Glass blocks make strong, attractive walls and windows that are easy to maintain and keep clean. The blocks are made of two sections of pressed glass fused together with a partial vacuum between them.

Dear James: I want to build a curved glass block wall for a shower stall and a straight one in my kitchen. How do lay a glass block wall so that it will not leak when showering? -- Darlene G.

Dear Nina: Complete glass block window installation kits are available, but it is not difficult to do it yourself using individual glass blocks and mortar. This will result in an extremely strong ...

Q: I am considering installing glass block windows on some first floor ones for security. Is the solid glass energy efficient and can I have some summertime ventilation with them? A: From a security ...