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 ...

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 ...

I want to replace some old single-pane first floor windows with glass block windows for security. Are they as efficient as other new windows, can they be opened, and can I install them myself? Glass ...

Dear James: It would be easy for a thief to break through our utility-room window. I think a glass block window would be better. Is it difficult to install a mortar-type glass block window or is a kit ...

Green plants and shelf in front of glass block windows - Ina Smirnova/Getty Images Glass block windows were trendy in the 1980s, and believe it or not, they were actually making a comeback then.