Glass block window panels come ready to install, with the blocks mortared together and secured with a metal band. All you have to do is set the panel in place and pack mortar in around it.

Dear James: There have been break-ins in my neighborhood, so I want to install glass block windows for security. What are some tips for installing mortar-type glass blocks? — Nina D.

Another venting option, ideal for bathrooms, is casement-style glass block windows. These are units that fit into the wall opening. They often use lightweight plastic blocks instead of the heavier ...