{"product_id":"johns-manville-r-38-kraft-fsk-faced-fiberglass-batt-insulation-16-in-x-48-in-42-66-sq-ft-k1244","title":"Johns Manville R-38 Kraft\/FSK Faced Fiberglass Batt Insulation, 16 in x 48 in, 42.66 sq ft (K1244)","description":"\u003ch1\u003eR-38 kraft-faced fiberglass batt insulation\u003c\/h1\u003e\n    \u003cp\u003e\u003cstrong\u003eJohns Manville R-38 faced fiberglass batt insulation is designed for wood-framed attics and ceilings to help reduce heat loss and improve comfort. The kraft\/FSK facing provides a built-in vapor retarder for moisture control, and the batts are pre-cut to fit standard 16 in. on-center framing.\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 Thermal Performance:\u003c\/strong\u003e R-38 batt helps improve energy efficiency in attics and ceilings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-In Vapor Retarder:\u003c\/strong\u003e Faced insulation provides moisture control when installed correctly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSized for Standard Framing:\u003c\/strong\u003e 16 in x 48 in batts are pre-cut for typical 16 in. on-center spacing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSound Dampening Benefit:\u003c\/strong\u003e Fiberglass helps reduce sound transmission for quieter living spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormaldehyde-Free Fiberglass:\u003c\/strong\u003e Made with Formaldehyde-free™ insulation for indoor comfort considerations.\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\/e38d735f-c3c6-4fb5-a859-0fe93120cda4.pdf?v=1766980673\" 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-38\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsulation Material\/Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFiberglass batt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFacing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFaced (kraft\/FSK faced)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBatt Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBatt Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e48 in (4 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage Area per Bag\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e42.66 sq ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage Area (rounded)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e43 sq ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePack Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePieces per Bag\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsulation Location\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAttic; ceiling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsulation Features\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFriction fit; soundproofing insulation; vapor retardant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Install Surface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eConcrete; copper pipes; existing drywall; existing insulation; fiberglass; metal; PVC\/CPVC pipes; PEX pipes; plywood; tile flooring; wood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBag Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.93 ft x 16 in x 16 in\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: Where can this R-38 batt be used?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e It is intended for wood-framed attics and ceilings (and is also commonly used in other framing cavities where R-38 batts are appropriate).\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: What does “faced” mean on this insulation?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e The facing acts as a vapor retarder to help with moisture control when installed per local code and manufacturer instructions.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: What framing size does this fit?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e The batts are 16 in. wide and designed for standard 16 in. on-center framing.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: How much area does one bag cover?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e One bag covers about 42.66 sq ft (often rounded to 43 sq ft).\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: How is it typically installed?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e Batts are placed between joists\/cavities; some faced batts can be stapled via the facing tabs if needed for securement (follow the installation guide and local code).\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003ch2\u003eQuiet Luxury Starts Behind the Walls\u003c\/h2\u003e\n    \u003cp\u003eThere’s a special kind of elegance in a home that feels perfectly tempered—cool when it’s blazing, warm when it’s crisp, and serene all year long. This R-38 faced fiberglass batt brings that layered comfort with a clean, tailored fit for standard framing, plus a built-in vapor retarder to support a well-composed envelope. Use it to refine attic and ceiling zones so the rooms below feel calmer, quieter, and more intentional. It’s the kind of invisible upgrade that makes everyday living feel unmistakably elevated.\u003c\/p\u003e\n    \n    \u003chr\u003e\n    \u003cp\u003e\u003cstrong\u003eUpgrade your attic or ceiling today with Johns Manville R-38 faced batts for efficient comfort and added moisture control.\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cp\u003e\u003ca href=\"https:\/\/superarbor.io\/cdn\/shop\/files\/5c55316c-422a-4f62-9972-769e1860b691.pdf?v=1766980667\" target=\"_blank\"\u003eWarranty\u003c\/a\u003e\u003c\/p\u003e\n    \u003cp\u003e\u003ca href=\"https:\/\/superarbor.io\/cdn\/shop\/files\/947089da-d464-4f16-af97-4755fd86d4a8.pdf?v=1766980670\" target=\"_blank\"\u003eInstallation\u003c\/a\u003e\u003c\/p\u003e","brand":"Johns Manville","offers":[{"title":"Default Title","offer_id":49006750990550,"sku":"31979184347","price":84.42,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0778\/5244\/2838\/files\/14898912.jpg?v=1783712429","url":"https:\/\/buildsupplyus.myshopify.com\/products\/johns-manville-r-38-kraft-fsk-faced-fiberglass-batt-insulation-16-in-x-48-in-42-66-sq-ft-k1244","provider":"Buildsupply","version":"1.0","type":"link"}