75mm Jablite Claymaster Clay Heave Protection Board

The 75mm Claymaster Jablite Clay Heave Protection Board is a compressible expanded polystyrene void-fill solution engineered to protect building foundations from clay heave, soil movement, and subsidence risks. This moisture-resistant EPS board acts as a critical buffer layer beneath ground structures.

When installed around pile caps, the 75mm Claymaster board absorbs pressure from expanding and contracting clay soils, reducing stress on ground beams and preventing structural damage. The lightweight pink EPS material wraps foundation elements to counteract the effects of seasonal clay movement.

Shrinkable clays contain fine mineral particles that swell when wet and crack when dry—a phenomenon known as clay heave. This cyclical expansion and contraction can cause serious foundation problems over time. The 75mm Claymaster board mitigates these pressures, providing long-term structural protection.

Measuring 2400mm x 1200mm with a coverage area of 2.88m², this durable board installs easily without specialist equipment. Available in 50mm, 75mm, and 100mm thicknesses (150mm, 200mm, and 300mm available to order), it suits most on-site requirements.

Product specification

Brand: Jablite®

Model: 75mm Claymaster

Thickness: 75mm

Width: 1200mm

Length: 2400mm

Coverage: 2.88m2

Weight: 2.16kg

Dimensions: 2,400mm x 1,200mm x 75mm (other sizes available to suit beam dimensions)

Colour: Pink

Material: Expanded Polystyrene (EPS)

Profile: Compressible-fill clay eps board

Shipping method: Rigid Vehicle ǀ Courier

Applications: Piled Ground Beams ǀ Foundations

BBA Certified: Yes

Soil heave potential: Medium

Features: Against Clay Heave ǀ Foundations

Safe load: 20 kN/m2

Manufacturer: Jablite Claymaster®

Fail load: 40 kN/m2 produce 50% compression

Jablite Claymaster Highlights

1. Straightforward installation without complex procedures.
2. Demonstrates strong resistance to water absorption and moisture damage.
3. Constructed from lightweight expanded polystyrene foam material.
4. Reduces bearing pressure on ground beam structures.
5. Prevents lateral foundation movement from soil expansion.
6. Delivers reliable, long-term protection against clay heave problems.
7. Distinctive pink finish enables quick identification during construction.
8. Guards against foundation settlement caused by shrinkage and ground movement.
9. Requires no specialist labour or heavy machinery for fitting.
10. Achieves A+ rating in the BRE Green Guide to Specification.
11. Supplied in multiple thickness variants to match project needs.
12. Certified by BBA and meets NHBC building standards.
13. Minimises lateral forces transmitted through the foundation system.

Application

1. Supporting concrete ground beams up to 600mm depth.
2. Installation beneath piled foundations and structural elements.
3. Reinforcing the vertical surfaces of deep trench foundation systems.
4. Counteracting clay soil expansion (clay heave) to protect building integrity throughout its lifespan.

Certification

75mm Jablite has been independently assessed by the British Board of Agrement under Regulation A2. Testing confirms its effectiveness in managing clay soil expansion pressures that threaten structural stability. The product is approved for use beneath ground beams and on the sides of deep-trench fill foundations. Certificate Number: 90/2543.

Benefits Of Expanded Polystyrene

1. Excellent Thermal Insulation: EPS insulation effectively reduces heat transfer, enhancing energy efficiency.
2. Lightweight: Its low density makes it easy to handle and install, adding minimal weight to structures.
3. Moisture Resistance: Inherently resistant to moisture, maintaining insulation properties over time.
4. Versatile: Available in various forms, allowing for customization to fit specific construction needs.
5. Sound Dampening: Contributes to a quieter indoor environment by dampening sound transmission.
6. Durable: Resistant to pests, molds, and fungi, ensuring long-lasting performance.
7. Cost-Effective: Affordable option with good thermal performance, suitable for budget-conscious projects.
8. Environmentally Friendly: Recyclable and often produced with recycled content, reducing environmental impact.
9. Easy Installation: Lightweight and easy to cut, facilitating fast and straightforward installation.

Info

Browse our complete Jablite range and refine by thickness or coverage area using the left-hand filters. For product suitability advice or bulk pricing enquiries, contact our team by phone on +4402038839057, email sales@insulationbee, or use Live Chat. We offer the lowest UK Claymaster Board prices.