{"product_id":"johns-manville-jmc05rp8-johns-manville-retroplus-1-2-in-x-4-ft-x-8-ft-roof-board","title":"Johns Manville RetroPlus 1\/2 in. x 4 ft. x 8 ft. Roof Board","description":"\u003ch1\u003eJohns Manville RetroPlus 1\/2 in. x 4 ft. x 8 ft. Roof Board\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eThis is a Johns Manville RetroPlus roof board in a 4 ft. x 8 ft. panel, 1\/2 in. thick, for commercial low-slope roofing assemblies. One sell unit is a single panel. Use it as a roof board within JM roofing systems; attachment hardware is per the JM assembly specification.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge panel format:\u003c\/strong\u003e 4 ft. x 8 ft. panel covers more area per board for faster installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCode listed:\u003c\/strong\u003e UL Classified, FM Approved, and Miami-Dade County Approved.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASTM standard:\u003c\/strong\u003e Meets ASTM C728, Type 3.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManageable weight:\u003c\/strong\u003e Approximately 17.7 lb gross weight per panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJM system component:\u003c\/strong\u003e Part of the Johns Manville roofing insulation and cover boards lineup.\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 panel, 1\/2 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\u003eRetroPlus Roof 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, 1\/2 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 panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePerlite roof board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApprovals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUL Classified; FM Approved; Miami-Dade County Approved; ASTM C728, Type 3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17.7 lb gross per panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCommercial low-slope roofing insulation\/cover board\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 4 ft. x 8 ft. panel covers 32 sq ft of roof area. Divide total roof area by 32 and add a waste allowance for cuts.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eIntended for Johns Manville commercial roofing assemblies under JM membranes. Fasteners, plates or adhesives are sold separately per the JM system specification.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What comes in one order?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One 1\/2 in. thick, 4 ft. x 8 ft. RetroPlus roof board panel.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How much area does one panel cover?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e 32 sq ft; divide the roof area by 32 to estimate panel count, plus waste for cuts.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Which approvals does it carry?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e UL Classified, FM Approved, Miami-Dade County Approved, and it meets ASTM C728, Type 3.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How is it attached?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Per the specified JM roofing assembly, typically with mechanical fasteners and plates or approved adhesive, sold separately.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How heavy is a panel?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The listed gross weight is approximately 17.7 lb per panel.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eThe 4x8 RetroPlus format suits open-field reroofing where larger boards speed coverage, while the 4x4 variant is handier around congested roofs. Verify the board is accepted in your specified JM assembly and follow the printed fastening pattern. Keep boards dry and flat until the membrane goes down.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eUse proper lifting technique and OSHA-compliant fall protection when handling and installing roof boards on commercial roofs.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eGet the Johns Manville RetroPlus 1\/2 in. 4 ft. x 8 ft. roof board for efficient retrofit roof coverage.\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":53521634623855,"sku":"JMC05RP8","price":21.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/retroplus-roof-board_bce8bbc0-ac80-42a9-8107-c8e623bdd4c6.png?v=1790181359","url":"https:\/\/superarbor.io\/products\/johns-manville-jmc05rp8-johns-manville-retroplus-1-2-in-x-4-ft-x-8-ft-roof-board","provider":"Super Arbor","version":"1.0","type":"link"}