{"product_id":"rockwool-comfortbatt-r-21-unfaced-mineral-wool-batt-insulation-5-1-2-in-x-15-1-4-in-x-47-in-39-82-sq-ft","title":"ROCKWOOL Comfortbatt R-21 Unfaced Mineral Wool Batt Insulation 5-1\/2 in x 15-1\/4 in x 47 in (39.82 sq-ft)","description":"\u003ch1\u003eR-21 Unfaced Mineral Wool Batt Insulation\u003c\/h1\u003e\n    \u003cp\u003e\u003cstrong\u003eROCKWOOL Comfortbatt is an unfaced stone wool batt designed for wood and steel stud cavities to improve thermal comfort and energy efficiency. Its flexible edge friction-fits for easier installation while helping maintain R-value, and it also provides fire resistance, moisture resistance, and sound absorbency.\u003c\/strong\u003e\u003c\/p\u003e\n    \u003chr\u003e\n    \u003ch2\u003eKey Features:\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFlexible Edge Fit:\u003c\/strong\u003e Friction-fits into stud bays for easier installation and helps prevent over-compression to maintain R-value.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire Resistant Stone Wool:\u003c\/strong\u003e Non-combustible insulation that won’t promote flame spread or develop toxic smoke when exposed to fire.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture Resistant:\u003c\/strong\u003e Helps resist water and moisture for more durable performance in wall and ceiling cavities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSound Absorbing Comfort:\u003c\/strong\u003e Excellent sound absorbency to help reduce noise transfer between spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHealth-Conscious Certification:\u003c\/strong\u003e GREENGUARD Gold Certified to support a healthier indoor environment.\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\/ROCKWOOL_169082_Specification_Sheet_5a696bdc-30f9-4af2-877a-be745118991b.pdf?v=1766980667\" 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\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eROCKWOOL®\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Line \/ Sub-brand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eComfortbatt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBatt Insulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMineral Wool (Stone Wool)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFacing Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnfaced\u003c\/td\u003e\n\u003c\/tr\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\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\u003eWidth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15-1\/4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e47 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage Area\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e39.82 sq-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCeiling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExterior wood and steel stud applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConstruction Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWood Stud Construction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDensity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026gt; 2 lb\/cu-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGREENGUARD Gold Certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarning\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCalifornia Proposition 65 warning (www.P65Warnings.ca.gov)\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: Is this batt faced or unfaced?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e It is unfaced mineral wool batt insulation.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: What size stud bays is it intended for?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e The batt is 15-1\/4 in wide and is intended for standard stud cavities of that width.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: What is the R-value and thickness?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e It is R-21 and 5-1\/2 in thick.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: Where can it be installed?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e It’s listed for ceiling installation and is designed for exterior wood and steel stud applications.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003cp\u003e\u003cstrong\u003eQ: How much area does one package cover?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eA:\u003c\/strong\u003e 39.82 sq-ft coverage per package.\u003c\/p\u003e\n    \u003chr\u003e\n    \n    \u003ch2\u003eQuiet, resilient comfort—built into the bones of the home\u003c\/h2\u003e\n    \u003cp\u003eGreat interiors feel effortless, and that starts with what you don’t see—layers that temper sound, heat, and the drama of daily living. Comfortbatt’s unfaced stone wool and flexible edge slip neatly into stud bays, creating a tailored envelope that holds its R-value without fuss. Use it to refine bedrooms, media rooms, and exterior walls where calm and consistency matter most. It’s a foundational luxury: performance, comfort, and peace—architected from within.\u003c\/p\u003e\n    \n    \u003chr\u003e\n    \u003cp\u003e\u003cstrong\u003eUpgrade your walls or ceilings with ROCKWOOL Comfortbatt for long-lasting R-21 comfort, sound control, and fire-resistant peace of mind.\u003c\/strong\u003e\u003c\/p\u003e\n    \n    \u003cp\u003e\u003ca href=\"https:\/\/superarbor.io\/cdn\/shop\/files\/ROCKWOOL_169082_Instruction_Installation_Manual_34708512-2a8f-4d86-8c76-b491cc0f94e1.pdf?v=1766980665\" target=\"_blank\"\u003eInstallation\u003c\/a\u003e\u003c\/p\u003e","brand":"ROCKWOOL®","offers":[{"title":"Default Title","offer_id":49006751711446,"sku":"RXCB55152547R21","price":48.45,"currency_code":"USD","in_stock":false}],"url":"https:\/\/buildsupplyus.myshopify.com\/products\/rockwool-comfortbatt-r-21-unfaced-mineral-wool-batt-insulation-5-1-2-in-x-15-1-4-in-x-47-in-39-82-sq-ft","provider":"Buildsupply","version":"1.0","type":"link"}