{"product_id":"johns-manville-dynabase-hw-fiber-glass-reinforced-sbs-base-or-ply-sheet-black-39-3-8-in-x","title":"Johns Manville DynaBase HW Fiber Glass-Reinforced SBS Base or Ply Sheet, Black, 39-3\/8 in. x 49 ft. 2 in.","description":"\u003ch1\u003eJohns Manville DynaBase HW Fiber Glass-Reinforced SBS Base or Ply Sheet, Black, 39-3\/8 in. x 49 ft. 2 in.\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eJohns Manville DynaBase HW is a fiber glass-reinforced base or ply sheet used in a variety of multi-ply roofing systems. The roll measures 39-3\/8 in. x 49 ft. 2 in. and comes in Black with a fine mineral parting agent on top and a polyolefin burn-off film on the bottom for heat welding. Its SBS rubber and asphalt blend gives the sheet elasticity and installation ease.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase or ply use:\u003c\/strong\u003e Used as a fiber glass-reinforced base or ply sheet in a variety of multi-ply roofing systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSBS elasticity:\u003c\/strong\u003e High-quality SBS rubber and asphalt blend lends elasticity and flexibility, with elongation and recovery that accommodate roof movement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiber glass mat:\u003c\/strong\u003e The fiber glass reinforcement mat offers excellent dimensional stability and tensile strength and withstands differential movement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo thermal memory:\u003c\/strong\u003e Because the mat has no thermal memory, less time is needed to relax the sheet, allowing easier installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat weldable:\u003c\/strong\u003e A polyolefin burn-off film on the bottom side enables application using heat welding techniques.\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 roll, 39-3\/8 in. x 49 ft. 2 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDynaBase HW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSBS rubber and asphalt blend with fiber glass reinforcement mat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor \/ finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack, fine mineral parting agent on top side\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable colors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 color: Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e39-3\/8 in. x 49 ft. 2 in. per roll\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\u003eApproximately 162 sq ft per roll before laps and waste\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBase or ply sheet in multi-ply (BUR and modified bitumen) roofing systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeat welding via polyolefin burn-off film on the bottom side\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 39-3\/8 in. x 49 ft. 2 in. roll covers roughly 162 sq ft of nominal area. Deduct specified side and end laps and add a waste allowance when calculating rolls per job.\u003c\/p\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003eDesigned for use within Johns Manville multi-ply roofing systems, typically under a granule-surfaced cap sheet such as DynaLastic 180 FR. Cap sheets, adhesives, primers and flashing materials are sold separately; follow the JM system specification for attachment.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What is included with this order?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e One roll of DynaBase HW base or ply sheet, 39-3\/8 in. x 49 ft. 2 in., in Black.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How is this sheet applied?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The polyolefin burn-off film on the bottom enables heat welding application techniques.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: How much area does a roll cover?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e A roll covers about 162 sq ft nominal; subtract laps and waste for net coverage.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Why does no thermal memory matter?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The fiber glass mat has no thermal memory, so the sheet relaxes faster and installs more easily than mats that curl back.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Can it serve as both base and ply?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, DynaBase HW is designed for use as either a base or ply sheet in multi-ply systems.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eDynaBase HW is a workhorse base\/ply sheet when the spec calls for fiber glass reinforcement and heat-weldable application. Its dimensional stability makes it forgiving on decks with differential movement, and the faster relaxation time can save labor on large fields. Pair it with an SBS cap sheet such as DynaLastic 180 FR to complete a compatible multi-ply assembly.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHeat welding involves open-flame or hot-air equipment; follow hot-work safety procedures, keep extinguishers on hand and use roof fall protection.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder Johns Manville DynaBase HW fiber glass-reinforced base or ply sheet for your next multi-ply roof.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Johns Manville","offers":[{"title":"Default Title","offer_id":53524442055023,"sku":"JMDBHW","price":96.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/JMDBHW_0.jpg?v=1790284142","url":"https:\/\/superarbor.io\/products\/johns-manville-dynabase-hw-fiber-glass-reinforced-sbs-base-or-ply-sheet-black-39-3-8-in-x","provider":"Super Arbor","version":"1.0","type":"link"}