Heaveguard is a compressible low density Expanded Polystyrene product, used when foundations need to be protected against ground heave. As an integral part of the Cordek solution to ground heave, Heaveguard is used to protect against lateral heave, typically on the inside face of piled ground beams or deep trench fill foundations.
Features
- Reduces the lateral force transmitted to the structure
- BBA certified
- Meets the NHBC’s Technical Standards
- Wide range of sheets sizes and thicknesses to suit most applications
- Available as a pile collar to aid installation of Cordek’s Cellcore range
- Coloured green for easy identification on site
Applications
Heaveguard is used to protect against lateral heave, typically on the inside face of piled ground beams or deep trench fill foundations.
Suitability
The required thickness of Heaveguard is based upon the predicted lateral movement and recommended void guidance provided by the NHBC, as detailed in table one below. Note: Heaveguard and all other compressible polystyrenes do not compress significantly until loads exceed 20 kN/m2. A load of 40 kN/m2 is needed to produce 50% compression of the product. For this reason Heaveguard is not recommended for use under ground floor slabs, piled beams or pile caps.
Table One:
| Results of Soil Analysis | Shrinkage Potential | Predicted lateral movement NHBC recommended void | Heaveguard thickness for 'Equivalent Void' |
| 10-20 | Low | Zero | Zero |
| 20-40 | Medium | 25mm | 50mm |
| 40-60* | High* | 35mm | 75mm |
*When the analysis exceeds 60 or the shrinkage potential is greater than High, please consult the Cordek Technical Team on 01403 799600 for further information.
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Downloads
Data Sheets
| Product | Issue Date | Version | Size | Download |
|---|---|---|---|---|
| Heaveguard Data Sheet | 06/2017 | 1 | 1.7 MB |  |
Standard Details
| Product | Issue Date | Version | Size | Download |
|---|---|---|---|---|
| Cellcore HX B Very High Heave Standard Detail | 02/2021 | 1 | 158.2 KB | |
| Cellform HX Perimeter Ground Beam Standard Detail | 09/2017 | 1 | 37.2 KB | |
| Cellcore RC Slab and Perimeter Ground Beam Standard Detail | 08/2017 | 2 | 32.3 KB | |
| Heaveguard Pile Collar Standard Detail | 08/2017 | 2 | 117.0 KB | |
| Heaveguard Standard Deep Trench Fill Standard Detail | 01/2021 | 3 | 113.0 KB | |
MSDS Data Sheets
| Product | Issue Date | Version | Size | Download |
|---|---|---|---|---|
| Expanded Polystyrene MSDS | 06/2017 | 5 | 137.3 KB | |
Certification, Approval & Guidance
Brochures
| Product | Issue Date | Version | Size | Download |
|---|---|---|---|---|
| Construction Solutions | 01/2020 | 2 | 6.6 MB | |
| Ground Heave Solutions | 08/2017 | 1 | 1,014.7 KB | |
Installation Guides
| Product | Issue Date | Version | Size | Download |
|---|---|---|---|---|
| Heaveguard Installation Guide | 12/2018 | 1 | 363.2 KB | |
NBS Clauses
Our NBS Clauses are hosted on the external website - view NBS Clauses
BIM Library
Please select the BIM file in the format you require.
| Name | IFC Size | IFC Download | Revit Size | Revit Download |
|---|---|---|---|---|
| Sorry, no matching files | ||||
