{"product_id":"knauf-ecobatt-r-11-r-13-unfaced-fiberglass-batt-insulation-3-1-2-in","title":"Knauf EcoBatt R-11 \/ R-13 Unfaced Fiberglass Batt Insulation 3-1\/2 in.","description":"\u003ch1\u003eKnauf EcoBatt R-11 \/ R-13 Unfaced Fiberglass Batt Insulation 3-1\/2 in.\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eKnauf EcoBatt unfaced fiberglass batts in 3-1\/2 in. thickness fit 2x4 walls and are offered as R-11 and R-13 in 16 in. and 24 in. widths. Batts are 96 in. long and sold by the bag with stated coverage per bag. Pair with a vapor retarder where the assembly calls for one, since these batts are unfaced.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eR-11 and R-13 options:\u003c\/strong\u003e Choose R-11 or R-13 thermal performance in the same 3-1\/2 in. thickness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits 2x4 walls:\u003c\/strong\u003e 3-1\/2 in. batt thickness matches standard 2x4 stud cavity depth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16 or 24 in. widths:\u003c\/strong\u003e Available in 16 in. and 24 in. widths to match common framing spacing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnfaced batts:\u003c\/strong\u003e Unfaced brown fiberglass batts for use where a separate vapor retarder is specified.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBag coverage stated:\u003c\/strong\u003e Bags are listed with coverage from 128 to 176 sq. ft. depending on the variant.\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\u003eKnauf Insulation\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 bag of batts, coverage as listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKnauf EcoBatt Unfaced Insulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eR-11 3-1\/2 in. x 16 in. x 96 in. (170.67 SF\/bag); R-13 3-1\/2 in. x 16 in. x 96 in. (128 SF\/bag); R-13 3-1\/2 in. x 24 in. x 96 in. (176 SF\/bag)\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\u003eColor \/ finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBrown (EcoBatt color)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3-1\/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\u003e16 in. or 24 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e96 in.\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-11 or R-13 as listed\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\u003e128.00, 170.67 or 176.00 sq. ft. per bag depending on variant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFacing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnfaced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThermal insulation for framed wall cavities\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\u003eOne bag covers between 128 and 176 sq. ft. depending on the variant: R-11 16 in. covers 170.67 sq. ft., R-13 16 in. covers 128 sq. ft., and R-13 24 in. covers 176 sq. ft. Divide your wall area by the bag coverage and round up.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eFits 2x4 stud cavities at 16 in. or 24 in. on center; pair with a separate vapor retarder or faced product if the code or design requires one. Fastening or friction fitting depends on the framing details.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What R-values and widths are offered?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e R-11 in 16 in. width and R-13 in 16 in. or 24 in. width, all 3-1\/2 in. thick and 96 in. long.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How many bags do I need?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Divide your wall area by the bag coverage: 170.67 sq. ft. for R-11 16 in., 128 sq. ft. for R-13 16 in., or 176 sq. ft. for R-13 24 in.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Are the batts faced?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, these EcoBatt batts are unfaced; add a separate vapor retarder if your assembly requires one.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Will they fit 2x4 walls?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the 3-1\/2 in. thickness is designed for 2x4 stud cavities.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How are they installed?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Press batts friction-fit into the cavity so they fill the depth without compressing, and cut around wiring and boxes with a sharp knife.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003ePick R-13 when the wall spec calls for it; R-11 can suit applications with lower R requirements at the same thickness. Match batt width to framing: 16 in. batts at 16 in. on center and 24 in. batts at 24 in. on center, so edges fill the cavity without bunching. Because these are unfaced, plan vapor control with poly or a smart membrane where required.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eWear gloves, long sleeves, eye protection and a dust mask when handling fiberglass batts to avoid skin and respiratory irritation.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder Knauf EcoBatt unfaced R-11 and R-13 batts for your 2x4 wall insulation package.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Knauf Insulation","offers":[{"title":"R11 Unfaced EcoBatt Insulation 170.67 SF 3-1\/2\" x 16\" x 96\" (price per bag)","offer_id":67587805610351,"sku":"KNB81EV","price":73.39,"currency_code":"USD","in_stock":true},{"title":"R13 Unfaced EcoBatt Insulation 128.00 SF 3-1\/2\" x 16\" x 96\" (price per bag)","offer_id":67587805643119,"sku":"KNX43EVX","price":71.68,"currency_code":"USD","in_stock":true},{"title":"R13 Unfaced EcoBatt Insulation 176.00 SF 3-1\/2\" x 24\" x 96\" (price per bag)","offer_id":67587805675887,"sku":"KNX44E","price":98.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/All-Other-Products-SKU_3942120-primary.jpg?v=1790462811","url":"https:\/\/superarbor.io\/products\/knauf-ecobatt-r-11-r-13-unfaced-fiberglass-batt-insulation-3-1-2-in","provider":"Super Arbor","version":"1.0","type":"link"}