Jablite is the UK's largest producer of EPS products for insulation and civil engineering applications

Hardcore Replacement


Jablite Hardcore Replacement is designed to replace the traditional broken brick hardcore for domestic extensions where access to the working area is restricted. Lightweight, clean blocks of Jablite Hardcore Replacement can be carried through a property without the disruption.

As well as acting as a void filler, it replaces the requirement for floor insulation providing a cost effective thermal performance for the lifetime of the dwelling.

Jablite Hardcore Replacement is easy to install and provides a smooth, level surface for a concrete slab.

Key Benefits
  • Enables the installation of hardcore and insulation at the same time
  • Flood proof
  • Resistant to moisture
  • Durable
  • Provides long lasting  dimensional stability
  • Excellent compressive strength
  • Available with Class E fire retardant additive
  • A+ rated in the BRE Green Guide to Specification

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Downloads & Specifications
Hardcore Replacement

BBA Certificates and other supporting documents can be found in Technical Resources

Technical Resources
Technical information
Product specification


Grade EPS 70 or 100 as defined in BS EN13163
Boards size 1800 x 1200mm
Standard thicknesses: 75, 100 and 150mm
Fire retardant: Available with Class E fire retardant additive if required


Mechanical Properties

Compressive strength at 1% nominal strain, tested to BS ISO 844 – rigid cellular plastics:

 70    grade 20kPa
 100 grade 45kPa


Hardcore Replacement is produced to the requirements of BS EN 13163 ‘Thermal insulation products for buildings – Factory made products of expanded polystyrene (EPS) – specification’.



+Is Jablite accredited to ISO 9001?
Yes, all Jablite sites are accredited to BS EN ISO 9001 Quality Management System.
+Does Jablite manufacture to ISO 14001?
Yes, Jablite is certified to the BS EN ISO 14001 Environmental Management System standard.
+Which thicknesses are available to order in Jablite Hardcore Replacement?
There are standard thicknesses which are 75, 100, 150, 200 and 300mm. However, other thicknesses may be available to order provided the maximum thickness is 300mm.