Claymaster (also known as Claylite) is a high-performance, low-density expanded polystyrene (EPS) sheet, specifically designed to protect foundations against ground heave caused by clay soil expansion. It acts as a compressible void former, reducing pressure on structures from soil movement. Commonly used in trench fill foundations, ground beams, pile caps, and basement retaining walls, Claymaster is ideal for below-ground applications in clay-rich soils.

FEATURES & BENEFITS

• Effective Heave Protection – Absorbs upward pressure from expanding clay soils, preventing damage to foundations and ground beams.

• BBA Approved – Certified for use in the UK and compliant with NHBC building regulations for clay sites.

• Lightweight & Easy to Cut – Simple to transport, handle and shape on-site with minimal tools.

• Moisture Resistant – Closed-cell EPS structure resists water absorption, ideal for below-ground use.

• Large Sheet Size – Each board measures 2400mm x 1200mm, covering 2.88m² for faster installation with fewer joints.

• Versatile Application – Suitable for trench fill foundations, pile caps, ground beams, and basement retaining walls in clay-rich ground conditions.