. . A vapor barrier is a type of crawl space encapsulation material that specifically protects your crawl space and other areas of your property from water and moisture. The exception is when laminate flooring is being. Keep in mind, residential foundation characteristics can vary by region and project, but termination points usually include the perimeter of the slab placement area, like at a concrete stem or basement foundation wall. Seal or remove crawl space vents. Visit Stego Industries resources page for your projects. Learn how the work and why they're essential. If installing over concrete, the concrete must be dry with moisture emission rates that do not exceed 31 lbs. Winston-salem / High Point Location. Eco Ultra Quiet Premium Acoustical Underlayment. S. GREAT VALUE. 99 / piece Size: 120sqft. Cork is naturally antimicrobial, and polyethylene offers exceptional moisture resistance. $143. DUOTACK SPF HFO Adhesive was developed to provide a much quicker and easier application in order to save time and. Cut the polyethylene around each piece of wood using a sharp utility knife or scissors. They are installed on top of cement backerboard, which is over the studs. Vapor Barrier 4. Sentinel Eco Underlayment. 12 days without running water. Thoroughly mix. The patented design of the extruded aluminum anchor bar securely terminates the membrane, providing superior protection. These boards are resistant to water, moisture, and humidity and have good insulation properties. Sentinel Eco Underlayment. Finally, unroll the vapor barrier and press it firmly onto the concrete floor. ft. This 2-in-1 underlayment is a 2. floor during the manufacturing process. Class II – These vapor and moisture barriers are semi-permeable, allowing some moisture to pass through (greater than 0. Plywood floor sheathing is. INSTALLATION SUB-SLAB: Vapor Sentinel TM 20-Mil Vapor Barrier is unrolled over an aggregate, sand or tamped base. Make sure the subfloor is level, clean, dry, and structurally sound. There are two main ways to install a vapor barrier and it all depends on where you’re installing it. Roberts Black Jack has a 4″ attached overlap and adhesive strip to make installation a breeze. 25 ft. 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. I'm just a bit south of there in Indiana, so I presume that the advice is the same, particularly since this is a bathroom/closet installation. Installation. When vapor-laden air moves from one location to another, the vapor moves with it. SOUND REDUCTION: Reduces sound transfer, making the floor quieter in the home. Install the Vapor Barrier: Lay down the cut pieces of vapor barrier onto the concrete floor and press them into place with your hands. A proper vapor barrier installation can limit your liability. 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. 99 / piece Size: 120sqft. Sentinel Underlayment Installation Instructions Make sure the subfloor is level, clean, dry, and structurally sound. 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. If you need extra help, use a hammer and nails to secure it. Water damage to wood foundation & busted pipes. We needed air barriers not vapor barriers to control vapor flow. Because of these gaps, water vapor. Step 1.