Cellular Glass


Glass is a solid, fragile and hard amorphous material, generally transparent. It can present different colours depending on the components used in its manufacturing process.

It is obtained by fusion of siliceous sand—its main component—at 1500ºC; then sodium carbonate or sulphate is added so that it melts at a lower temperature; limestone to prevent glass from de-composing in water and recycled glass so as to cut manufacturing costs and other raw-materials consumption.

How is cellular glass made?

By mixing feldspar and recycled car-windscreen glass in a 70% a special glass is produced continuously which is then cooled and milled until a very fine glass powder is obtained. After milling, a certain amount of carbon is added to this powder and then the mixture is dosed into moulds which are then placed inside a furnace at around 1250ºC.

Carbon is oxidised which creates gas bubbles resulting in an expansion of the mass. A slight excess of carbon explains the dark colour of the product. This way the cellular structure of the material is achieved; then it is released from the mould and placed inside an annealing furnace. The obtained blocks are cut to the desired dimensions, verified and packed.

Properties of cellular glass

  • Resistant to aggressive products, organic solvents and most acids.
  • Waterproof and water-vapour proof.
  • High compressive strength.
  • Dimensional stability and undeformable.
  • Easy to work on and cut.
  • Non-combustible.
  • Resistant to microorganisms, bacteria, rodents, birds and plagues in general.
  • Fibre-free, HCFC-free and CFC-free.
  • Completely ecological from its production until its recycling.

Cellular glass in FoamLime system

The core of the FoamLime system is made of cellular-glass panels. Its thickness can vary depending on the required thermal resistance for a given climatic region.

It is extremely rigid and extremely fragile which turns it into a very demanding material and limited when it comes to combining it with other materials.

Cellular glass technical information


Prefabricated cellular-glass panels in accordance with UNE EN 13167:2001 Standard, density 125 kg/m3 and dimensions of 600x450 in thickness from 40 to 180 mm.

Reaction to Fire (DIN EN 13501-1) EuroClass A1.
Service Temperature Limit From -260ºC a +430ºC.
Water Vapour Resistance (EN ISO 10456) μ = ∞
Higrometry: 0.
Capilarity: 0.