{"product_id":"johns-manville-jm-vapor-barrier-sa-self-adhering-roofing-underlayment-45-in-x-468-ft-white","title":"Johns Manville JM Vapor Barrier SA Self-Adhering Roofing Underlayment 45 in. x 468 ft. White Roll","description":"\u003ch1\u003eJohns Manville JM Vapor Barrier SA Self-Adhering Roofing Underlayment 45 in. x 468 ft. White Roll\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eJM Vapor Barrier SA is a self-adhering, tri-laminate woven polyethylene vapor barrier for commercial roofing, supplied as one white 45 in. x 468 ft. roll. Its self-sealing SBS rubber and asphalt blend provides low air and vapor permeability, and the UV-protected nonslip top surface gives temporary weather protection for 90 days.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTri-Laminate Strength:\u003c\/strong\u003e Tri-laminate woven polyethylene construction provides high tensile strength and puncture resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-Sealing:\u003c\/strong\u003e Self-sealing SBS rubber and asphalt blend provides low air and vapor permeability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV-Protected Surface:\u003c\/strong\u003e Nonslip, UV-protected top surface offers temporary weather protection for 90 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNonslip Walkability:\u003c\/strong\u003e The nonslip top surface improves footing during installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Roll Length:\u003c\/strong\u003e Each roll measures 45 in. x 468 ft. for broad coverage per unit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch2\u003eSpecifications Table:\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJohns Manville\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSell unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 roll, 45 in. x 468 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJM Vapor Barrier SA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTri-laminate woven polyethylene with self-sealing SBS rubber and asphalt blend\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45 in. x 468 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage per unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOne 45 in. x 468 ft. roll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish \/ texture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNonslip, UV-protected top surface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWind \/ fire \/ impact rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProvides temporary weather protection for 90 days; high tensile strength and puncture resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCommercial roofing vapor barrier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch2\u003eCoverage \u0026amp; How Much You Need:\u003c\/h2\u003e\u003cp\u003eOne roll measures 45 in. wide by 468 ft. long, covering roughly 1,755 sq. ft. laid flat before laps. Size your job by counting rolls against deck area and accounting for side and end laps.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eIntended for use in commercial roofing assemblies as a vapor barrier layer; consult the roofing system specification for compatible membranes and adhesives, which are sold separately.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What is included in one order?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One white roll of JM Vapor Barrier SA measuring 45 in. x 468 ft.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How much area does one roll cover?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Laid flat, a roll covers approximately 1,755 sq. ft.; deduct lap allowances when estimating.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How long does it protect against weather?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The UV-protected top surface provides temporary weather protection for 90 days.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is it self-adhering?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, it uses a self-sealing SBS rubber and asphalt blend with low air and vapor permeability.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is the surface safe to walk on?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The top surface is nonslip and designed for footing during installation.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eA self-adhering woven polyethylene vapor barrier like this is a smart choice under fully adhered membrane systems where air and vapor drive are a concern. Plan work so the 90-day UV exposure window fits your schedule, and prime substrates per the system specification before applying. Overlap laps fully and roll them down to ensure the self-sealing blend bonds without voids.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eRoof work carries fall hazards; use appropriate fall protection and take care with cutting tools when trimming the membrane.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder the Johns Manville JM Vapor Barrier SA 45 in. x 468 ft. roll for your commercial roofing project.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Johns Manville","offers":[{"title":"Default Title","offer_id":53522669830511,"sku":"JMVB5","price":470.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/JMVB5_0.jpg?v=1790230258","url":"https:\/\/superarbor.io\/products\/johns-manville-jm-vapor-barrier-sa-self-adhering-roofing-underlayment-45-in-x-468-ft-white","provider":"Super Arbor","version":"1.0","type":"link"}