A: There are no end and corner blocks available in the 3-inch line, but they are available in the 4-inch line of glass block.
A: These glass blocks can be used for interior or exterior projects so, yes, they may be used in many landscaping projects. However, the block is not load bearing and should not be installed face down. You also do not want to drill or cut into the block as this will break the glass block’s seal and permit condensation on the inside of the block. (Etching for decorative purposes on the surface of the glass block is fine).
A: No. It is simply the block. They come direct from the manufacturer and half of ours come broken.
A: The size and pattern of these blocks are compatible. However, there is a very slight difference in the glass tint, and the Clearly Secure blocks contain a painted white edge coating which helps to brighten the project which Pittsburgh Corning's block did not. If you are installing using the mortar method, it is likely you will not notice a difference in the two blocks, but if you are installing using the silicone assembly method, you would likely not want to install these blocks side by side.