Glass block is a really neat feature to have in a variety of locations, and the nice thing is that glass block installs easily. Tim Carter of AsktheBuilder.com demonstrates how glass blocks are installed without using mortar. Tackle your glass block installation projects with these tips. They now have plastic spacers which go between each glass block which makes installation simple. These spacers are attached using silicone caulk. Since installing glass block windows is so much easier now, you can use them for many different projects. Watch this AsktheBuilder.com video for further details.