Cellcore HX Plus

Cellcore HX Plus is designed for use beneath reinforced concrete floor slabs to protect against the potential effects of ground heave with the additional benefit of providing insulation. The product consists of a cellular construction of Expanded Polystyrene bonded to a Filcor insulation layer and protected by a thin polypropylene sheet. All product variations have been designed, moulded and tested to tight tolerances to achieve the specified performance characteristics.


  • Reduces the upward force transmitted to the structure from ground heave
  • Integrated Filcor insulation, based upon U-value requirements
  • Wide range of profiles and grades to suit most applications
  • BBA certified
  • Meets the NHBC’s Technical Standards
  • Moulded production for enhanced and consistent performance

The standard range of products are available in a variety of depths and grades to suit most commonly encountered combinations of soil heave potential, concrete depth and U-value requirements.


Cellcore HX Plus is designed for use beneath reinforced concrete floor slabs as an insulated heave protection product.


Please note to establish the complete product specification, firstly the Cellcore HX depth and grade need to be determined to protect against the ground heave potential and to support the construction loading and then the thickness of the Filcor insulation necessary to achieve the U value required needs to be calculated. 

For assistance in determining the complete product specification for Cellcore HX Plus, please contact the Cordek Technical Team on 01403 799600.


Data Sheets

Product Issue Date Version Size Download
Cellcore HX Data Sheet 10/2019 5 2.5 MB

MSDS Data Sheets

Product Issue Date Version Size Download
Expanded Polystyrene MSDS 06/2017 5 137.3 KB

Certification, Approval & Guidance


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
Cellcore Installation Guide 09/2019 2 798.4 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
Cellcore HX Plus 139.0 KB 980.0 KB

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Case Study

New Library University of Roehampton

Cordek were called upon to deliver a ground heave solution which would also provide the necessary level of ground floor insulation.

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For international enquiries please contact Peter Blanchard

Or contact Cordek Head Office