GEOCELL foam glass aggregate is an insulation material for underground use. Recycled foam glass aggregate saves energy and also contributes to a comfortable indoor environment, an ecological alternative for insulation to building floors.
Foam glass aggregate is available in 1m³ and 2m³ bags, but can also be supplied loose in quantities up to 90m³ for larger projects (dependent on access). Please get in contact with our friendly team to discuss the most suitable options for your project. (Please note delivery prices are postcode specific and can vary.)

GEOCELL Foam Glass Uses

Foam glass aggregate (or gravel) is quite versatile because of its unique lightweight, load bearing, draining and insulating properties providing a sustainable replacement for conventional building materials.
Foamed glass aggregate is a ecological construction material that can be used for:

• Limecrete floors
• Insulation under floor slab  (with strip foundation)
• Insulated foundations
• Landscaping and void filling
• Floor structure without base plate (without screed)
• French Drains

Foam Glass Properties

• Aggregate size – 10/60
• Minimum compacted depth – 120mm
• Compaction – 1.3 : 1 (30%)
• Excellent thermal resistance capability – Certified conductivity of 0.08 W/(mK)
• High compressive strength – 275 kN/m²
• Light weight – Approx 150 kg/m³
• Closed cell – Non-capillary
• Fire resistance – incombustible Class A1

The Production Process of Foam Glass

The production process of GEOCELL Foam Glass Aggregate is a fascinating journey from recycled glass to a versatile building material. Here’s an overview of the steps involved:

• Collection and Cleaning: The process begins with the collection of post-consumer recycled glass. This glass is thoroughly cleaned to ensure it contains less than 1% non-glass contaminants.
• Milling: The cleaned glass is then milled into a superfine powder. This step is crucial as it prepares the glass for the sintering process.
• Mixing with Foaming Agent: The glass powder is measured and mixed with a foaming agent. The foaming agent will help the glass expand and form the cellular structure of foam glass.
• Sintering: The mixture is then conveyed into ovens where it undergoes sintering at high temperatures, around 900°C. This heat causes the glass powder to expand and transform into foam glass.
• Cooling and Formation: As the foam glass exits the kiln on a conveyor belt, it cools down. During this cooling phase, tension cracks occur, which helps in breaking down the material into gravel-sized pieces of foam glass aggregate.
• Packaging: Finally, the foam glass aggregate is packaged into big bags of various volumes, ready for transportation and use in construction projects.

This process not only recycles waste glass but also creates a product that is lightweight, insulating, and environmentally friendly, making GEOCELL Foam Glass Aggregate a sustainable choice for modern construction.

GEOCELL Foam Glass Gallery

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St Astier Natural hydraulic lime – Learn from the past, build today and shape tomorrow

About NHL’s

St Astier Natural hydraulic lime is used to make mortar mixes and plasters (and screeds) which are generally more sympathetic than sand/cement mortars. This is particularly beneficial for use in traditional buildings for maintaining breathability.
100% pure Natural Hydraulic Lime by Saint-Astier®.

St Astier NHL 5 – The Roman Lime

• Right balance between elasticity and mechanical performance
• Ideal in exposed areas (coastal zones, cols areas, facades at risk)
• Allows hygrometric exchange maintaining a high vapour permeability
• Resistance to sulphates and salts

Suitable For:
Lime concrete/screeds (Limecrete floors), injection, grouting, rendering, masonry, pointing, capping, mass wall bedding, foundation, sea defence walls, chimney stacks, new build (masonry). Before starting, always try on a small test area.

St Astier NHL 3.5 – The Versatile Lime

• Respects the colour of the local sands
• Versatile
• Compatible and resistant to plaster and salt-saturated substrates
• Resistance to sulphates and salts

Suitable For:
Lathwork, lime concrete, injection, grouting, rendering, pointing, capping, masonry, ashlar.
Before starting, always try on a small test area.

St Astier NHL 2 – The Chalk Lime

• Suitable for feeble substrates
• Promotes hygrometric exchange
• Reduces plaster shrinkage
• Ideal for trowel finishes

Suitable For:
Lath work, grouting, rendering, pointing, plastering, ashlar. Before starting, always try on a small test area.

Saint-Astier

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Forced action mixers are an essential piece of equipment for any site. By ensuring that the materials are thoroughly mixed, forced action mixers help to create a consistent, high-quality finished product. With a forced action mixer from Baron, you get the best of both worlds – power and performance in one simple design. The variable speed control allows for personalized mixing needs while still providing enough torque to tackle any job that comes your way!
Whether you are a professional contractor or a DIY enthusiast, forced action mixers can help you achieve superior results. With their help, you can create beautiful, long-lasting surfaces that will stand up to the elements and look great for years to come.

E120 forced action mixer – 2.0kW 1x240V

This robust and efficient forced action mixer has many advantages. Its large 2.0 kW powerful maintenance-free motor, strong frame and good ergonomics make it a great choice.
• Rubber wheels for higher comfort.
• Tight and robust opening system.
• Positioning bolt prevents unintended cover closure.
• Easily interchangeable mixer head.
• Easy to clean and easy to maintain.

E200 forced action mixer – (110V)

This model has a mixing capacity of 160 litres and a weight of 180kg, so it is ideal for medium-large resin mixes. 200 litre drum capacity, 160 litre /150kg / 6 bags mixing capacity
• Large and robust 2.2kW motor
• Can be used by one man
• Optimum mixing capacity and handling
• Security protection at the outlet
• Easy to clean and maintain
• Easily loaded

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The geotextile membrane is used for separation layers on Limecrete floors that incorporate GEOCELL foam glass aggregate. This is positioned onto the sub-soil bellow the foam glass, then a second layer over the top once the foam glass is compacted.

Available Sizes
100m roll x 4.5m wide
1m unit x 4.5m wide (supplied by the running metre)

Other Uses
MultiTrack is a thermally bonded or needle punched non-woven geotextile that offers many benefits where separation, filtration and drainage functions are required.
It delivers excellent durability and drainage function in addition to its very high water flow capability, but reduced strength in comparison to a woven geotextile. It can also be used for erosion control and protect membranes from being punctured. Ideal for roads, car parks, coastal defences and drainage systems.

Separating/strengthening layer under access roads and areas of hard standing
Filter surround for trench drains
Separation to stop the intermixing of dissimilar soil layers
Filtration – allowing the flow of water whilst preventing the passage of soil
Horse arenas – separation of infill materials
Filter surround for infiltration tanks

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Biaxial Geogrid is used for attaching underfloor heating pipes on Limecrete floors that incorporate GEOCELL foam glass aggregate.

Available Sizes
50m roll x 4m wide
1m unit x 2m wide (supplied by the running metre)

The Geogrid is laid out over the Geotextile membrane that is wrapped around the compacted GEOCELL foam glass aggregate. The Geogrid can then be used to secure the underfloor heating pipe with either clip rails or cable ties to secure the pipes in place before the screed is installed.

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Cork Insulation Boards are a premium choice for eco-conscious builders and homeowners seeking a natural, sustainable, and high-performance insulation solution. Made entirely from natural and renewable cork, these boards offer a unique combination of thermal efficiency and acoustic performance, making them an ideal choice for a variety of applications.

Key Features:

• Natural Material: Harvested from the cork-oak tree, which regenerates every 9 years, ensuring a sustainable supply.
• Thermal Efficiency: With a low thermal conductivity (λ=0.037 – 0.040 W/mK), cork boards provide excellent energy savings.
• Acoustic Performance: The boards’ structure naturally dampens sound, offering superior acoustic insulation.
• Vapour Permeable: Allows buildings to ‘breathe’, contributing to a healthier living environment.
• Chemical-Free: Free from synthetic resins and carcinogenic materials, cork insulation is non-toxic and safe for indoor use.
• Versatile: Suitable for insulating walls, roofs, and floors, and available in various thicknesses to meet different requirements.

Available sizes:

20mm x 500mm x 1000mm (15m² pack)
30mm x 500mm x 1000mm (5m² pack)
40mm x 500mm x 1000mm (4m² pack)
60mm x 500mm x 1000mm (2.5m² pack)
80mm x 500mm x 1000mm (2m² pack)
100mm x 500mm x 1000mm (1.5m² pack)

30mm and 40mm boards also supplied as individual sheets, mainly for perimeter insulation for Limecrete floors.

Installation is straightforward, with boards easily cut to size and applied to surfaces. They can be used in conjunction with other systems for enhanced insulation and are compatible with various finishes.

Whether you’re insulating a new build or upgrading an existing structure, Cork Insulation Boards are a smart investment towards a comfortable, energy-efficient, and environmentally friendly home.

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Plastering hair or fibres are typically added to backing coats of plasters and renders, this gives extra strength and minimises shrinking and cracking.

Goat hair Kg (loose) – Backing coat reinforcement particularly onto lath.
Plastering Fibres Kg – Backing coat reinforcement for plasters and renders onto masonry.

Screed Fibres for Limecrete Floors

Screed fibres are added to the screed mix for Limecrete floors for extra reinforcement, we recommend 1Kg of fibres per cubic metre of lime screed for floors with normal use.

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Cardewmires Washed Quarry Sand

Cardewmires quarry sand is a 0-4mm grit sand that’s used in our standard hot lime mortar, but can also be used for making other mortars and screeds. Available in tonne bags or 25kg bags.

Nosterfield Washed River Sand

Nosterfield river sand is a 0-4mm grit sand that’s used for making hot lime mortars, but can also be used for making other mortar mixes and screeds. Available in tonne bags or 25kg bags.

Appleton Yellow Sand

Appleton Yellow Sand is a 0-2mm building sand that’s used for making hot lime mortar blends mixed with washed sharp sand, but also as a general building sand. Available in tonne bags.

Limestone Dust

Limestone dust is 0-4mm granitic limestone dust, it’s highly versatile and a decent substitute for sharp sand. Limestone dust is crushed limestone that can be used as a sub-base for paving and artificial grass. Due to its fine consistency it can be easily compacted and makes for a smooth, flat and firm surface for various applications. 4mm to dust limestone can also be used more widely in construction, for example as a binding agent added to MOT type 1 where the aggregate is too loose.
Available in tonne bags.

Moist Silica Sand

A washed and graded high quality silica sand used for making hot lime plasters, available in 25kg bags.

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