Insulating lightweight
foamed glass aggregate

Foamglass 40

High Quality Insulating Foam glass aggregate

Manufactured by Foamed Glass UK, North Yorkshire at the UK’s first foam glass manufacturing plant, which is the largest plant in the world!

Foamglass 40 is a lightweight, free draining, thermally insulating and load bearing material made from 100% recycled purified glass.

Foamglass 40’s high compressive strength means it compacts less than alternatives on the UK market e.g. 45m2 at 150mm requires 8m3 of Foamglass 40 compared to 10m3 of alternative foam glass products. 

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Case Studies

Chorley Old Hall
Insulated Floor

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Lambeth Palace
insulated floor

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Insulating Floors as part of Passive House Construction

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Green Roof build
Foamit as a lightweight filler

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Foamed Glass Uses

The principle difference between Foamglass 40 and other foamed glass products on the UK market is its far higher compressive strength. This ensures greater structural properties, less compaction, greater density and smaller cell structure allowing for a thinner layer of foam glass and screed.

With a 70 kg vibrating compactor, Foamglass 40 compacts by 5% which is up to 20% less compaction compared to other foam glass products on the UK market. Foamglass 40’s high compressive strength means it compacts less than alternatives on the UK market e.g. 45m2 at 150mm requires 8m3 of Foamglass 40 compared to 10m3 of alternative foam glass products. The most common use for foam glass in the UK is an insulated clean sub-base to a limecrete floor. Normally laid at a depth of 100-250mm, with a 100mm limecrete screed. We've included below diagrams of suggested build-ups using lime screed, underfloor heating and drainage.

See our U value Calculator to calculate your quantities

Information on Foamed Glass

Unit

Foamglass 40

Aggregate mm 20-40mm
Loose Weight (Dry) kg/m3 230-280
Capillary Water Suction Height mm 160-180mm
Thermal Conductivity W/mk 0.1
Bulk Crusching Resistance N/mm2 > 0.9
Resistance to Disintergration % 0.97
Design Density kN/m3 3.0
Bulk Density with Compaction Kg/M3 300-370
Purity % <1% Organic substances
Compression Strength
(repose)
N/mm2 >0.9
Resistance to Fire Incombustable A1
Carbon Footprint eq/m3 45-55
Technical Standard BSEN

BSEN 13055 

BSEN 13242


Case Studies

The site has up to date case studies of Foam Glass being used for:

  • Insulating below floors in renovation

  • Insulating Floors as part of Passive House Construction

  • Green roof construction

  • Light weight back filling

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