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Foamglas® is a high-quality thermal insulation material manufactured primarily from recycled glass (>60%) and natural raw materials.


  • Warm roofing systems.
  • Green roofs, parking decks.
  • Roof decks.
  • Ventilated façades.
  • Indoor insulation.
  • Floor insulation in industrial environment.
  • Ground and perimeter insulation.


  • Waterproof, consisting of closed cell cellular glass. Does not absorb any moisture and does not swell.
  • Cannot rot and is pest-proof because it is inorganic.
  • High compressive strength even with long-term loads due to its cell geometry without deformation.
  • A1 non-combustible (to BS EN 13501), consisting of pure glass. In the event of fire, does not develop smoke or toxic gases.
  • Vapour-tight, consisting of hermetically sealed glass cells. Constant thermal insulation value over decades. Prevents the penetration of radon.
  • Dimensionally stable; neither shrinks nor swells. No warping, buckling or creep. Low coefficient of expansion, nearly equal to that of steel and concrete.
  • Resistant to organic solvents and acids because it consists of pure glass.
  • Free of environmentally damaging flame-retardants, protection agents, propellants and consists of over 60 % of high value recycling glass. Only regenerative electricity is used in the manufacturing process.

Related literature

The following content references this product:

Standard product features

Thermal conductivity:

  • Foamglas® Ready Board T4+: ≤ 0.041 W/m²K.
  • Foamglas® Wall Board F: ≤ 0.050 W/m²K.
  • Foamglas® Wall Board S3: ≤ 0.045 W/m²K.
  • Foamglas® Wall Board T4+: ≤ 0.041 W/m²K.
  • Foamglas® Wall Board W+F: ≤ 0.038 W/m²K.


Technical characteristics:

  • Composition: Pure glass with a high percentage of recycled glass, inorganic and without binding agent additions.
  • Applicable limit temperatures: -260 to +430 °C.
  • Melting point (cf. DIN 4102-17): >1000 °C.
  • Water absorption: 0 (aside from the surfaces in the area of the attached cells).
  • Biological influences: Resistant against microbes as well as against rodent and piercing animals, insects/ vermin.
  • Water vapour diffusion resistance figure: μ = ∞.
  • Capillarity and hygroscopicity: None.
  • Fire behaviour (BS EN 13501-1): A1.
  • Dimensional stability: Does not swell and shrink, warp or creep.
  • Airborne sound reduction: 28 dB at 100 mm thickness (in the mid range frequency area).

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-45-50/325 Cellular glass insulation board

Product specification

An important note about specifying





+44 (0)20 7492 1731

Product reference

[Foamglas® Ready Board T4+]
Green Guide Rating: A.
[Foamglas® Wall Board F]
Green Guide Rating: B.
[Foamglas® Wall Board S3]
Green Guide Rating: A.
[Foamglas® Wall Board T4+]
Green Guide Rating: A+.
[Foamglas® Wall Board W+F]
Green Guide Rating: A+.


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Manufacturer details

31-35 Kirby Street,
Hatton Garden,
London, EC1N 8TE
Tel +44 (0)20 7492 1731
Fax +44 (0)20 7492 1730
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NBS National BIM Library