{"product_id":"knauf®-r-21hd-kraft-faced-fiberglass-batt-insulation-15-in-x-93-in-67-81-sq-ft","title":"Knauf® R-21HD Kraft Faced Fiberglass Batt Insulation, 15 in x 93 in (67.81 sq-ft)","description":"\n    \u003ch1\u003eR-21 kraft-faced fiberglass batt insulation\u003c\/h1\u003e\n    \u003cp\u003e\u003cstrong\u003eKnauf® R-21 high-density fiberglass batt insulation with kraft facing helps improve thermal comfort and sound control in walls, floors, and ceilings. Designed for quick handling with tear resistance and fast recovery for a snug fit, it covers 67.81 sq-ft per package.\u003c\/strong\u003e\u003c\/p\u003e\n    \u003chr\u003e\n    \u003ch2\u003eKey Features:\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eHigh R-Value Performance:\u003c\/strong\u003e R-21 high-density fiberglass batt helps reduce heat transfer for improved comfort.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKraft Facing Vapor Retarder:\u003c\/strong\u003e Kraft facer provides a vapor permeance rating of 1.0 or less when properly installed behind an approved finish material.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast, Clean Handling:\u003c\/strong\u003e Cuts easily, resists tears, and is designed to install quickly with low dust.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSnug-Fit Resilience:\u003c\/strong\u003e Recovers quickly to full thickness to help fill cavities evenly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Application Use:\u003c\/strong\u003e Suitable for attic, basement, ceiling, crawlspace, floor, and wall installations.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003ePlease check the Product Data Sheet \u003ca href=\"https:\/\/superarbor.io\/cdn\/shop\/files\/Knauf_468051_Catalog.pdf?v=1766980681\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003eHere\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\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\u003eR-Value\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eR-21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e93 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFiberglass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFacing Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKraft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage Area\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e67.81 sq-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBrown\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e400 deg F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation Locations\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAttic; Basement; Ceiling; Crawlspace; Floor; Wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResists\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAdditional Information\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStaple-Free\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePro Cut Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSub Brand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePerformance+®\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVapor Transmission (Permeance) Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0 or less\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSound Control\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExcellent sound control; designed for partition walls or other applications where facing will be covered\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFire Safety Note\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKraft facing will burn and should not be left exposed; install kraft facing in contact with approved finish material\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 cavities does this batt fit?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e It’s 15 in wide and 5-1\/2 in thick, designed for typical 2x6 wall\/floor\/ceiling cavities; length is 93 in per batt.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: Where can I install this insulation?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e It’s listed for attic, basement, ceiling, crawlspace, floor, and wall applications.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: Does the kraft facing need to be covered?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e Yes—kraft facing will burn and should not be left exposed; install it in contact with an approved finish material.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: What is the coverage per package?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e One package covers 67.81 sq-ft.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: Is it a vapor retarder?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e Yes—the kraft vapor retarder is noted as having a permeance rating of 1.0 or less.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003ch2\u003eQuiet confidence, wrapped in kraft\u003c\/h2\u003e\n    \u003cp\u003eThink of this batt as the invisible luxury: a calmer, more tempered room that feels intentionally composed. The kraft-faced finish brings a crisp, tailored edge behind the walls—technical, yes, but also quietly refined. Use it to elevate bedrooms, studios, or media spaces where hush and comfort are part of the aesthetic. It’s the kind of behind-the-scenes essential that makes a home feel effortlessly elevated.\u003c\/p\u003e\n    \n    \u003chr\u003e\n    \u003cp\u003e\u003cstrong\u003eUpgrade comfort and sound control in your walls and ceilings with Knauf® R-21 kraft-faced high-density fiberglass batts.\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cp\u003e\u003ca href=\"https:\/\/superarbor.io\/cdn\/shop\/files\/Knauf_468051_Warranty_Information_e534df0a-7ca7-422e-8d3a-24706782ad09.pdf?v=1766980676\" target=\"_blank\"\u003eWarranty\u003c\/a\u003e\u003c\/p\u003e\n    \u003cp\u003e\u003ca href=\"https:\/\/superarbor.io\/cdn\/shop\/files\/Knauf_468051_Instruction_Installation_Manual_f240d5aa-5e24-4706-bb62-d1ecf182f7a9.pdf?v=1766980678\" target=\"_blank\"\u003eInstallation\u003c\/a\u003e\u003c\/p\u003e\n    ","brand":"Knauf®","offers":[{"title":"Default Title","offer_id":52533914960239,"sku":"7.25387E+11","price":90.83,"currency_code":"USD","in_stock":true}],"url":"https:\/\/superarbor.io\/products\/knauf%c2%ae-r-21hd-kraft-faced-fiberglass-batt-insulation-15-in-x-93-in-67-81-sq-ft","provider":"Super Arbor","version":"1.0","type":"link"}