Fiberglass Mat for Glass Reinforced Plastic (GRP)

Glass fiber nonwovens, also called glass mats or glass veils, can be used for exterior sheathing, in fireboards and for roof deck cover boards.

Depending on the requirements, glass fiber nonwovens can improve moisture and mold resistance, add structural strength, provide superior fire resistance and enhance the long-term performance of gypsum boards. Selecting the right glass fiber nonwoven is critical to achieving the desired performance, securing an excellent bonding with the gypsum core and preventing slurry penetration to the board surface.

Philippe Bekaert
Global Portfolio Leader

"Johns Manville supplies a wide range of Evalith® glass fiber nonwoven facers to the gypsum board industry, providing weather resistance to exterior sheathing, fire resistance to gypsum fireboards and superior strength to roof deck cover boards. "

What is a Fiberglass Mat?

A fiberglass mat (also called glass veil or glass nonwoven) is a flat fabric composed of chopped fiberglass oriented in a random pattern and bonded together. Originally invented to replace cardboard in waterproofing membranes, fiberglass mats have long since conquered additional applications such as commercial and residential construction, energy storage and automotive. Fiberglass mat can be tailormade to fit the properties the end applications require by adjusting for instance the fiberglass (glass type, fiber sizing, fiber length, fiber diameter, fiber mixture), the binder systems, the mat thickness, and the mat density. Fiberglass mat is sold in rolls of various widths and lengths. Most of the glass fiber mats manufactured worldwide are produced on similar (but not identical) machines to those used in the paper industry.

Ignacio Nuñez-Zorriqueta
Technology Leader

"Did you know that Johns Manville has three technical centers working on getting the best glass fiber nonwoven designed for your specific needs?"

ISO Certificates

Safe Use Instructions

Tim Swales
Chief Sustainability Officer

"Johns Manville is a pioneer in glass fiber nonwoven production and provides superior products to various industries since decades with production in Europe and the U.S. Our three technical centers and pilot lines provide everything needed for successful tailor-made product developments. Going the #JMextraMile is what we do day-by-day: in production, with our global multi-lingual customer service teams and by literally everybody in the JM community."