Foamglas Sheet Insulation

Credit: Pittsburgh Corning

What makes this product green?

  • Reduces heating and cooling loads
  • Avoids hazardous ingredients
  • Low-emitting
  • Reduces pesticide treatments


Foamglas® cellular glass insulation from Pittsburgh Corning is 100% glass, made with sand (60%), limestone (20%), soda (15%), and trace minerals (5%). It contains no HCFCs and can be used for insulating roofs, walls, and below-grade applications, including beneath slabs. Foamglas is impervious to moisture, inert, resistant to insects and vermin, strong, and has an R-valueMeasure of resistance to heat flow; the higher the R-value, the lower the heat loss. The inverse of U-factor. of R-3.44 per inch. The high compressive strength makes it particularly appropriate for roof decks, green roofs, and parking decks. Unfaced Foamglas is produced in 18" x 24" dimensions in thicknesses from 1-1/2" to 6" in 1/2" increments. A bitumen-faced product (Readyboard) is available in 2' x 4' dimensions with the same thickness options.

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Manufacturer Information

Pittsburgh Corning
800 Presque Isle Dr.
Pittsburgh, PA 15239
Phone: 724-327-6100
Fax: 724-387-3807
Toll-free: 800-545-5001

Listed in: Board Insulation