Jablite Claymaster 175mm x 2400mm x 1200mm (Pack of 3)
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Jablite Claymaster 175mm x 2400mm x 1200mm (Pack of 3)


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Order now and get free delivery on all Jablite orders over £300 ex vat.

Estimated Delivery Time Of 7-10 Working Days

Jablite Claymaster is an EPS (expanded polystyrene) compressible-fill material recommended in decreasing the pressure applied to foundations caused by clay heave.  It can prevent potential problems in foundations due to moisture and damp found in soil which can cause large proportions of mineral particles under 0.002mm to shrink or expand - this is what we call clay heave. Jablite Claymaster is fixed to the fronts of deep trench fill and then to the base and facets of concrete beam piled foundations to help prevent any movements caused by the shrinking and expanding of the surrounding soil.

Claymaster does not deteriorate when placed in high moisture areas and is resistant to freeze-thaw impacts making it durable in any climate. Jablite Claymaster will stay in good shape and hold the compressible fill for the lifespan of the building. It is not just lightweight and easy to install but requires no special PPE whilst fitting or cutting. Rot-proof and highly durable, it is the go-to infill material for foundations chosen by builders for decades.

The foundation construction and soil backfill completely guard Jablite Claymaster. The clay heave protection has no effect on the fire performance of the structure it is installed into. Jablite Claymaster emits zero ozone depletion potential (ODP) and less than 5 units in global warming potential (GWP). Jablite Claymaster does not create any identified risk to the climateand is a 100% recyclable material. 

Key Features

  • Economically efficient solution
  • Long-lasting
  • Easy to install & handle
  • Lightweight
  • Negligible compression during concrete casting
  • 100% recyclable
  • Moisture-resistant: Yes
  • Rot Proof: Yes
  • Pack of 3 boards


  • Brand: Jablite
  • Length: 2.4m
  • Thickness: 175mm
  • Width: 1.2m
  • Coverage: 8.64m2 per pack


Store at a cool temperature and handle carefully to prevent breakage before installation. Cover with a weather-proof tarpaulin in case of outdoor storage.


Jablite Claymaster has CE marking the product following harmonised European Standard BS EN 14933 and is certified under e British Board of Agrément Certificate number 90/2543. Claymaster is classified as Euroclass E flame-retardant material and achieves an A+ rating in the BRE Green Guide.  


Frequently Asked Questions

What is Jablite Claymaster used for? Jablite Claymaster is specifically designed as a compressible-fill material to reduce pressure on foundations caused by clay heave, which can lead to structural issues due to soil moisture changes.

How does Jablite Claymaster resist moisture and freezing? Made from expanded polystyrene (EPS), Jablite Claymaster is moisture-resistant and can withstand freeze-thaw cycles, ensuring durability and long-term performance in various climates.

Is Jablite Claymaster easy to install? Yes, Jablite Claymaster is lightweight and easy to handle, making it simple to install without requiring special equipment or protective gear during fitting or cutting.

Is Jablite Claymaster environmentally friendly? Absolutely, Jablite Claymaster has zero ozone depletion potential (ODP) and minimal global warming potential (GWP). Additionally, it is 100% recyclable, making it a sustainable choice for foundation protection.

How long does Jablite Claymaster last? Jablite Claymaster is designed to hold compressible fill for the lifespan of the building, providing long-lasting foundation protection against clay heave and soil movements.

Does Jablite Claymaster affect the fire performance of structures? No, Jablite Claymaster's clay heave protection does not impact the fire performance of the structures it is installed into, ensuring safety and compliance with fire regulations.

    Length 2.4m
    Width 1.2m
    Thickness 175mm
    Brand Jablite

    Est Delivery between and .

    Delivery will always take place on a weekday (Mon - Fri).
    For more information on delivery visit our delivery info page.

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