Creating holes for windows. Panjiva uses over 30 international data sources to help you find qualified vendors of South Korean wrap. You can apply clips over the entire greenhouse or only in certain spots, as long as the plastic is kept taut. Top Importer. po no. :. Oks Poly Co. A lot of builders like the Zip system a lot because it eliminates what has always been a troublesome step in. Lassiter, col. 0-inch staples when installing Tyvek over foam sheathing. ft. Spring Locks. Owens Corning19 Fiberglass Blown-In Insulation Sound Barrier 110. 3. 30. So here's a little known fact that most HVAC installers won't tell a potential new client for central air; Polyethylene vapor barriers in combination with air conditioning in homes can rot walls because of the condensation they may cause. 10050. with information about suppliers, customers, products purchased and sold, quantities, prices and supply chain networks. Ensure proper installation for a weatherproof and energy. Made especially for the DIY and restyling enthusiasts, our interior vinyl wraps will give you the ability to personalize your home at a fraction of the cost other shops offer. The wall will need to be able to dry to the inside on occasion. - Specially designed for nursery production. Polyethylene 100 shipments. At an inside corner, use a straight board to hold the felt tight to the corner as you staple. This how-to demonstrates the easiest method for skirt construction, using a Tyvek rectangle in a simple “wrap” style that some liken to a sarong. Buyers scott lumber packaging; POLs malmo PODs —— Supply area Philippines Purchas area United States; Weight 20830kg Amount 416600; Hs code 392190 Product tags lumber wrap,pe tarpaulin; Product description PE TARPAULIN 97GSM PE WHITE/TAN LUMBER WRAP ; Trade date 2023/10/15 B/L No. Tyvek looks like plastic and I think that why some don't think it is insignificant. 1/4 teaspoon instant yeast. Install windows to the shed (optional). PO NO. Oakes Farms operates its growing and farming divisions in a manner that respects the long-term health and well-being of the environment, the land, our partners and the community. The world's leading house wrap has the optimum combination of properties to deliver the best balance of weather protection, moisture management and, durability behind residential facades. A 121-unit housing complex in Riverside’s Casa Blanca neighborhood that would have risen next to the railroad tracks has been rejected. . United States. Finally, use an insulating foil tape to tape across any seams in the sheeting and across the staples. , updated weekly since 2007. In his paper, “Inward Drive – Outward Drying,” building scientist Joseph Lstiburek identifies the “sweet spot” for the permeance of the house wrap layer as between 10 and 20 perms. A smarter approach to air and vapor control. Iknow that it will last for a very long time. Plastic House Wrap The advent of plastic house wrap technology has reduced infiltration of outside air into the average home by 10% to 50%, helping to drastically reduce the energy required to heat or cool the home. 1. The advantages are plenty here – panels are between 4. 42/Tuesday, March 3, 2020/Notices 1 See Polyethylene Terephthalate Sheet from the Republic of Korea, Mexico, and the Sultanate of Oman: Initiation of Less-Than-Fair-Value Investigations, 84 FR 44854 (August 27, 2019) (Initiation Notice). Housewrap or tar paper (I still prefer tar paper) on the outside of the sheathing. A woven, extrusion coated polypropylene fabric containing micro perforations engineered to serve as an air and wind infiltration, moisture protection. 1415 posts · Joined 2010. HomeWrap Type: Nonwoven polyolefin Perm rating: 50. Just gun it onto the sheathing & the bare pine rough opening and tool it out with a plastic trowel. , a supplier based in South Korea. Lumber Packaging. manufacturers and suppliers of housewrap fabric from around the world. Lumberwrap 115 shipments. , Ltd. This is more than a marketing tagline, it is a core belief and a founding principle in the way we do business. Materials with lower perm ratings are better at stopping the movement of water vapor. Ajinpolymer Co . The house wrap industry solved this issue by adding vapor permeability to the design of the air- and water-resistant house wrap. South Korean manufacturers and suppliers of lumber wrap from around the world. Typar is best by far. or some other wrap or. It combines the benefits of housewraps and drainwraps. Hans Intech. 2) Caulking must be placed between the layers of house wrap at all vertical seams. Oks Poly's full import history & supplier list. GreenGuard MAX™ is Kingspan's most popular house wrap that offers high building wrap performance. Hopefully this helped you answer the question. China Factory : Haibin Industrial Zone Jiaonan City, Qingdao China. The builder has to identify the water-resistive barrier (WRB). 2K+ bought in past month. House wrap helps protect the conditioned air in your house, leading to lowered utility costs. After applying a weather-resistant barrier (whether you choose asphalt felt, building paper, or plastic house wrap), you need to choose a pattern for layering the wooden pieces onto your home. South Korean manufacturers and suppliers of housewrap from around the world. House wrap is designed to protect the home against rain, sleet, snow, and any other type of moisture that may seep through the exterior siding. I am jacking the house off the foundation and installing EPDM between the sill and the foundation. ,LTD. Liquid-applied WRBs come in a bucket and are applied to wall sheathing. Since there is no place in the world that has perfect humidity, 70*F temperatures, partly cloudy days, and no mold spores, put that house wrap on your shed as soon as you can. Renewables Wind/Solar. INSULATION AND WEATHERPROOFING. US Customs records available for Scott Lumber Packaging in Kirkland. Overseas Sales. Even if you have an air barrier on the outside of your building, if. 0 perms and less than or equal to 10 perms. 0 perms · Kraft paper coated with bitumen · Interior plywood · 30 lb. Watairvent® Furring Strips are manufactured from a mold resistant non-absorptive composite material, and their dual vertical and horizontal channels. A water-resistive barrier (WRB) provides protection against water damage. MANILA, Philippines — The House of Representatives approved on Wednesday a measure seeking the gradual phaseout and ban on single-use plastic products. 4k shipments total ITEM CODE HWWX-65-108 PO 26405 DESCRIPTION 65 GSM, 8X8 NON PERFORATED HOUSEWRAP. , updated weekly since 2007. #5 · Feb 4, 2012. Today there are many vapor permeable house wraps to choose from, including perforated; however, the quality is not all the same. Vapor semi-impermeable: 1. Completed in 2017 in Khwaeng Bang Wa, Thailand. 5. Date Supplier Customer Details 43 more fields 2022-05-10 Oks Poly Co. Stinger StaplePac only. HOMEGUARD BUILDING PRODUCTS 5430 SHAWLAND ROAD Savannah, Georgia Arrival Port: MOTU6717539 [1] 23 pcs. So far I have installed an interior curtain drain out to daylight. for pricing and availability. ,Ltd. ,LTD. Materials with lower. Last Record. In a remodeling situation,. PE COATED WOVEN FABRIC (WOVEN HOUSE WRAP). Tape over the side jambs. 7-sq ft Unfaced Stone Wool Batt Insulation Individual Pack. A minimum 0. Find the right Building Supplies on sale to help complete your home improvement project. and a means of draining to the exterior water that penetrates the exterior cladding. , ltd. The average cost to install house wrap ranges from about $0. $14. Building and Construction . manufacturers and suppliers of housewrap fabric from around the world. A high-quality perforated house wrap meets or exceeds the International Building Codes. from the furring down-. 1t63PWQ . ,Ltd. HomeGuard House wrap is a high-quality low cost solution for preventing air leakage, controlling drafts, improving indoor air quality, and protecting wall systems from water and moisture damage. 2023-09-15. 9 ft. Customs and import BOL records filed by oks poly co l t d via CBP. I talked with another insulation guy that. , Ltd. 5, to deny the request of a developer who was appealing the planning commission’s earlier rejection of the proposal. shipments available for Oks Poly Co. 1 1/2” DOW XPS 1 layer 30. based in Korea South. HomeGuard house wrap is an engineered, woven, polyolefin material designed for use as a secondary weather resistive barrier. 75 ft. Perforated plastic house wrap is at the bottom of the list in my opinion. Lowe's house wrap provides defense against air infiltration by reducing drafts, increasing comfort and reducing energy loss. House wraps and tarps are the two best choices for a groundsheet, but we have a tendency to lean more towards a tarp just because it’s more readily available. Mass walls for the purposes of this chapter shall be considered walls of concrete block, concrete,. oks48594878 made in. 12 ROLLS OF. Have used higher perm rate products and had Solar driven moisture problems especially behind brick. 5 / 5. Shipper Address. In the event of a conflict between this report and theVapor semi-impermeable: 1. Here are some of the best crops that you can grow in a poly house: Tomatoes – Nothing beats the taste of juicy, sun-ripened tomatoes. House wraps may also have other materials woven or bonded to them to help resist tearing. Before windows can be installed in a rough opening, the following steps are essential: 1. 2 Foam plastic sheathing (Insulation over foam plastic sheathing in 2018 and 2021 IRC) Section N1101. Yes, you do need a house wrap for a shed. You should leave about an inch around the edges. Housewrap is used in exterior walls, attics, windows, doors. Model # D15466691. Tyvek wasn’t actually new in the early 1980s—it was invented by DuPont in 1955 and first commercialized in 1967—but it was new enough in the building industry that two. One layer of an approved water resistant barrier over an approved plastic house wrap, or. 5. Tel:+86-532-8513-7838 Fax:+86-532-8513-7938. , Samjin Plastic Co. OKS Poly Co. Companies to explore. Permeability measures the amount of vapor transmission that a housewrap will allow over a period of time, minimizing the potential for accumulation of moisture vapor. 245. ₹ 1,200/ Square Meter Get Latest Price. House Wrap. Panjiva uses over 30 international data sources to help you find qualified vendors of South Korean lumber wrap. Air resistance - protects the wall assembly from air infiltration to increase the comfort of. Track your competitors, get freight forwarding leads, enforce exclusivity agreements, learn more. 1 Basic hardboard. oks poly co. of foam or mineral-wool board against the concrete. 019-inch (0. It goes between the rigid foam and the vertical strapping, or. These plastic films have helped reduce GHG emissions in the United States by 120 million to 600 million tons of CO 2Consists of asphalt-impregnated building felt or plastic house wrap that is fully integrated with all flashing around doors, windows, and walls. 2018-03-07: 201803039409: OKS POLY CO. Protect your investment with DuPont™ TYVEK® HomeWrap®. Apply for a Home Depot Consumer Card. R703. Here’s how to do it. 00 /roll. 1 / 14 Family Handyman Avoid Cheap House Wrap “Perm rate” is the rate at which a house wrap allows water vapor to pass through it. 26 galvanized sheet gage), corrosion-resistant weep screed or plastic weep screed, with a minimum vertical attachment flange of 31/2 inches (89 mm) shall be provided at or below the foundation plate line on exterior stud walls in accordance with ASTM C 926. 2. . The boards are available in several thicknesses and R-values; 1-inch and 2-inch are common thicknesses. Tyvek. ). Interior polyethylene can also be used on the interior of walls and ceilings in very cold climates (northern Ontario, northern Quebec, northern Manitoba, interior of Alaska) where air conditioning is never used. for pricing and availability. shipments available for Qingdao Oks Poly Co. Vapor permeable: greater than 10 perms. Here’s another easy way to keep the plastic in place over a small greenhouse tunnel. If water sprinkled on the wall is not readily absorbed. . ltd. 7-sq ft per bag (28. 1 perm. 3 Wood. Plastic on the outer surface of a wall in cold weather could cause problems. Cover with plastic wrap; place in refrigerator 1 hour. Heavy, Black plastic sheeting, ideal for your outdoor projects. First and foremost, housewrap acts as a backup barrier that keeps water off the structural sheathing and framing. Tyvek. You’ll first need to a strip of wood to the concrete wall that is six to twelve inches above the exterior grade. Home l;. 90. Most solid building components including drywall, plaster, plywood, glass, wood, rigid foam insulation and poured concrete (not concrete blocks) will act as air barriers. Find My Store. House Plant tumbler wrap for 20oz skinny tumblers, Plant sublimation tumbler, House plant tumbler wrap template, plant tumbler wrap (98) $ 4. 9-ft x 100-ft House Wrap (900-sq ft) Model # 59101. Company introduction Organization South Korean based Private Family business. - General Multi- Purpose Commodity Tarpaulins- Heavy Duty Tarpaulins- Garden tarp- Domestic and Leisure Covers: Vehicle Covers, Boat Covers, Pool Covers, Sun Screens- Farm & Industrial Covers: Lumber Covers, Hay Covers, Cotton Module, Industrial Covers - Building Materials: House- Wraps, House- Wrap Tapes,. Wrapping – Wrapping should start at the foundation, extending at least an inch past the wall-to-foundation intersection and continuing upwards like shingle installation with the higher course overlapping the lower. We can help protect your build from the elements from the very beginning with house wrap and sheeting - and years after completion with premium flashing and vapor barrier products. These 1" plastic Bostitch® SB-CAPS Caps eliminate pull-through when installing felt, house wrap and foam board insulation. The humid air is indoors. Nonwoven Woven StuccoWrapLike you, I built my house with interior poly, and subsequent renovation work has not revealed any problems. roll. Protection from the Ground Up (833) 261-6501: Order By Phone M-F, 7:30am-4:30pm. So if you keep a dehumidifier running, it keeps the air dry. comwater during irrigation. With proper installation of foam insulation, the house should be well sealed and allow the house to. Vapor permeable: greater than 10 perms. PVC decking is the relative new kid on the block but is quickly gaining popularity. Penalties include but are not limited to loss of printing privileges for production packaging. A vinyl wrap is a flexible material with adhesive on one side that conceals and protects other surfaces. Perm rate is at the perfect level. Installing 6-millimeter poly sheets is another option to prevent moisture from entering your basement walls. See exports to Sigman U. A summary of customers, suppliers, and logistics partners for the latest 50 U. While there is debate on the optimal. ,Ltd. ,ltd. A metric perm is defined as 1 gram of water vapor per day, per square meter, per millimeter of mercury. ft. I was planning to use Tyvek but - everyone has their own opinion I realize that. 0 perms or less and greater than 0. The average cost of this protective barrier is $0. It is denser than EPS and provides more R-Value with a rating of 5 per inch of thickness. Reduce household drafts and make your home insulation work better with TYVEK HomeWrap 9 ft. 1 and 1. Out of Stock Online. S. Decided it was the EKP Fuel Control Module. Most houses with interior poly are not experiencing problems. Stego has several barriers made specifically for crawl space encapsulation. 1t63PWQ . , a perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury. . Its main function is to keep water and air. rated house wrap Bottom Board fabric for floor Woven micro perforated house wrap Synthetic Roofing membrane. This tape features an aggressive pressure sensitive acrylic adhesive mounted on a biaxially oriented polypropylene film. This could be the rigid foam, or it could be the housewrap, or it could be the Zip sheathing. 2266 | 800. I want to remove the vinyl and install Hardie cement boards. , Ltd. Kingspan Insulation LTD (va) 9. As closed cell spray foam is a vapor barrier, and is resistant to moisture passing through it in either direction, adding a weather barrier to the outside becomes redundant. 2x4 2x6 1/2" drywall + paint kraft paper w/ tabs 6 mil poly (sealed) latex paint R-8 fiberglass batt R-20 friction fit batt 3/8” plywood 1/2" OSB 1/2" OSB + 1 1/2” DOW XPS 1 layer 30 minute paper Tyvek Tyvek Drain Wrap under Lathe Paper 2 layers 30 minute paper Tyvek Drain Wrap on OSB Lathe Paper on XPS. 766 total shipments. Lassiter, col. Weather-resistant barriers possess the need to have superb qualities of durability, resilience, and strength so as to fight the highest levels of. Sealing wall penetrations and using latex wall paint will slow the movement down, but allow drying to occur. However, for maximum protection, a 2-inch to 4-inch (51-102 mm) overlap on the sill plate is recommended. The air doesn’t seep through the walls, meaning you save more money every day. ignoring the random kickers and bracing. Head Office: (1-55, Woram-Dong) 50 Gil35, Seong Seo-Ro, Dalseo-Ku, Daegu, Korea Tel:+82-53-582-1175~7 Fax:+82-53-582-1178 China Factory : Haibin Industrial Zone Jiaonan City, Qingdao Chinaoks poly co. , Ltd. Tel:+82-53-582-1175~7 Fax:+82-53-582-1178. , Ltd. Ft) Model # D14377909 SKU # 1000171047. ,LTD. 9147 or the proposed “Single-use Plastic Products Regulation Act. 83669 Thanks Mike. Air resistance - protects the wall assembly from air infiltration to increase the comfort of the building by reducing drafts and increasing energy efficiency 22 products in House Wrap Width (Feet): 9 Width (Feet): 3 Length (Feet): 100 Tyvek Lowe's Length (Feet): 150 Pickup Free Delivery Fast Delivery Sort & Filter Lowe's 3-ft x 100-ft Water Resistant House Wrap (300-sq ft) Model # 03100 Find My Store for pricing and availability 349 Lowe's 9-ft x 150-ft Water Resistant House Wrap (1350-sq ft) OKS POLY CO. The ICC-ES allows for three different water-resistance testing standards; however, only the first two are acceptable for plastic wraps. Lathing shall be connected to the framing members 7 inches on center. Higher perm rates are better for some climates and vice versa. report. Class two: Between 0. 6 out of 5 stars 527. ft. Poly plastic. The rigid polyiso board continuous insulation reduces thermal bridging and has an integrated weather-resistive barrier that eliminates the need for plastic house wrap. 38 mm), and 20 mils (0. Head Office: (1-55, Woram-Dong) 50 Gil35, Seong Seo-Ro, Dalseo-Ku, Daegu, Korea Tel:+82-53-582-1175~7 Fax:+82-53-582-1178 China Factory : Haibin Industrial Zone Jiaonan City, Qingdao China Tel:+86-532-8513-7838 Fax:+86-532-8513-7938 ICP Register No. 4" and 6" widths also available. Our design and development team is committed to evolving bulk. If you pre-seal the joints in the poly with acoustic seal and even cover the staple holes, I think you could achieve a comparable air. Find My Store. , Ltd. Greenwich BOE OKs $6M for 2 schools, special education How Greenwich police are tackling car thefts, domestic violence Greenwich board OKs $42M more for Central Middle School projectHomeGuard house wrap is an engineered, woven, polyolefin material designed for use as a secondary weather resistive barrier. Head Office: (1-55, Woram-Dong) 50 Gil35, Seong Seo-Ro, Dalseo-Ku, Daegu, Korea Tel:+82-53-582-1175~7 Fax:+82-53-582-1178 China Factory : Haibin Industrial Zone Jiaonan City, Qingdao China House wrap breathes; Saran wrap tightly seals. It’s a dirty job so be prepared. Lowe's house wrap provides defense against air infiltration by reducing drafts, increasing comfort and reducing energy loss from the home. 8, line 2. Its industry leading permeance rating is optimized for better building science. Class III – Medium permeability vapor retarders – rated greater than 1. Shingles. Get access to 30+ million shipment records, shipment profiles & company tracking. Head Office: (1-55, Woram-Dong) 50 Gil35, Seong Seo-Ro, Dalseo-Ku, Daegu, Korea Tel:+82-53-582-1175~7 Fax:+82-53-582-1178 China Factory : Haibin Industrial Zone Jiaonan City, Qingdao China Tel:+86-532-8513-7838 Fax:+86-532-8513-79382×4 walls with r-13 cavity insulation, 1/2″ plywood or osb, not taped, 1″ poly iso foil faced, taped and sealed, 1×4 bats then hardiplank siding. Plastic House Wrap. United-States Scottsdale AZ. Pay $128. Drywall panels are used to create interior walls and ceilings. Best Bubble Wrap Insulation. home guard inc. . See exports to Jumpstart Consultants Inc. 90. A drainage gap of 1/4 inch is a recommended best practice behind stucco and 1/16 inch (about the thickness of some textured house wrap) is recommended behind lap siding (Baechler et al. Vapor semi-permeable: 10 perms or less and greater than 1. iv) Rigid materials. house wrap (Figure 3) except the house wrap apron in step 1 is not re-quired, and instead of integrating house wrap in step 5, construction tape is installed above the head flashing (the construction tape acts as counter-flashing). Make sure the sheeting is taut as you go, but don’t stretch it out of shape. It's just that with Enermax the foil vapour barrier is only one component. Fasten the paper to the edges, making sure it is taut, then wrap the pieces around the opening and staple. Generally, stucco that is applied directly to solid surfaces is placed in two coats that together total 5/8 inch of thickness. 5. 26 galvanized sheet gage), corrosion-resistant weep screed or plastic weep screed, with a minimum vertical attachment flange of 3 1 / 2 inches (89 mm), shall be provided at or below the foundation plate line on exterior stud walls in accordance with ASTM C926. 8) providing an excellent air barrier. Jumbo Tex is available in 20-minute and 60-minute water-resistive options, as well as two-ply products. for pricing and availability. Plate 97 shipments. The 20 ft. mx Website : INDUSTRIAS PLÁSTICASBasement Vapor Barriers. When installed properly, it performs three basic functions. Be sure to pull the building wrap snug and avoid wrinkles and creases. Housewrap (or house wrap) generally denotes a synthetic material used to protect buildings. Greenhouse Clear Plastic Film Polyethylene Covering. If you are installing “innie” windows, your housewrap should go under the foam. There apparently is an adhesive additive for spray foam, which will assist in the foam being able to stick to house wraps or other slick surfaces. Plastic 89 shipments. 4649. HOUSEWRAP FABRIC, 65GSM(VALUEWRAP PLAIN) ONE SIDED COATED AND UV TREATMENT 5"ID PAPER CORE UNPERFORATED @TARIFF CLASSIFICATION 5903. Shop Lowe's 9-ft x 150-ft Water Resistant House Wrap (1350-sq ft) in the House Wrap department at Lowe's. oks020-5 weight- 97 24 rolls of po no. com. This extra heavy-duty plastic can be used. PACTIV. They primarily export from United States with 620 shipments. 38A – US 10,914,077 –. Prep the door area with a sill nose. 20 rolls of 97gsm polyethylene lumber wrap black/white 120gsm polyethylene lumber wrap black/white po no. $22. Bought a new EKP for quite cheap on Ebay and also purchased an $8 dollar CPU fan 40MM diameter and 10MM deep. , updated weekly since 2007. Call ImportGenius Join ImportGenius to see the import/export activity of every company in the United States. , Ltd. 108 WHITE NOT PERFORATED HOUSEWRAP. 1. A poly house of 10 x 5 m size could accommodate 8000 polythene bags (9 x 5 cm sizes) on ground. Address. 3. The permeance is as low as 0. The barrier has Class I and II (A and C) variants. Panjiva uses over 30 international data sources to help you find qualified vendors of South Korean housewrap. Everbilt housewrap blocks air conditioning and heating from leaving buildings, contributing to energy efficiency. Poly House For Nursery Production. 0 perms or less and greater than 0. Seongju, South Korea Manufacturer . . Use it in conjunction with insulation to. The most common usage of house wrap is to entirely surround the house directly over the sheathing and beneath the vinyl siding with a light paper-like material. They primarily export from United States with 620 shipments The chief virtue of Zip System sheathing is that it marries the water-resistant barrier (WRB) to the sheathing, eliminating the step of adding a separate layer of asphalt felt, Tyvek, or any of the many house wrap products on the market. House Wrap with Stucco - Tyvek or Typar??. 906 INDUSTRIAL DRIVE CLITON NC 28328 USA. When installed properly, these products help prevent water damage, mildew and energy loss. Product Details. 2) Don’t use a vapor barrier, such as poly, on the interior. 5 mm). * Multi-Purpose Heavy-weight Black Plastic Drop Sheet On A. Find My Store. 5-ft x 200-ft Water Resistant House Wrap (1000-sq ft) Model # D13403089. The key to insulating your pole barn effectively is to start with the right building design. This is the perfect organizer for your desk. Trim away the excess. A buildup of moisture within a home’s wall cavities is. They are also straightforward. 590390 - Textile Fabrics, Impregn Etc Nesoi, Plastics Nesoi; 392190 - Plates, Sheets, Film Etc, Plastic Nesoi Ncel Nesoi;Shop Lowe's 3-ft x 100-ft Water Resistant House Wrap (300-sq ft) in the House Wrap department at Lowe's. It is approved for direct burial into the ground in accordance with the local plumbing code at the installation location. Hover Image to Zoom. beyond the corner boards. In developing countries like India, polyhouse farming is a popular greenhouse technology due to its low cost of construction and easy maintenance. Food Safety Certification Program. It is also essential to seal the areas cut by subcontractors during the. 1 perm. 0 and 10 perms · House wrap · 15 lb. such as Tyvek house wrap. com. Co. Fluid Applied Weather Barrier (FAWB) is ideal for a recessed window opening because it’s nearly foolproof. Start your project right with our large selection of house wraps and rainscreen for all your building needs. Yes. Two layers of an approved water resistant barrier material, or. 1391 5121 Winnetka Ave North, Suite 130 New Hope, MN 55428Sample Shipment From Oks Poly Co. The higher the “perm number,” the more vapor permeable the materials.