| Euro-glashaus -- European glass blocks and installation systems. |
| Glashaus, Inc. -- Offer a range of designs. Features design guide, online catalog, and distributor locator. |
| Glass Block U.S.A. -- Listing of regional companies supplying glass blocks. |
| International Product Supply -- Source for glass block . |
| Pacific Accent -- Pacific Accent manufactures, through a patented process, the highest quality, most versatile completely assembled real glass block windows & panels available. |
| Pittsburgh Corning -- Pittsburgh Corning Corporation manufactures residential, commercial, and industrial building materials, including glass block and cellular glass insulation. |
| Tafco Corporation -- A complete line of loose and prefabed glass block products. |
