Johns Manville Expands Cool Roof Offering

Johns Manville (JM), a global building and specialty products manufacturer and a Berkshire Hathaway company, announced the availability of a new highly reflective granulated cap sheet called GlasKap® CR G. GlasKap CR G may be used as a cap or flashing sheet in built-up roofing (BUR) systems. Our CR G membranes are surfaced with white reflective minerals and can be installed using standard granulated cap sheet installation methods.

GlasKap CR G joins the larger offering of JM cool roof membrane solutions. These products are approved by FM Global® and Underwriter Laboratories Inc. (UL®). They are also listed with CRRC (Cool Roof Rating Council) and meet current Title 24 requirements.

“Built-up roofing is a core business for Johns Manville Roofing Systems and innovation in the cool roofing segment is vital to our customers,” said BUR Product Manager John Quante. “GlasKap CR G provides an additional option for our customers who want a reflective cap sheet as part of a reliable BUR roof system that is high quality and improves ease of application.”

To learn more about GlasKap CR G and review support materials and related products, please visit the product page at

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About Johns Manville

Johns Manville, a Berkshire Hathaway company (NYSE: BRK.A, BRK.B), is a leading manufacturer and marketer of premium-quality products for building insulation, mechanical insulation, commercial roofing, and roof insulation, as well as fibers and nonwovens for commercial, industrial and residential applications. JM serves markets that include aerospace, automotive and transportation, air handling, appliance, HVAC, pipe and equipment, filtration, waterproofing, building, flooring, interiors and wind energy. In business since 1858, the Denver-based company has annual sales of approximately $2.6 billion and holds leadership positions in many of the key markets that it serves. JM employs approximately 7,000 people and operates 44 manufacturing facilities in North America, Europe and China. Additional information can be found at and

Johns Manville John Quante, 303-978-3319