{"product_id":"johns-manville-90012663-johns-manville-enrgy-3-grade-2-polyiso-roof-insulation-board-4-2-in-x-4-ft-x-8-ft","title":"Johns Manville ENRGY 3 Grade 2 Polyiso Roof Insulation Board, 4.2 in. x 4 ft. x 8 ft.","description":"\u003ch1\u003eJohns Manville ENRGY 3 Grade 2 Polyiso Roof Insulation Board, 4.2 in. x 4 ft. x 8 ft.\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eThis is a 4.2 in. thick, 4 ft. x 8 ft. flat ENRGY 3 polyisocyanurate roof insulation board with a closed-cell foam core and glass-reinforced facers, rated Grade 2 (20 psi) per ASTM C 1289, Type II, Class 1. Each board is sold per piece and provides about 32 sq ft of coverage. It pairs with JM multi-ply, single-ply and metal roof systems as part of approved JM Peak Advantage roofing guarantees.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh R-Value:\u003c\/strong\u003e At 4.2 in. thickness this board carries an LTTR value of 24.9 (hr-ft2-F)\/BTU per the published table.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 psi Compressive Strength:\u003c\/strong\u003e Grade 2 rating provides minimum 20 psi (138 kPa) compressive resistance at 10% consolidation per ASTM D 1621.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlass-Reinforced Facers:\u003c\/strong\u003e Facers provide rigidity and resistance to indentation and crushing, and are compatible with BUR, modified bitumen and single-ply membrane systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosed-Cell Foam Core:\u003c\/strong\u003e The closed-cell polyisocyanurate core delivers high R-value per inch and is approved for direct application to steel decks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad System Compatibility:\u003c\/strong\u003e Compatible with all single-ply systems (TPO, PVC, EPDM) and selected multi-ply BUR, APP and SBS systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertified Approvals:\u003c\/strong\u003e UL Classified, FM Approved, Miami-Dade County Approved, Florida Building Code Approved, PIMA QualityMark Certified and Title 24 compliant.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmentally Responsible:\u003c\/strong\u003e Produced with a pentane blowing agent with zero ozone depletion and virtually no global warming potential.\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\u003eManufacturer model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e90012663\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 board, 4.2 in. x 4 ft. x 8 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\u003eENRGY 3 Flat Polyisocyanurate Roof Insulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eClosed-cell polyisocyanurate foam core with glass-reinforced facers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNominal size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 ft. x 8 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 ft. x 8 ft., 4.2 in. thick (107 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.2 in.\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\u003eApprox. 32 sq ft per board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompressive resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGrade 2: 20 psi (138 kPa) minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLTTR value\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e24.9 (hr-ft2-F)\/BTU at 4.2 in. thickness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eASTM C 1289, Type II, Class 1, Grade 2 (20 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApprovals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFM Standards 4450\/4470, UL 790\/263\/1256, CAN\/ULC S704 Type 2 \u0026amp; 3 Class 3, Miami-Dade, Florida Building Code, PIMA QualityMark, Title 24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eService temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-100°F to 250°F (-73°C to 121°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMoisture vapor permeance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;1 perm per ASTM E 96\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMechanically fastened, urethane adhesive or hot asphalt\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 low-slope roof insulation for multi-ply, single-ply and metal roof systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct weight, complete sell unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 lb\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 4 ft. x 8 ft. board covers approximately 32 sq ft of roof area. Divide total roof area by 32 to estimate board count; boards are typically layered or tapered in combination with other insulation to meet design R-value.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eENRGY 3 is designed for use in JM multi-ply (BUR, APP, SBS) and all single-ply (TPO, PVC, EPDM) roofing systems and is approved for direct application to steel decks. Membrane fasteners, adhesives and cover boards are sold separately; refer to JM application instructions for attachment patterns.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What is included with this item?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One 4.2 in. x 4 ft. x 8 ft. flat ENRGY 3 Grade 2 polyiso insulation board; fasteners, adhesives and membrane are sold separately.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How many boards do I need for my roof?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Each board covers about 32 sq ft, so divide your roof area by 32 and add waste allowance for cuts and perimeter fit.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What R-value does this board provide?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The published LTTR value at 4.2 in. is 24.9 (hr-ft2-F)\/BTU; actual in-place R-value depends on installation circumstances.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How is it attached?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It can be installed mechanically fastened, with urethane adhesive, or in hot asphalt, following JM application instructions and local code.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Can it go directly on a steel deck?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the closed-cell polyisocyanurate core is approved for direct application to steel decks.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is it compatible with single-ply membranes?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the glass-reinforced facers are compatible with TPO, PVC and EPDM single-ply systems as well as BUR and modified bitumen.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eChoose 4.2 in. ENRGY 3 when the design calls for roughly R-25 of continuous polyiso per layer under a single-ply or multi-ply membrane. Follow the JM minimum fastening pattern for the board size and membrane type, and confirm the deck and attachment method with your technical specialist. Pair with a JM cover board where foot traffic or membrane puncture resistance is a concern.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eFollow JM application instructions and local building code for attachment; verify deck type and fastener pattern before installation.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder the Johns Manville ENRGY 3 4.2 in. polyiso roof insulation board today for high-R commercial roof performance.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Johns Manville","offers":[{"title":"Default Title","offer_id":53527343137135,"sku":"90012663","price":74.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/519110_default_hero.jpg?v=1790314000","url":"https:\/\/superarbor.io\/products\/johns-manville-90012663-johns-manville-enrgy-3-grade-2-polyiso-roof-insulation-board-4-2-in-x-4-ft-x-8-ft","provider":"Super Arbor","version":"1.0","type":"link"}