Foam Glass Insulation Aggregate: GEOCELL®

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LABC Registered Foam Glass Gravel by GEOCELL® made from 100% recycled glass.


Foam glass insulation aggregate (or gravel) by GEOCELL® is extremely versatile because of its unique characteristics of light weight, load bearing, draining and insulating properties.

Foamed glass aggregate is a sustainable replacement building material in:


Below is a table comparing some of the specifications of different foam glass brands.

It is important to understand that since the compressive strength of standard subsoil is around 200 kN/m², this is the limiting factor, not the compressive strength of the foam glass itself. Given that the foam glass has a higher compressive strength than the soil it is resting on, we consider the important value is the Lambda value, which is a measure of thermal conductivity. The lower the figure, in W/mK, the better the insulation capability of the foam glass. Click on the table for a full pdf.

Foam Glass Comparison Table

Foam Glass Comparison Table

GEOCELL® foam glass aggregate is an insulation material for underground structures. Foamed glass aggregate saves energy and contributes to a comfortable indoor environment. It is both economical and environmentally sound.

Foamed glass insulation aggregate is used in the same way as coated clay aggregate, but is capable of being used as a load bearing hardcore. It also offers better insulation (lambda/k value = 0.08 – approximately 20% better in thermal performance than lightweight expanded clay aggregate). It therefore needs less depth for a similar thermal performance.


the large number of enclosed cells in each foam glass pellet, ensures excellent insulation characteristics. lambda = 0.08 w/mK.


due to its glass cell structure, GEOCELL® provides excellent compressive strength.


cellular glass is comprised of internal closed cells that do not absorb water. Classified as an A1 building material.


stability, durability, resistance against insects and rodents.


made from 100% recycled glass inert and essentially pH-neutral.


CE mark: GEOCELL® declaration that the product meets the requirements of the applicable EC directives.


GEOCELL® is quicker to install than conventional methods cutting construction time and cost.

The selection of appropriate insulation material is especially crucial in old buildings. GEOCELL® foam glass combines a drainage layer and insulation in a single product, thus reducing building height. Moreover, GEOCELL® is diffusible, an important property for an insulating material when humidity is an issue. Suitable for thermal insulation under the foundation slab of single/multi family houses, production halls, schools, swimming pools etc.

GEOCELL® is completely unaffected by water and environmentally green. GEOCELL® is made from waste glass that can be reused or recycled at any time.

For examples of GEOCELL® foam glass insulation aggregate used as part of  limecrete floor systems, including Mike Wye & Associate’s GlassCrete, please visit

Design & Quotation Service.

It can be complicated figuring out volumes and U-values. Just tell us what you need and we will work it out for you. We can calculate all the design information you need for your floor: thickness, insulation values etc. using our accredited design programme, along with full delivered material quotes.

Please enter your details below, with a short message if you like, and we will contact you to discuss your requirements. Or phone us if you prefer, on 01409 281644

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GEOCELL® 1 m3 2 m3 3 m3 *
Ave weight 150 kg 300 kg  450 kg
Bulk Bags £88.00 £176.00 £POA
Loose Loads Available direct to site up to 90 m3 per load (rolling floor truck). Prices from £75/m3

*Please note: 3 m3 bulk bags are available only by special delivery, as they are too tall for normal delivery methods. You will also need offload capability on site.

Prices exclude VAT and delivery.