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

Hardcore Replacement


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

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

Jabcore 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
  • BBA (British Board of Agrément) accredited, certificate 87/1796
  • 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
Downloads & Specifications
Hardcore Replacement

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

Technical Resources
Technical information
Product specification

Jablite Jabcore insulation is supplied:

Grade  EPS 70 or 100 as defined in BS EN13163
Boards size 2400 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:


Jabcore 70 20kPa
Jabcore 100 45kPa


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