GLASS BLOCK WINDOWS Walls, shower stalls, full mortar joints. 10-Year guarantee! Insured, free estimates. B&C Glass Block 412-795-3890 PA011868 6St00L9=oupp GLASS BLOCK WINDOWS Walls, shower stalls, full mortar joints. 10-Year guarantee! Insured, free estimates. B&C Glass Block 412-795-3890 PA011868 6St00L9=oupp