{"product_id":"gaf-gaf35iso-gaf-3-5-in-4-ft-x-8-ft-energyguard-grade-ii-20-psi-polyiso-roof-insulation-panel","title":"GAF 3.5 in. 4 ft x 8 ft EnergyGuard Grade-II (20 psi) Polyiso Roof Insulation Panel","description":"\u003ch1\u003eGAF 3.5 in. 4 ft x 8 ft EnergyGuard Grade-II (20 psi) Polyiso Roof Insulation Panel\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eThis GAF EnergyGuard Grade-II (20 psi) polyiso insulation panel measures 4 ft x 8 ft and is 3.5 in. thick, with glass fiber reinforced cellulosic felt facers over a polyisocyanurate foam core. One panel covers 32 sq ft; a 13-piece bundle covers 416 sq ft. It installs in low-slope roof systems and pairs with GAF single-ply, mod-bit and BUR membranes.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh thermal value:\u003c\/strong\u003e Polyisocyanurate foam core delivers high thermal efficiency for low-slope commercial roofs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 psi Grade II:\u003c\/strong\u003e Classified ASTM C1289 Type II, Class 1 Grade 2 (20 psi) compressive strength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge 4x8 format:\u003c\/strong\u003e The 4 ft x 8 ft panel covers 32 sq ft for faster installation on open roof fields.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad system approval:\u003c\/strong\u003e System approved for modified bitumen, BUR and single-ply assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThird-party listings:\u003c\/strong\u003e FM Approved 4450\/4470, UL 1256\/790\/263, UL ER1306-03, Miami-Dade County and State of Florida approved.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSustainable content:\u003c\/strong\u003e Green Circle Certified for recycled content and contributes to green building rating systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField friendly:\u003c\/strong\u003e Lightweight and easy to cut for efficient handling and installation.\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\u003eGAF\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 panel, 4 ft x 8 ft x 3.5 in. (13 per bundle)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEnergyGuard Polyiso Roof Insulation\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, 3.5 in. thick\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.5 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\u003e32 sq ft per panel; 416 sq ft per 13-piece bundle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolyisocyanurate foam with glass fiber reinforced cellulosic felt (GRF) facers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGrade\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eASTM C1289 Type II, Class 1, Grade 2 (20 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePack quantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e13 panels per bundle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e21.312 lb per panel (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem approval\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMod bit, BUR, single-ply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApprovals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFM Approved 4450\/4470; UL 1256\/790\/263; UL ER1306-03; Miami-Dade County Approved; Florida Building Code Approved; PIMA Quality Mark; ASTM C1289; ASTM D1621; ASTM D2126; ASTM C209; ASTM E96; ASTM E84\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLow-slope commercial roof insulation and tapered system fill\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 panel covers 32 sq ft; a 13-piece bundle covers 416 sq ft. Divide total roof area by 32 sq ft per panel to estimate quantity and follow the tapered layout plan for slope and drainage design.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eCompatible with GAF EnergyGuard tapered insulation systems and TPO and PVC membranes in adhered, mechanically attached and induction welded systems, plus mod-bit and BUR assemblies. Membranes, adhesives, plates and fasteners sold separately.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What comes in one sell unit?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Each selling unit is one 4 ft x 8 ft, 3.5 in. thick panel; panels ship 13 to a bundle covering 416 sq ft.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I calculate how many panels I need?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Divide the roof area in square feet by 32 (one panel's coverage); one 13-piece bundle covers 416 sq ft.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is this panel tapered?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It belongs to the GAF EnergyGuard tapered polyiso line, which is offered in slopes from 1\/16 in. to 1\/2 in. per foot; the specific slope of this item is not stated in its spec lines.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What is its compressive strength?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It is ASTM C1289 Type II, Class 1 Grade 2, rated at 20 psi minimum compressive strength.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Which membrane systems can it be used with?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It is approved for modified bitumen, BUR and single-ply systems, including TPO and PVC installed adhered, mechanically attached or induction welded.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How should it be fastened?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Install per the GAF data sheet and tapered design; panels can be mechanically attached with fasteners and plates or set in low-rise foam per system requirements.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eFor big open roof fields, 4 ft x 8 ft panels reduce joint count and install time versus 4 ft x 4 ft stock. Verify the specified slope designation against your tapered layout before ordering, since this line ships in many slope\/size combinations. Keep bundles wrapped and dry until install, stagger joints, and use a GAF-approved cover board where a Class A assembly over combustible decks requires one.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eFollow the manufacturer's installation instructions and local code, and use proper fall protection and lifting technique when handling large insulation panels on the roof.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder GAF EnergyGuard Grade-II 20 psi polyiso insulation 4 ft x 8 ft panels for faster low-slope coverage.\u003c\/strong\u003e\u003c\/p\u003e","brand":"GAF","offers":[{"title":"Default Title","offer_id":53521619583343,"sku":"GAF35ISO","price":84.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/47428_default_hero.jpg?v=1790180547","url":"https:\/\/superarbor.io\/products\/gaf-gaf35iso-gaf-3-5-in-4-ft-x-8-ft-energyguard-grade-ii-20-psi-polyiso-roof-insulation-panel","provider":"Super Arbor","version":"1.0","type":"link"}