- Brand: WHITEROCK® Construction Products
- Model: HS160 Heave Stopper
- Dimensions: 2,400mm x 1,200mm x 160mm
- SKU: HS160 Clay heave board
- Product code: P1-2411
- MPN: HS160
160mm Heave Stopper Clayboard is a construction void former, an alternative to Dufaylite Clayboard and Cordek Cellcore that is suitable for Ground Beams and Slabs to protect foundations against ground movement.
Heavestopper 160mm is a BBA certified 2400mm x 1200mm environmentally friendly honeycomb board used to create a void underneath the foundation for ultimate stability in ground liable to ground heave.
Ground beams, slabs and concrete foundations can be subject to cracking as a result of the forces of ground movement when built on areas of shrinkable soil.
160mm Heave Stopper is an eco-friendly, recycled collapsible void former with maximum strength of 120kn/m2, that protects against ground movement whilst laying concrete foundations.
When the honeycomb core is introduced to water it is designed to lose its strength in order to permit ground heave without transmitting pressure to the foundations or structures above.
Heave Stopper 120kn/m2 is calculated and calibrated for concrete thickness up to 1000mm (the slimmest method of void creation means less excavation, muck away, vehicle movements and landfill).
The structural damage caused by clay is acknowledged by engineers and designers all over the world.
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.
Heave Stopper 160mm can also be used horizontally and vertically to create a void to protect structures from vibration.
Clay Heave Protection Board Heave Stopper is an easy to install and simple to work with and doesn't have much dust off when cut on site.
Shrinkage potential of HS160 (Heave Stopper 160mm) is classified as high with WHITE colour code and plasticity index between 40-60.
The board’s mechanical properties have been independently tested at the BRE Innovation Park.
Tests show that the initial saturation procedure leaves just 10mm of material in the void zone.
Ultimately a 100% clear void is created which is in excess of the specified requirements and with zero kN/m2 of transmitted force.
Board Coverage: 2.88m2
Strength: up to 120kn/m2
Heave Stopper Key points:
· BBA Approved.
· Easy to install.
· FSC Approved.
· Ideal for sites with restricted access.
· Suitable for Ground Beams and Slabs.
· Alternative to Dufaylite Clayboard.
· Meets the technical requirements of the NHBC.
· Alternative to Cordek Cellcore HX S Under Slab.
· Lowest possible forces transmitted to the structure.
· Alternative to Cordek Cellcore HX B Under Beam.
· The slimmest method of void creation means less excavation.
· Environmentally friendly, core facings manufactured from 100% recycled materials.
· A perfect solution for contaminated land and brownfield sites.
Heave Stopper Storage:
The boards must be kept dry, stored off the ground and on the delivery pallets to prevent any moisture ingress whilst in storage.
Stacked pallets must not exceed 2 high.
The protective cover must not be removed until ready for use.
160mm Heave Stopper Installation:
Ensure that the area is free of surface water.
Heave Stopper must not be placed in waterlogged ground.
Lay a sand, shingle or concrete blinding to provide a level bed for the boards to rest on with no pressure points to the underside.
Lay minimum 125mu (500 gauge) polythene the full width of the excavation and tape all joints.
Pay attention to detailing around pile penetrations and corners to ensure a watertight seal.
Good practice requires that enough polythene is laid to fold over the Heave Stopper boards to lap with the top layer of polythene.
Position Heave Stopper boards.
Fold over the polythene from the bottom layer to the top face of the Heave Stopper boards and tape all joints.
Make provision to introduce water into the Heave Stopper boards by way of the Void Pipe.
A Void Pipe is required every 25m2 or for every isolated area of Heave Stopper.
Tie the Void Pipe to adjacent reinforcement to hold upright during concrete pour.
Pour concrete and allow enough time to elapse for the concrete to become self supporting.
Introduce water into the Heave Stopper boards by inserting a hose pipe into the Void Pipe.
Flood with enough water to ensure total saturation of the Heave Stopper.
Once the saturation process is complete, strike through the bottom facing and polythene to allow the water to drain.
Pipe sections can now be sealed off with cement or sealant.
*Further information may be found in our Downloads section.
Fairly easy access to all PDF files.
Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet
For more information:
|Board covarage||2.88 m2|
|Material||Environmentally friendly honeycomb|
|Profile||Residential & Commercial Grade|
|Grade||Maximum strength grade of 120kn/m2|
|Applications||Under Slab and Beams ǀ Foundations ǀ Ground Heave|
|BBA Certified||Yes (no. 12/4963)|
|Maximum depth of concrete||up to 1000mm thick (wet concrete)|
|Features||Alternative to Dufaylite Clayboard & Cordek Cellcore|
|Manufacturer||Whiterock Construction Products®|
We deliver insulation materials to Mainland UK only. Deliveries to Highlands, Northern Ireland, Isle of Wight etc.. might be possible at additional cost.
We offer free delivery on most of the orders above £300 (excluding VAT) (except special products - shipping cost via courier - products marked ''Request A Quote'')
Delivery of some insulation materials might be extended due to the current situation (Covid-19, stock shortages, allocations).
If you need materials quickly please contact us - we will do our best to help you source materials needed.
We do not deliver on weekends and bank holidays. Sometimes we can deliver on Saturdays - please check with us before placing the order.
If you need any further information please contact us tel. 02081910776
We can help to calculate price per m2 or linear meter (one meter in length) cost, please just contact us via phone 02081910776, email or live chat. Alternatively, you can work it out yourself quickly and easily: to get cost per meter square please divide price shown in orange area by ''Required area (m2)'' Example price of £28.80 divided by board coverage 2.88m2 = cost of £10.00 per m2.
No matter whether you choose a local installer or a national company, there’s a few tips to help you find the right installer for your home insulation improvements, such as asking for recommendations and making sure that they’re part of a certification scheme. This makes sure that they have the right skills and standards of workmanship to carry out the installation, and you can be sure that they know exactly what they are doing.
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1. Thermal inspection picture in portfolio
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We are the stockist of construction materials and related products for both trade and DIY from most recognizable brands in the UK like Cordek, RCM, Promat, Rockwool, Isover, Celotex, Xtratherm, Ursa, Low-E, Cedral, Kingspan, Dufaylite, British Gypsum, K-rend, Ecotherm, Iko enertherm, Kay-Metzeler, Terrawool to allow you to complete your insulation job on time at competitive prices and the highest standards.