{"product_id":"gaf-energyguard-polyiso-insulation-board-1-in-to-2-in-thick-4-ft-x-8-ft-sheets-20-psi-poly","title":"GAF EnergyGuard Polyiso Insulation Board, 1 in. to 2 in. Thick, 4 ft x 8 ft Sheets, 20 PSI Polyisocyanurate Foam","description":"\u003ch1\u003eGAF EnergyGuard Polyiso Insulation Board, 1 in. to 2 in. Thick, 4 ft x 8 ft Sheets, 20 PSI Polyisocyanurate Foam\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eGAF EnergyGuard is a rigid polyisocyanurate foam insulation board for low-slope roofing, sold here in 1.0 in. and 1.75 in. 4 ft x 8 ft sheets and 2.0 in. sheets in 4 ft x 4 ft or 4 ft x 8 ft sizes, all rated 20 PSI. Each sell unit is one sheet. Stack layers to build up R-value under single-ply membranes or other roof coverings.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh R-value core:\u003c\/strong\u003e Polyisocyanurate foam is one of the most thermally efficient rigid insulations commonly used on flat roofs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple thicknesses:\u003c\/strong\u003e The line includes 1.0 in., 1.75 in. and 2.0 in. boards to reach the R-value your design requires.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo footprint sizes:\u003c\/strong\u003e Available in 4 ft x 8 ft sheets for broad coverage and 4 ft x 4 ft boards for easy handling and tighter roofs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 PSI compressive strength:\u003c\/strong\u003e The listed boards carry a 20 PSI rating for use beneath roof membranes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhole-sheet units:\u003c\/strong\u003e Each variant sells as a single sheet in its stated size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoofing-system pairing:\u003c\/strong\u003e Use under GAF or other compatible single-ply membrane systems with appropriate insulation attachments.\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 sheet\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0 in. x 4 ft x 8 ft; 1.75 in. x 4 ft x 8 ft; 2.0 in. x 4 ft x 4 ft; 2.0 in. x 4 ft x 8 ft\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSheets of 4 ft x 8 ft or 4 ft x 4 ft, thicknesses 1.0 in. to 2.0 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0 in., 1.75 in., or 2.0 in. depending on variant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompressive strength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 PSI (as listed on the board variants)\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 4 ft x 8 ft sheet covers 32 sq. ft.; one 4 ft x 4 ft sheet covers 16 sq. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRigid roof insulation for low-slope roofing assemblies\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\u003eA 4 ft x 8 ft sheet covers 32 sq. ft. and a 4 ft x 4 ft sheet covers 16 sq. ft. before allowances for joints or laps. Divide total roof area by the sheet coverage to estimate quantities, and layer multiple thicknesses where greater R-value is needed.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eDesigned for use as rigid insulation under low-slope roof membranes, including GAF roofing systems; check the membrane manufacturer's requirements for attachment and acceptable substrates. Fasteners, adhesives, cover boards and membranes are sold separately.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What comes with an order?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One sheet of EnergyGuard polyiso insulation in the thickness and footprint you select.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How many sheets do I need?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Divide your roof area by 32 sq. ft. for 4 ft x 8 ft sheets or 16 sq. ft. for 4 ft x 4 ft sheets, then add for waste and layout.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What thickness should I choose?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Choose the thickness that meets the R-value target of your roof assembly; 1.0 in., 1.75 in. and 2.0 in. options are listed in this line.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Can it hold foot traffic during installation?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The listed boards carry a 20 PSI compressive rating for use under roofing; still avoid point loads and follow the membrane manufacturer's installation guidance.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is it compatible with my membrane?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Polyiso boards are commonly used under single-ply and other low-slope membranes, but confirm attachment method and compatibility with your membrane manufacturer's specifications.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eEnergyGuard polyiso is the standard choice when you need maximum R-value per inch on a low-slope roof. Use 4 ft x 4 ft boards on small or obstructed roofs and 4 ft x 8 ft sheets for open fields to cut joint count. Where a heavier membrane or cover board is specified, verify fastener pull-out and density requirements for the chosen thickness.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHandle large sheets carefully in wind and wear gloves and eye protection when cutting polyiso, which can shed dust and splinters.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder GAF EnergyGuard polyiso insulation boards in the thickness and sheet size your roofing project needs.\u003c\/strong\u003e\u003c\/p\u003e","brand":"GAF","offers":[{"title":"GAF 1.0\" Energyguard Iso 4' X 8' 20 PSI","offer_id":67587094348143,"sku":"58GAIS1048","price":32.53,"currency_code":"USD","in_stock":true},{"title":"GAF 1.75\" Energyguard ISO 4' X 8' 20 PSI","offer_id":67587094380911,"sku":"58GAIS1758","price":42.14,"currency_code":"USD","in_stock":true},{"title":"GAF 2.0\" Energyguard Iso 4' X 4' 20 PSI","offer_id":67587094413679,"sku":"58GAIS2044","price":29.77,"currency_code":"USD","in_stock":true},{"title":"GAF 2.0\" Energyguard Iso 4' X 8' 20 PSI","offer_id":67587094446447,"sku":"58GAIS2048","price":50.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/Insulation-SKU_2275562-primary.jpg?v=1790448652","url":"https:\/\/superarbor.io\/products\/gaf-energyguard-polyiso-insulation-board-1-in-to-2-in-thick-4-ft-x-8-ft-sheets-20-psi-poly","provider":"Super Arbor","version":"1.0","type":"link"}