Glass Brick， also known as glass block, is a hollow block of glass, usually translucent with textured faces; has relatively low thermal-insulation and low fire-resistance value; used in non-load-bearing walls.
Glass Brick is two sheets of pate glass with an air space between them, formed into a sealed modular hollow block; laid up with mortar, similar to masonr blocks as a modular material; comes in several distinct styles, patterns and degrees of transparency and translucency.
Glass Bricks are manufactured as two separate halves and whilst the glass is still molten, the two pieces are ressed togetherand annealed. The resulting glass blocks will have a partial vacuum at thehollow centre.
Renovation of Glass Brick
Bullet and vandal resistance
Bullet and vandal resistant Bricks are generally solid glass or have very thick side walls similar to pavement blocks.
Fire resistance of varying degrees can be achieved by several methods. Standard production of glass brick will offer little fire resistance; however, resistance is improved by utilising specially produced hollow blocks with thicker sidewalls, or the inclusion of a special layer of fire resisting material between the two halves of the block during manufacture. Some manufacturers of glass blocks have developed a method of bonding two glass blocks together with adhesive, producing blocks of up to 160 mm (6½") thick with enhanced fire resistance. It is important that the block manufacturer's recommendations are followed with regards to the installation of fire resisting glass block walls, as without special construction techniques, the wall will not achieve the desired fire resistance.
A recent innovation in the manufacture of glass bricks is the inclusion of argon gas within the hollow centre of glass wall blocks. This advancement in production technique has resulted in a glass block which is able to offer significantly improved thermal insulation properties.
Some glass bricks are available in coloured variants. These coloured variants fall into two categories; those that are manufactured with coloured glass which are UV stable and can be used in the same locations as standard clear glass blocks. The other method by which coloured glass blocks are achieved is to inject a coloured material, dye or transparent paint into the hollow centre of the blocks to form a permanent coating. This method of producing coloured blocks enables vibrant colours to be achieved which are not possible with coloured glass. The downside of this production method is that the coloured coating may not be UV stable and can fade in bright sunshine over time and may therefore, not be suitable for all locations.
Glass Bricks are more and more populare in modern construck while new functions are developed.