Q.I am concerned about the security and efficiency of some of my old single-pane, first-floor windows. I think glass block windows would be more secure. Are they efficient and can I install them ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Green plants and shelf in front of glass block windows - Ina Smirnova/Getty Images Glass block windows were trendy in the 1980s, ...

If you’ve been in Pittsburgh for more than a few hours, you’ve definitely seen them. They’re in basement, bathroom and kitchen windows, of course — odds are you have one in your house. But they also ...