Glass bricks are widely used as a building and architectural material and can replace ordinary bricks. Inside there is a vacuum and their typical shape is that of the rectangular parallelepiped, with the most common dimension 19x19x8cm. In addition to the common glass blocks, there are also the corner (90 degree) and the terminals. Terminal glass blocks, single or double terminals, with a curved surface of one or two sides respectively, are used at the edge of the wall, when it must be free in space.

The main advantages of glass blocks are the following:

• Photopermeability – Plenty of light up to 75%
• Thermal insulation
• Sound insulation
• High impact resistance and safety
• They do not need plastering and painting
• Replace windows where prohibited
• They can be ventilated either with the special metal windows that are tilted and instead of glass they contain glass bricks either with the ventilated glass bricks (ventiblocks) or with the plastic windows
• Easy installation