How did Chopped Fiberglass come to the Roofing Industry


Roofmaster was approached by a gentleman named Jay Johnson in the late 1950’s, early 1960’s who had developed a chopped fiberglass gun.  His company, Glas-Craft, was located in Montrose, California.  They had

Original Glassmaster Gun

developed an air operated gun that was capable of chopping fiberglass roving into pieces anywhere from 1/2″ to 4″ long and then coating with epoxy.  Their main business was using this technology to make fiberglass chickens, horses and other products that businesses would put on display.  As it turned out, Jay used his gun to make a fiberglass catamaran, which he named “The Glass Slipper”.  He entered it in the 1966 Trans-Pacific Yacht race from Los Angeles to Hawaii and won the race on his first try.

With Glas Craft’s help, Roofmaster was able to develop a gun to chop fiberglass, blow it through a delivery tube and two spray tips to coat it with emulsion or white coatings.  The fiberglass strengthened the system and was able to help repair damaged roofs.

Glassmaster Gun

Backpack Rover Holder

Since, the Glassmaster gun has gone through some transitions and modifications to make it a little more user friendly.  Roofmaster makes the unit in their Monterey Park plant.  It comes in a lockable wooden case for protection.  It comes with a set of straps and an ergonomically placed handle.  We furnish extra anvil rollers as they wear as the blades index into them to fracture the fiberglass.  We also offer a Back Pack to hold the box of roving.  It includes a feed tube that funnels the roving to the chopper motor.

Typical usage is approximately 3# of fiberglass and 9 gallons of material per 100 square feet.  In addition to a material pump for the coatings, the Glassmaster requires a compressor with at least 20 cubic feet capacity per minute.

There are contractors that specialize in this type of roof surface.  It strengthens the roof while sealing it.


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2 Responses to “How did Chopped Fiberglass come to the Roofing Industry”

  1. How did Chopped Fiberglass come to the Roofing Industry | Says:

    […] full post on Always On Top Tags: Chopped, come, Fiberglass, Industry, Roofing Posted in Roofmaster […]

  2. Roofing Jacksonville Says:

    great blogpost

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