{"product_id":"atlas-atl25isog3-atlas-acfoam-iii-grade-iii-25-psi-polyiso-roof-insulation-2-5-in-x-4-ft-x-8-ft","title":"Atlas ACFoam-III Grade-III 25 psi Polyiso Roof Insulation 2.5 in x 4 ft x 8 ft","description":"\u003ch1\u003eAtlas ACFoam-III Grade-III 25 psi Polyiso Roof Insulation 2.5 in x 4 ft x 8 ft\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eAtlas ACFoam-III Grade-III polyisocyanurate roof insulation board is 2.5 in thick, 4 ft x 8 ft, rated at 25 psi compressive strength. One board covers 32 sq ft; the stated 608 sq ft corresponds to a 19-board unit. Sold per piece for low-slope roofing assemblies.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2.5 in Thickness:\u003c\/strong\u003e 2.5 inch polyiso board for high R-value per inch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 psi Strength:\u003c\/strong\u003e Grade-III 25 psi compressive strength for membrane roofing assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4x8 Board:\u003c\/strong\u003e Standard 4 ft x 8 ft board dimensions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFM Approved:\u003c\/strong\u003e FM Standard 4450\/4470 approved.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMiami-Dade \u0026amp; FL:\u003c\/strong\u003e Miami-Dade County Approved and Florida Product Approved.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUL Classified:\u003c\/strong\u003e UL 1256, UL 790 (ASTM E108), UL 263 (ASTM E119) and UL 1897 listings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreenguard:\u003c\/strong\u003e Greenguard certified for low chemical emissions.\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\u003eAtlas\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 (PC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eACFoam-III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5 in x 4 ft x 8 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompressive strength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 psi (Grade-III)\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\u003e608 sq ft (stated unit coverage)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolyisocyanurate (polyiso) foam insulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApprovals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eASTM C1289; CAN\/ULC-S704; CCMC 12423-L; UL 1256, 790, 263, 1897; FM 4450\/4470; Miami-Dade; Florida Product; Greenguard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 lb per piece\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 roof insulation in membrane 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 single 4 ft x 8 ft board covers 32 sq ft; the stated coverage of 608 sq ft corresponds to a 19-board unit. Divide total roof area by 32 sq ft to count boards, adding for taper or layered thickness requirements.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eUsed as roof insulation under single-ply, modified bitumen or built-up roofing membranes with appropriate adhesives, fasteners and plates. Those components are sold separately.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What size is the board?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e 2.5 in thick, 4 ft x 8 ft.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the compressive strength?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e 25 psi, Grade-III per the product title.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How much area does it cover?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Each 4x8 board covers 32 sq ft; the item's stated coverage is 608 sq ft per unit.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What standards does it meet?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e ASTM C1289, UL listings 1256\/790\/263\/1897, FM 4450\/4470, Miami-Dade, Florida Product, and Greenguard certifications.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How is it attached?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Follow your roofing membrane system's attachment method; adhesives and fasteners\/plates are sold separately.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How much does a board weigh?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Approximately 18 lb per piece.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003ePolyiso is the go-to cover board\/insulation for low-slope membrane roofs; 2.5 in at 25 psi suits membrane systems where moderate compressive load is expected. Confirm total R-value needs and layer 2.5 in boards over a lower layer if required. Check FM\/Miami-Dade approvals against your project spec before substituting thickness.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHandle boards flat to avoid flex cracking, and follow roofing-system fire and hot-work safety rules during installation.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder Atlas ACFoam-III 2.5 in polyiso roof insulation for your membrane roof.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Atlas","offers":[{"title":"Default Title","offer_id":53529507594607,"sku":"ATL25ISOG3","price":46.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/250250_default_hero.jpg?v=1790350599","url":"https:\/\/superarbor.io\/products\/atlas-atl25isog3-atlas-acfoam-iii-grade-iii-25-psi-polyiso-roof-insulation-2-5-in-x-4-ft-x-8-ft","provider":"Super Arbor","version":"1.0","type":"link"}