Johns Manville

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. Additional information can be found at

717 17th St.
Denver, CO 80202 US

Additional Locations:
7500 Dutch Rd.
Waterville, OH 43566 US
(800) 554-4826

Johns Manville Slovakia a.s. Strojarenska 1
Trnava, 91799 SK
+421 335 918249

Berkshire Hathaway


As Seen In CompositesWorld

Do we need a new definition for SMC?
Side story to SMC: Old dog, more tricks.

SMC in transportation

SMC: Old dog, more tricks
In the sheet molding compound renaissance, the advent of new resins and compounds are broadening the definition and application of this versatile family of composites.

Johns Manville ThermoFlow 641 chopped strands.

Johns Manville introduces food-safe rovings, chopped strand mat
Johns Manville (JM, Denver, CO, US) reports that its MultiStar 264 rovings for sheet molding compound (SMC) reinforcements comply with regulation (EC) No 10/2011 (plastics regulation) and is suitable for use in materials and articles intended to be used in contact with food.

In praise of technical service reps
Tech service representatives: without them, molding trials fail and manufacturing issues go unresolved.

IACMI unveils nine-meter wind turbine blade
A large team of 11 industrial partners provided materials and on-site fabrication support for blade component manufacturing and assembly.

JEC World 2016 exhibition and product previews
JEC World 2016 will be held in Paris March 8-10. These are some of the products that will be found at the show.

Johns Manville expands US glass fiber capacity
Fiberglass specialist Johns Manville will expand its glass fiber operations plant in Etowah, TN, US, to service the increasing needs of the engineered thermoplastics industry.

SPE’s ACCE 2014 preview
Automotive composites a hot topic in the Motor City.

Fraunhofer Project Centre for Composites Research @ Western announces advisory board
Charter members of the board include what Western calls "game-changing leaders from the fields of chemical and materials engineering, as well as visionary thinkers from the automotive and machinery sectors."

Reactive glass fiber for thermoplastic composites
At JEC Europe 2013, Johns Manville said its new, engineered reactive glass fiber is expected to improve performance in structural thermoplastic composite applications.

JEC Europe 2013 new product showcase
The JEC Europe 2013 trade show (March 12-14, at the Paris Expo, Porte de Versailles, Paris, France) was the venue for introductions of a large number of new composite materials, technologies and manufacturing processes. Here's the CT editorial staff's compilation of what was on display.

Hybrid thermoplastic molding: Toughening automotive composites
Tailored D-LFT with continuous and discontinuous glass offers best combination of strength, moldability.

Johns Manville to expand fiberglass production in Slovakia
The expanded furnace at the Johns Manville facility in Trnava, Slovakia, is expected to start up in fourth quarter 2012 and will increase production of selected glass fiber products by up to 40 percent.

JEC Composites Paris: 2011 Product Showcase
The news from this annual Parisian in-gathering of composites professionals is heavily weighted toward automotive lightweighting.

BMW 5-series UBS

UBSs: Coming to North America
 Common in Europe and Asia, the composite underbody shield might finally catch on in the U.S. and Canada.

Braided Pressure Vessel

JEC Composites 2009 showcase
 Despite the doleful state of the global economy, the turnout in Paris — exhibitors and visitors — proved surprisingly strong.

JEC Composites 2007 Product Showcase
This year’s Parisian exhibition provides key evidence of the composites industry’s unprecedented breadth and technical sophistication.

Pultrusion, SMC Rovings
Johns Manville (Bad Homburg, Germany) has introduced StarRov 908 rovings for high-speed pultrusion applications. The rovings have been designed with a package of surface sizings formulated to improve coupling with a variety of resin systems, such as unsaturated polyester, vinyl esters and epoxies. It’s also said to

Three bobbins of continuous-filament basalt roving, ready for transport to a customer.

Basalt Fibers: Alternative to Glass?
High-temperature performance and superior strength properties may make this late-comer a better choice in some applications.

Product Categories of Johns Manville

  • Fibers, inorganic
    • E-Glass
  • Reinforcements, unimpregnated
    • E-Glass
      • E-Glass, Chopped strand
      • E-Glass, Mat, chopped strand
      • E-Glass, Roving, gun
      • E-Glass, Roving, multi-end
      • E-Glass, Roving, panel
      • E-Glass, Roving, single-end direct
      • E-Glass, Surfacing veil
      • E-Glass, Other
  • Fabrics, unimpregnated
    • E-Glass
      • E-Glass, Plain-weave
  • Coatings and sizings
    • Other coating materials