{"product_id":"gaf-dens-deck-prime-roof-cover-board-1-2-in-x-4-ft-x-8-ft-sheet","title":"GAF Dens-Deck Prime Roof Cover Board 1\/2 in. x 4 ft. x 8 ft. Sheet","description":"\n    \u003ch1\u003ePre-primed gypsum roof cover board sheet\u003c\/h1\u003e\n    \u003cp\u003e\u003cstrong\u003eGAF Dens-Deck Prime is a pre-primed gypsum roof cover board designed to provide a durable, high-performance surface for commercial roofing assemblies. It helps improve bonding for membranes and can serve as an effective fire and thermal barrier layer in many roof systems.\u003c\/strong\u003e\u003c\/p\u003e\n    \u003chr\u003e\n    \u003ch2\u003eKey Features:\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePre-Primed Surface:\u003c\/strong\u003e Factory-primed facing helps promote stronger bond performance for roofing membranes and adhesives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire \u0026amp; Thermal Barrier Layer:\u003c\/strong\u003e Designed to perform as an exceptional fire barrier and thermal barrier in roofing assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Cover Board Protection:\u003c\/strong\u003e Adds protection against punctures and jobsite abuse compared with using insulation alone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture-Resistant Design:\u003c\/strong\u003e Engineered for enhanced moisture resistance to support long-term roof assembly performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommercial Roof System Compatibility:\u003c\/strong\u003e Intended for use as a cover board\/re-cover board in a variety of commercial roofing applications.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n    \u003chr\u003e\n    \u003ch2\u003eSpecifications Table:\u003c\/h2\u003e\n    \u003ctable\u003e\n        \u003cthead\u003e\n            \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\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n            \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGAF 1\/2\" Dens-Deck Prime 4X8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e62GADDP128\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInsulation \u0026amp; Weatherproofing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoof Cover Boards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUnit of measure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSH - Sheet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNominal thickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/2 in.\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\u003eProduct type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCover board \/ re-cover board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePre-primed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePerformance description\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExceptional fire barrier, thermal barrier, and re-cover board; pre-primed surface to make the bond even stronger.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCore\/facing (supplementary)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFiberglass mat with high-density gypsum core (described with EONIC technology).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFlame spread \u0026amp; smoke developed (supplementary)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0\/0 when tested to ASTM E84.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWater absorption by weight (supplementary)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5% max.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurface water absorption (supplementary)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0 gram nominal (both sides).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePermeance (supplementary)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;30 perms (\u0026gt;1710 ng\/Pa•s•m²).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompressive strength (supplementary)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e900 psi nominal.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMold resistance (supplementary)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10\/10.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eR-value (supplementary)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.28 (°F•ft²•hr\/BTU).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFlexural strength, parallel (supplementary)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≥40 lbf (178 N).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBending radius (supplementary)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 ft (1219 mm).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth tolerance (supplementary)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 ft (1219 mm) ± 1\/8 in (3 mm).\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n    \u003c\/table\u003e\n    \u003chr\u003e\n    \u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: What size is each sheet?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e Each board is 4 ft. x 8 ft. and sold as a sheet.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: What is the thickness?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e This product is 1\/2 inch thick.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: What is Dens-Deck Prime typically used for?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e It’s used as a commercial roof cover board\/re-cover board to provide a durable, bond-friendly surface under roofing membranes.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: Does it have a primed surface?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e Yes—Dens-Deck Prime has a pre-primed surface intended to enhance bonding.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: What material is it made from?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e Supplementary product information describes it as a fiberglass-mat, high-density gypsum-core roof board.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003ch2\u003eA Quiet Foundation for Bold Rooflines\u003c\/h2\u003e\n    \u003cp\u003eThink of this cover board as the unseen couture understructure of a roof—clean, composed, and engineered to elevate everything layered above it. The pre-primed surface is the detail that matters, creating a more confident bond and a crisper finish for high-performance membranes. Use it to refine the build-up in demanding commercial projects where durability and resilience can’t be negotiable. It’s the kind of essential that makes “luxury” feel effortless—because it’s built into the bones.\u003c\/p\u003e\n    \n    \u003chr\u003e\n    \u003cp\u003e\u003cstrong\u003eChoose GAF Dens-Deck Prime to add a tough, pre-primed cover board layer that helps strengthen membrane bonding and protect your roof assembly.\u003c\/strong\u003e\u003c\/p\u003e\n    \n    \n    ","brand":"GAF","offers":[{"title":"Default Title","offer_id":52580571283823,"sku":"62GADDP128","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/eE9IWjBoT0Fia085aGZOOEtTTmI0dy9zVkR2dkhfbFBFZUxsMjdQeGViZFdRL09yaWdpbmFsL2RlbnNkZWNrLXByaW1lLXJvb2YtYm9hcmRzLTczOHg0MTVfNC5qcGc_e83c614f-d322-4e01-bb09-ae600d69b50d.jpg?v=1768439976","url":"https:\/\/superarbor.io\/products\/gaf-dens-deck-prime-roof-cover-board-1-2-in-x-4-ft-x-8-ft-sheet","provider":"Super Arbor","version":"1.0","type":"link"}