By frequently running quality assurance and control tests, a manufacturer can ensure they continually deliver the expected level of performance –that whatever. A thicker barrier provides more protection for your home. Project Source. 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. 0031 inches thick, and unfaced expanded or extruded polystyrene. Next, to prevent cold air from entering the crawl space, install R30 Fiberglass insulation into the bond cavity. Any gaps greater than 1/2" requires backer rod and caulk. 15 mil thickness. mold proof and vapor-resistant; Installation on walls, showers, countertops, and tub surrounds; Lightweight but strong, easy to handle. 50 per square foot on average. Allows any accumulated moisture to either drain to the exterior or evaporate. 15 mil thickness. 49. 50 per square foot on average. BEST STANDARD FOAM: Roberts Serenity Foam Underlayment. Rated to no less than 3000 PSIG (20. It adds cushioning for extra comfort underfoot,. Following installation, each depressurization system was tested to ensure that it worked properly. New Construction. Vapor Barrier Installation Basics. Safe Handling Precautions Practice good housekeeping and personal hygiene and always wash hands after handling the product. x 60 ft. 6 lb. Staple the vapor barrier material to the wood floor joists of your mobile home with a staple gun. can be dangerous to handle without the proper equipment. For example, let’s say a single wide is 16 feet wide and 72 feet long so I would add: 72 + 72 + 16 + 16 + 12 + 12 = 200 feet. How did this project turn out? WATCH HERE: the easiest way to seal u. Another solution is the new VaporStake that seals to the vapor barrier and is then cut off and left in the slab. Vapor Barriers provide additional protection between the subflooring and flooring by preventing the emission of vapors and moisture to the inside of the home. Use a utility knife to cut the vapor barrier to size, if necessary. The built in moisture barrier protects your floor against harmful moisture vapor. Weekly Household Auction Terms & Conditions. Prices start at just over $2. Cellulose. In fact, it is advertised as 100% vinyl free flooring with no PVC. If a contractor is installing multiple vapor barriers, they will usually charge based on the overall thickness of the barrier. Vapor 3-in-1 Blue underlayment is the most budget friendly option of all vapor barrier underlayment. Refer to adhesive label for moisture limits of the adhesive. x 84T piece. 49. Vapor barriers in new home in North Okanagan, BC Canada. Flooring moisture barriers are placed beneath. , Silver Chrome (pack of 1) Easy installation with overlap and adhesive strip › See more product details Purchase your 6 mil vapor barrier from a local home improvement store or online retailer. Home Vapor Barriers: Removal, Replacement, and Cost Sentinel has been in the crawl. $34. View All Locations. In fact, it is almost a "perfect" vapor barrier. So that’s the background. No other materials are needed for install due to the Lip & Tape Design ensuring quick and easy install above, on or below grade. Barrier Seaming Tape is a low-permeance tape designed. . Use foam around ducting and other small & difficult cavities. 33-ft x 3. Air Barrier Installation Detail: Interior Air Barrier. Mix and liberally apply the epoxy 360 degrees around the penetration and at least two inches above the termite barrier. Synthetic fiber pads are fast becoming the most specified underlayment architects and designers due to their acoustical and moisture protection qualities. Sentinel Moisture Barrier is a polyethylene film that provides a barrier for moisture protection over cement slabs. A vapor barrier— also known as a. The Vapor Sentinel New Construction System protects your new construction projects from hazardous soil vapors without the need for trenching or aggregate backfill. Pango Wrap is a proven physical barrier against subterranean termites and moisture vapor. 3. The attached vapor barrier is specially designed for an optimal bond with adhesives for easy installation. This chart has some different shower construction materials and the listed perm ratings. Limited Time Only! 18-Month Special Financing Available 11/9/23 – 1/2/24. Barrier Seaming Tape is a low-permeance tape. A vapour barrier can act as a very. The basic vapor barriers we use here at The Crawlspace Ace are a thin sheet of black plastic, 6 mil thick, that spreads across the crawl space floor and overlaps at the seams. 2mm thick, available in 100 sq. Prices start at just over $2. Vapor Barriers. See installation instructions and warranty information for more guidance. 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. Tar Heel Basement Systems provides a vapor barrier installation for your crawl space with a 25-year warranty in North Carolina and Virginia. Now let’s get to the 4 types of shower waterproofing methods. 6 out of 5 stars 1,063Summary of Contents for Selkirk CF Sentinel. These include properly anchoring the barrier to prevent shifting, providing ventilation for potential radon gas, and periodically inspecting the vapor barrier for any damage or wear. 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. Or you might consider spray foam between the studs. A crawl space vapor barrier costs around $0. 83-ft x 6-mil Premium Poly Film Flooring Underlayment (100-sq ft / (Roll) Model # A64926. 84T Laminate Blade $46. Ask us anything about getting insulation with a vapor barrier at your home! Give us a call to set up your free consultation at (866) 692-5449 or contact us here. Gaps from 1/4"–1/2" require caulk. 70 per square foot, depending on the materials used during construction and the barrier thickness. Abstract. . How to Install a Vapor Barrier on a Concrete Floor 1. The Vapor Sentinel New Construction System is a solution for soil gas control to. 1209 Culbreth Dr. Vapor 3-in-1 Blue underlayment is the most budget friendly option of all vapor barrier underlayment. 4 mm Acoustical Underlayment with Vapor Barrier for All Vinyl Plank Flooring QuietWalk Luxury Vinyl is a 360 sq. Install a sump system if needed. RUNNER-UP: QuietWalk Plus QW100PLUS Underlayment. ft. Cover the dirt crawlspace with a plastic moisture polyethylene vapor barrier. Subscribe Now:. We are your trusted partners in new construction technology. Efficient Installation ; Proprietary Patented Technology ; Learn More. No more than 3 – 90 degree bends should be made for any sentinel wedge installation. 00 per sq/ft and rise to $4. Cut the sheets to size, allowing 6 inches or more along walls. Pre-fab units work well if you don't mind sticking with predetermined sizes and styles. Afterward, seal any leaks with a liquid caulk. Refer to SOPREMA® specifications and installation instructions for additional. Learn More. The use of vapor barriers in residential construction began in the 1950s as a way to protect homes from moisture damage. In most U. For example, a basic vapor barrier will not provide extra padding. Support our channel if you find our content valuable This video reveals how to make and install a 6 mil poly waterproof plasti. It rolls out and lies flat, with self-sealing seams making it simple to connect and form a continuous 6 mm vapor barrier between wood or. The humid air is indoors. It helps increase the life and appearance of your flooring. Blown into place dry or wet. The key point that needs to be made is that although air barriers are a good idea everywhere, vapor barriers are not. a. 4 mm (1 in. 2. 00 at one of the big hardware stores. Add vapor tape outside the plastic sheet to prevent moisture from entering. 0031 inches thick, and unfaced expanded or extruded polystyrene. We would like to show you a description here but the site won’t allow us. A 6 mm thick vapor barrier might cost about $0. This six-minute video provides everything you need to know to properly install Pango® Wrap Termite/Vapor Barrier below a concrete slab. Viper VaporCheck II (Viper II) is the first line of defense against damaging water vapor and soil gas threats existing below the. Seal all. For more information about this video or Fausfloor® products visit 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. 1. In homes with dirt basements, they poured a concrete floor or installed a vapor barrier. installation process, the New Construction System saves installation time and costs. Finally, unroll the vapor barrier and press it firmly onto the concrete floor. Non-toxic, zero VOC, recycled vapor barrier for hardwood flooring. See On. Some builders in desert climates ignore this advice, figuring. Example #1- Install the dehumidifier in the laundry room and duct it into the living room. Sentinel Underlayment Installation Instructions. Class I barriers don't allow any amount of moisture to get through. Size Of Your Project: Number of pieces. 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. 50 to $0. to 3⁄4-in. Basic Vapor Barrier Installation Instructions Step 1: Preparation Correct any drainage issues. In addition, you’ll need to buy tape to secure the vapor barrier, which usually costs around $50 for a 4-inch-by-180-foot. 1 +1 for the reference, even though most well logiced advice seems to point to the contrary. However, foam insulation has higher R-values and forms an air barrier, which can eliminate some of the other costs and tasks associated with weatherizing a home, such as caulking, applying housewrap and vapor barrier, and taping joints. We used 10mil vapor barrier, vapor barrier seam tape, and Zip System flashing tape for this installation. Air barriers can be either vapor permeable (allowing water vapor to pass through) or vapor impermeable. To DIY-install a vapor barrier into crawl spaces, clean the space, layer butyl tape with a plastic vapor sheet, then pull the sheet to the bottom of the space. When rolling out the moisture barrier you want to go from wall to wall and cover the entire floor. Vapor Sentinel provides the latest in remote telemetric monitoring technology to provide around-the-clock data collection and reporting. This barrier is around 10 to 20 millimeters thick and catches water and moisture seeping through your concrete, channeling it downwards to a connected drain. Dimensions: 14 ft. First I want to clear up the common confusion between “vapor barriers” and “air barriers. Vapor Sentinel New Construction Systems eliminate the need for costly trenching and aggregate backfill with its stronger-than-concreate gas-permeable layer. At other times of the year,…We would like to show you a description here but the site won’t allow us. 85-ft x 1. The Silence Sentinel® Basic may be set on a desktop, mounted on a wall or option-Air barriers restrict airflow (and the water attached) through a material. . 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. The result is a system that effectively stops, collects, and exhausts radon. • Do-it-all underlayment provides complete moisture and vapor protection for all flooring types in floating installations. Step 1. Large Blowing Machines. Contact today for a FREE cost estimate from your l. So refer to the manual of the flooring product you're installing. Topside. The Institute for Research in Construction (IRC) at the National Research Council (NRC) lists the five basic requirements for an effective air barrier as being: 1. Ideal for for all flooring ranging from concrete slab, bamboo, floating and wood floors, or even laminates engineered hardwood! In addition to the basic steps, there are a few additional considerations for a successful vapor barrier installation. OptiMax sells for $3. CALI. Check with the flooring company and your contractor to make sure you have an appropriate vapor barrier, if one is required. Where it is located in an assembly and its permeability is a function of climate, the characteristics of the materials that comprise the assembly and the interior conditions. The vapor barrier blocks moisture from entering the crawl space and prevents water damage from developing in the area. Synthetic fiber pads are fast. Section 2 Hydraulic line Conduit – install one 3” Schedule 40 PVT conduit to the rear of the Sentinel Barrier. Gather Your Materials. Step 4: Attach the vapor barrier to the walls. All bidding is online. Shop Products We Install. 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. 4b); or, Pango Claw, Pango. Contact us. Air barriers can be either vapor permeable (allowing water vapor to pass through) or vapor impermeable. Installing an effective vapor barrier is only for experienced DIY experts. To this point, it’s clear that a vapor barrier is crucial for a home’s safety because it controls the movement of moisture in and out of a building’s walls. . Seal all wall cracks and holes in the wall being vapor-proofed to block air gaps. (xiv) Before the application of jacketing all insulated surface shall be sealed with vapor barrier sheet. Insulate, foil vapor barrier and tape the seams well. This sub-floor barrier slows moisture migration and helps prevent buckling, cupping, and cracking. Laminate. Surround the pipe with textured double-sided tape to help anchor the epoxy, ensuring a tight seal. Using hand pressure, lightly apply the exposed adhesive surface to the substrate and check for proper alignment. Get tips on working on flooring under various types of conditions with help. When all layers above the V-Force. ft. IMPORTANT: ALL PENETRATIONS MUST BE SEALED. If any of the conditions cited above pose a problem for the typical installation of Vapor SentinelTM Vapor Barrier,. The cool surface is the sheathing, assuming no exterior insulation. Never install a basement vapor barrier because it can cause mold to grow and spread. See installation instructions and warranty information for more guidance. Basement Systems offers professional crawl space encapsulation and repair solutions in Elizabethton, TN, including vapor barrier installation, sump pumps, and jack supports. Tile Alternatives . VaporBlock® is a high-performance, under-slab vapor barrier designed to retard moisture migration through concrete slabs and walls to protect your structures from mold, mildews and fungi. The. Mold and mildew growth. 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. Class III. First, debris in your crawl space needs to be cleared out before installing a vapor barrier. Consequently, a vapor retarder in a roof assembly is also acting as an air barrier. This 500 sq. By Mark Robins. x 84T piece Add to Cart. And, the barrier is made for good value, is made for easy installation with overlap and it is affordable. Sentinel 10in. BEST BANG FOR THE BUCK: BestLaminate Blue Vapor 3-In-1 Flooring Underlayment. A well-designed ASD system consists of a soil gas collector, a vapor barrier (also commonly referred to as a “soil-gas retarder”), piping, and a specially designed radon fan to depressurize the soil beneath the slab or under the soil-gas retarder in a crawl space. Economical mitigation strategy. If you just need a basic, serviceable shower, pre-fabricated shower units made of acrylic or fiberglass install quickly, are usually reasonably priced, and have no installation waiting periods. Once your subfloor is inspected, repaired, and prepared, you are ready to start your installation. ROBERTS First Step Premium Underlayment - 630 sq. Seal the edges of these cut areas with a sealant. 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. 1. 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. easy installation with self - adhesive strip. Vapor barrier installation could cost anywhere from $1,200 to $4,000 on average. The most important thing to remember when installing a vapor barrier is to make sure that it is airtight. But mfr. Review product technical data and expiration dates and proceed accordingly. 5 meters) from the barriers. $132. Advertisement. Crawlspace Challenges for the Southeast. ExoAir 130 is typically applied to exterior sheathing panels, concrete block, poured concrete or wood substrates as an air and vapor barrier material. Less risk, less cost, and more data collection for your peace of mind. Dimensions: 14 ft. e. installation of vapor retarders. Unfaced fiberglass or Roxul (rock wool) is also acceptable if you already have 2 in. 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. Step 3: Measure and cut the 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. . 3in1 Blue Vapor Barrier Underlayment is universal and affordable. 85-ft x 1. Manufacturers offer a bevy of options, such as roll-down plastic or felt sheets, paint-on coatings, and moisture-inhibiting. If required, the system can easily be. 49. Now, measure and cut a high-quality vapor barrier to fit the crawl space and allow several inches to run along the walls. The higher the rating, the more effective at limiting sound. Viper VaporCheck II (Viper II) is the first line of defense against damaging water vapor and soil gas threats existing below the concrete slab. Find My Store. BEST FOR SOUND INSULATION: Roberts 70-193A Super Felt. Before installing the systems in 2007, EPA sealed cracks in basement walls and floors, and covered sump pits. Also this product is the exact same as. Use the barrier seaming tape to repair and tighten up the damaged area around the pipe. Air Control can be managed at the deck level of the roof, which more readily can be married into the wall air barrier. We use high performance plastic sheeting products used in everyday construction, industrial, and agricultural applications. A vapor barrier basically helps to prevent moisture from entering your home through the. Vapor Barrier Installation. And the membrane on the "bottom" is also a vapor barrier. Unroll one width of the 2in1 Vapor Underlayment. Attic Knee Wall Interface. climates, vapor barriers, or -- more accurately -- vapor diffusion retarders (vapor retarders), should be part of a moisture control strategy for a home. Efficient and flexible installation. SOPRASEAL LM 202 VP is a one-component spray applied vapor-permeable air barrier membrane used in wall construction. 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. PolyFoam PF080400100 Basic. 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. For those with vapor barrier installation experience, the following may be review, but as. Although crawlspace vents were originally designed to facilitate humidity exchange with the outside air, they may contribute to mold. Overlap any seams and tape them. BEST. Please visit the DiamondBack™ Product Page for more details. 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. When rolling out the moisture barrier you want to go from wall to wall and cover the entire floor. Roll - 40" x 189' x 2 mm. 00 Perms IMP. In homes with dirt basements, they poured a concrete floor or installed a vapor barrier. Water vapor can enter a basement or crawlspace by evaporating from the interior surface of a damp wall or slab. Air & Vapor Barrier Laminated Boards; Air & Vapor Barriers. 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. Your. For holes in our vapor barrier to be an advection concern, we need both: 1. * Common home footprints have 6 - 12 corners; complex home footprints have 12+ corners. The vapor barrier lines the ground and walls within the crawl space and prevents moisture from entering. A vapor barrier is a plastic liner placed on the crawl space floor, and sometimes the walls, that blocks outside moisture from entering the crawl space. , how much we stop or let. The installation process of SENTINEL CEMENT FOAM BOARD involves cutting it into the required size,. Vapor Barrier Vapor Barriers provide. GREAT MOISTURE PROTECTION. Attach the snap hooks to each quick link. Fold over the extra inch on each side to form a stapling flange. MOISTURE PROTECTION: Helps prevent mold, mildew, and other issues related. resistant with good insulation properties. SKU: 100586825. The complete mobile home skirting guide. Insulation. S. Basic Concepts of Vapor Retarder Design 6 . Afterward, seal any leaks with a liquid caulk. 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. The function of a vapor barrier is to retard the migration of water vapor. Step #3: Installing Vapor Barrier and Insulation – When we have the correct fitting for your vapor. 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. 15 to $0. Conceptually, the ‘air/vapor barrier’ was a material purported to address both air infiltration and vapor diffusion issues. Sentinel adhesive primer acts as a vapor reducing moisture barrier. SOUND REDUCTION: Reduces sound transfer, making the floor quieter in the home. Atticare is a top-rated and fully licensed insulation contractor. for your project we recommend adding an extra 10% to cover necessary cuts and accidental breaks or spills during installation. 5-mm Premium Cushion Flooring Underlayment (100-sq ft /Fan fold) Model # 1102002500. Membrane vapor barriers are made of rubber or foil and are adhered to the surface with an adhesive. Color: yellow. ft. Manuals may also be downloaded from our web site. The vapor barrier is a thin layer of plastic installed on top of the wooden frame enclosing most wine cellar applications. Air barrier materials can also be provided with properties which also class them as vapor barriers. GREAT VALUE. 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. ft. ft rolls. Press down firmly as you apply the tape. In Joseph Lstiburek's "Top Ten List of Dumb Things To Do In The South", he says that all brick should have a vapor barrier drainage plane. A durable barrier system that saves on your bottom line. Center seaming tape over small hole (s) or slice (s) in the vapor barrier. Class II – These vapor and moisture barriers are semi-permeable, allowing some moisture to pass through (greater than 0. Once your first row is complete, start on the next row. ) sheet of gypsum board sheathing. The average installation time for a complete basement vapor barrier system is 1-2 days, depending on the size of the basement, the extent of any damage, and other necessary repairs. VB15. How Much Does It Cost to Install a Vapor Barrier? Depending on the thickness of the plastic, which ranges from 6 to 20 millimeters, a crawl space vapor barrier costs $0. These can be as affordable and flexible as a sheet of plastic or as expensive and rigid as a sheet of glass. 10 Mil DiamondBack™ Seamless. It is ideal for use with laminate flooring with pre-attached underlayment. Fold the release film back on to itself carefully, leaving approximately 6" exposed. Source. Example #2- Install the dehumidifier in your crawl space with the remote mounted in your garage. premium recycled fiber underlayment built for luxury vinyl plank, luxury vinyl tile and multi-layer flooring. Extend Vapor Sentinel 10-Mil Vapor Barrier up the foundation wall. Beginning at one side of the crawl space, lay down 6-mil or thicker polyethylene plastic over the entire crawl space. ASTM E283. Sentinel Moisture Barrier is a polyethylene film that provides a barrier for moisture. Re-grade Soil to Direct Water into Drainage System. Throughout this post, we’ll explain the step-by. Vapor barriers are affixed via specialized tape that costs around $50 for a 4-inch-by. Sentinel Premium Quiet Underlayment. A single roll of black 6mm vapor barrier (10×100) covering 1,000 square feet will cost approximately $70. Use more butyl tape to secure the bottom of the vapor sheet. See On Amazon. What is a Vapor Barrier? A vapor barrier is an impermeable membrane primarily used to resist water vapor transmissionMoisture related problems in building enclosures have three root causes: 1) external sources of moisture; 2) internal sources of moisture; and 3) construction moisture that is present in materials (e. If project specifications call for. Premium vapor barrier. x 1. Average costs and comments from CostHelper's team of professional journalists and community of users. 49. B. We’re proud to serve customers in the San Francisco Bay Area, Los Angeles and New Jersey. In most cases, you will not want to use a vapor-barrier-type underlayment when installing laminates on a standard plywood subfloor, because wood is a natural material that needs to breathe. Tailor a versatile blowing machine to your needs, and let it work for you for years and decades to come. 600Sqft AMERIQUE Premium 3 Mm Thick Flooring Underlayment Padding with Tape & Vapor Barrier 3 in 1 Heavy Duty Foam (600SF Total, 200SF/Roll), 600 Sq. MoistureBlock™ is a low-density polyethylene film that can be used during the installation process where additional moisture protection is needed. x 60 ft. Dekorman’s Sound and Moisture Barrier Foam Underlayment (200 sq. Using Vapor Sentinel system tape, seal to wall. The bidding for this auction will close on Tuesday on the specified close date starting at 2:00 PM or 7:00 PM. Step Eight: Installing Vapor Barrier Liner. The basic answer is no, but you might want it anyway. Installation Guide 3M™ Air and Vapor Barrier 3015NP 1 Prepare the wall. BEST BANG FOR THE BUCK: Bestlaminate 3 in 1 Flooring Underlayment. Cut the felt as long as the stud bays, but about 2 in. Vapor barrier may be installed I think. The plastic sometimes used on the warm-side of building walls (on the wall interior under drywall in northern climates) is a vapor barrier. Seal Stego Wrap along all terminating. A vapour barrier can easily be realised with a plastic foil like Polythene (at least 0. This basement vapor barrier will also prevent radon gas from penetrating the slab, an added benefit. Best Practice Installation Techniques. This 2-in-1 underlayment is a 2. These simple barriers are very important components in crawl space encapsulation and have a huge impact on the health and wellbeing of a property once they are installed, preventing dampness, humidity, and even pest infestation. Installation:Floating, Glue-Down and Nail-Down Flooring Delta Rating: 22 Thermal. View Specifications. 6 mil reinforced vapor barrier. Crawlspace Challenges for the Southeast. This heavy duty 60 yard roll of moisture resistant crawl space vapor barrier seam and seal tape is highly durable, waterproof and weatherproof. 2in1 Underlayment comes in rolls and has an overlap on one side of the roll. Its excellent R-value helps keep the floor more comfortable. The site occasionally offers a line or two at clearance prices of $3. The caveat is that the vapor. . 12 (8 to 12 cents) per square foot. A vapor retarder is defined as a material or system that adequately retards the transmission of water vapor under specific conditions. STC ratings determine airborne noises and IIC ratings measure the impactful sounds, such as. 2910 Griffith Rd.