Recycled Foam Glass

Recycled foam glass is used as a lightweight, insulating, sustainable, free-draining sub-base within breathable floor construction, particularly where ground conditions or drainage need careful control. Here at bio space, we can supply all components for a breathable limecrete floor including natural hydraulic lime, natural insulation and other ancillaries, supporting a consistent, vapour-permeable construction from the ground up. We have bulk purchasing options available for larger projects.

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Frequently asked questions
What are the benefits compared to traditional aggregates?

Foam glass is lighter than traditional aggregates while still offering structural support. It improves drainage and adds thermal performance within the same layer. This makes it useful where ground conditions or weight are a concern.
Can recycled foam glass be used in breathable construction?

Yes, recycled foam glass works well in breathable floor systems. It allows moisture movement while preventing capillary rise. This supports long-term moisture balance within the build-up.
Is foam glass aggregate environmentally friendly?

Recycled Foam glass (also known as RFG) is manufactured from recycled glass, often up to 99% content, reducing waste sent to landfills. It is chemically inert and does not degrade over time. This supports long-term use within sustainable construction projects. It also offers fire resistance, achieving Class A1 performance.
Does recycled foam glass provide thermal insulation?

Yes, recycled foam glass offers consistent thermal insulation within sub-base applications. Typical thermal conductivity is around 0.08 W/mK, helping reduce heat loss through floors and foundations. This supports improved overall energy performance.
Is foam glass strong enough for structural use?

Despite being lightweight, recycled foam glass provides reliable load-bearing performance. Compressive strength can exceed 570 kN/m². This helps distribute loads and reduce settlement over time.