{"product_id":"johns-manville-jmc05rt8-johns-manville-retro-fit-perlite-based-roof-cover-board-0-5-in-x-4-ft-x-8-ft","title":"Johns Manville Retro-Fit Perlite-Based Roof Cover Board, 0.5 in. x 4 ft. x 8 ft.","description":"\u003ch1\u003eJohns Manville Retro-Fit Perlite-Based Roof Cover Board, 0.5 in. x 4 ft. x 8 ft.\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eThis is a Johns Manville Retro-Fit perlite-based roof cover board in a 0.5 in. thickness and 4 ft. x 8 ft. panel size, sold per piece. It creates a smooth substrate for a new low-slope roofing membrane installed over an existing roof. One board covers 32 sq. ft., so plan 4.5 boards per roofing square plus waste.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge-format panel:\u003c\/strong\u003e 4 ft. x 8 ft. panel size covers 32 sq. ft. per board, reducing the number of joints on the roof.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerlite-based core:\u003c\/strong\u003e Manufactured from perlite-based material for use as a cover board in commercial low-slope roofing assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUL Classified:\u003c\/strong\u003e This item is UL Classified.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFM Approved:\u003c\/strong\u003e This item is FM Approved.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMiami-Dade approved:\u003c\/strong\u003e Approved by Miami-Dade County for use in roofing applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASTM C728 Type 2:\u003c\/strong\u003e Meets ASTM C728, Type 2, the standard specification for perlite-based roof insulation.\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\u003eJohns Manville\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 board, 0.5 in. x 4 ft. x 8 ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRetro-Fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePerlite-based cover board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 ft. x 8 ft., 0.5 in. thick\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.5 in.\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\u003e32 sq. ft. per board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplicable standards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUL Classified; FM Approved; Miami-Dade County Approved; ASTM C728, Type 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15.71 lb per board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoof cover board for low-slope commercial roofing assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQXO category\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoofing Insulation\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\u003eEach 0.5 in. x 4 ft. x 8 ft. board covers 32 sq. ft. of roof area. Allow 4.5 boards per 100 sq. ft. (one roofing square) plus cutting waste around penetrations and edges.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eDesigned for use in Johns Manville commercial roofing systems as a cover board over an existing roof before installing JM membranes, adhesives and fasteners\/plates. Membranes, fasteners, plates and adhesives are sold separately; verify fastening pattern with the specified JM system assembly.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What is included in this listing?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One 0.5 in. x 4 ft. x 8 ft. Johns Manville Retro-Fit perlite-based cover board, sold per piece.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How many boards do I need for a roofing square?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Each board covers 32 sq. ft., so about four and a half boards cover a 100 sq. ft. square before cutting waste.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is this board rated for code and insurance requirements?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, this item is UL Classified, FM Approved, Miami-Dade County Approved and conforms to ASTM C728, Type 2.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the advantage of the 4x8 size over the 4x4?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The 4 ft. x 8 ft. panel has fewer joints per square, which can speed installation, while the 4x4 is easier to handle in tight areas; both are the same 0.5 in. product.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How heavy is each board?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Each board weighs approximately 15.71 lb.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eThe 4 ft. x 8 ft. Retro-Fit board is the go-to size for open field areas of a roof recover, minimizing seams; keep 4 ft. x 4 ft. boards on hand for perimeter work and small cut-ins. Order 4.5 boards per square plus waste. Confirm the fastener and plate pattern specified for your JM membrane system, since attachment requirements vary by wind zone.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eFollow fall-protection requirements and the membrane system manufacturer's installation instructions when working on commercial roofs.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder the Johns Manville Retro-Fit 0.5 in. x 4 ft. x 8 ft. perlite cover board for fewer joints on your roof recover.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eProduct Documents:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.jm.com\/content\/dam\/jm\/global\/en\/commercial-roofing\/products\/assets\/application-guide\/rs-9417-product-weight-chart.pdf\" target=\"_blank\" rel=\"noopener\"\u003eInstallation Guide (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.jm.com\/content\/dam\/jm\/global\/en\/commercial-roofing\/products\/assets\/brochure\/rs-5134-perlite-advantages-sell-sheet-french.pdf\" target=\"_blank\" rel=\"noopener\"\u003eProduct Data Sheet (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.jm.com\/content\/dam\/jm\/global\/en\/commercial-roofing\/products\/assets\/sds-sui\/200000001890-us-1x.pdf\" target=\"_blank\" rel=\"noopener\"\u003eSafety Data Sheet (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Johns Manville","offers":[{"title":"Default Title","offer_id":53521626530159,"sku":"JMC05RT8","price":20.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/half-inch-retro-fit-board.png?v=1790180859","url":"https:\/\/superarbor.io\/products\/johns-manville-jmc05rt8-johns-manville-retro-fit-perlite-based-roof-cover-board-0-5-in-x-4-ft-x-8-ft","provider":"Super Arbor","version":"1.0","type":"link"}