# Claymaster Clayheave Protection Board – 2400 × 1200mm – Sold per Sheet

Jablite Claymaster (Clay Heave Protection) is a product that provides protection against clay heave. Shrinkable clays are soils containing a large proportion of mineral particles of less than 0.002mm in diameter. This produces an extremely cohesive soil type when wet, but shrinks to a crumbly, crazed structure when dry. The expansion and contraction process during wet and dry periods is known as ‘clay heave’. This can cause severe problems with foundations.  
  
Jablite Claymaster works by surrounding the pile cap with a layer of low-density, compressible, expanded polystyrene, reducing pressure on the ground beams as the surrounding clay expands and contracts.

**Benefits**

-   A permanent solution to clay heave problems
-   Easy to install
-   Negligible compression during concrete casting
-   No need for specialist trades or equipment
-   Resistant to moisture
-   Lightweight
-   Durable
-   A+ rated in the BRE Green Guide to Specification

### Size

Pack Quantity: 6

## Details

- **Price:** 12.25 GBP - 23.39 GBP
- **Vendor:** BEWI INSULATION & CONSTRUCTION UK LTD
- **Type:** Insulation Boards
- **Tags:** Building Materials, Clay Protection, Insulation, Insulation Boards, Local

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 50mm | 12.25 GBP | In stock |
| 75mm | 18.38 GBP | In stock |
| 100mm | 23.39 GBP | In stock |

## Images

- Claymaster Clayheave Protection Board – 2400 × 1200mm – Sold per Sheet

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> Source: [Carvers Building Supplies](https://www.carvers.co.uk/products/claymaster-clayheave-protection-2400x1200-x-50mm-sold-per-sheet)
> Updated: 2026-06-05