For most basement windows, you will be removing the existing metal or wood frame and installing the glass block panel directly against the masonry wall.

Dear Jim: 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 … ...

A. As people become more concerned about security at home, they are installing more glass and plastic block windows. This is particularly true for first-floor and basement windows where a would-be ...