Heave stopper – Alternative product to Clayboard & Cellcore

Using Heave Stopper protects your buildings against the forces of ground movement. CLAY HEAVE & GROUND RECOVERY

Groundbeams and slabs can be cracked by the pressure that ground movement causes when concrete foundations are built on shrinkable soils such as clay and expansive shale soils, or when development is on reclaimed land or subject to ground recovery caused by deep excavations.

The structural damage caused by clay is well understood by engineers and designers all over the world. Here in the UK the problem is particularly acute in the South East although climate change is having its effect on soils in other parts of the country.

The solution is to create a space between ground and foundation which soils can expand into.

HEAVE STOPPER – FORMING A TRUE VOID

Unlike other solutions Heave Stopper creates a complete void beneath the foundation to offer maximum protection from ground movement. Heave Stopper is a board constructed from a cardboard honeycomb core set between water resistant facings.

When dry, the boards have a compressive strength that can support concrete and steel up to 1 meter thick without deflection or creep compression. Once the concrete is cured and self supporting, Heave Stopper’s job is done.

Water is now introduced to the core, and in this process Heave Stopper yields to ground heave without transmitting pressure to the structure. Eventually, the board will naturally disappear to leave a permanent 100% void with no residual density to pass on heave stresses.

This can allow engineers to design thinner slabs and beams using less concrete and reinforcement. Heave Stopper can also be used to create a void to protect structures from vibration.

Using Heave Stopper protects your buildings against the forces of ground movement.

MORE BENEFITS OF HEAVE STOPPER: The technical and cost benefits of Heave Stopper make it the complete solution for void creation. • BBA approved • Meets the technical requirements of the NHBC • Suitable for beams & slabs • Cost effective with additional savings on excavation depths, blinding layer and no requirement to blind over boards • The slimmest method of void creation means less excavation • A perfect solution for contaminated land and brownfield sites • Ideal for sites with restricted access • Lowest possible forces transmitted to the structure • Creates a void in excess of the specified requirements

Heave Stopper is delivered on pallets to allow mechanical offload and stacking during storage. Each pallet is protected with a polythene cover. Pallets are manufactured from the same material as Heave Stopper boards and are therefore easily recycled. In addition, there is a range of ancillary items available to ensure total satisfaction for every installation. These include: • Void Pipe • Polythene sheeting • Lay flat tubing • Waterproof tape • Reinforcement spacers

Click here to view Heave stopper brochure

Click here to view Heave stopper BBA