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Comprising a cellular construction of expanded polystyrene combined with a robust polypropylene board and a layer of EPS insulation which has been designed and tested to tight tolerances to achieve the specified performance characteristics. It is available in a variety of depths and grades to suit the most commonly encountered combinations of soil heave potential and concrete depths.

Features and benefits:

  • Reduces the upward force transmitted to the structure.
  • Wide range of depths and grades to suit most applications.
  • Meets the NHBC Technical Standards.
  • Consistent performance supported by extensive testing.
  • Incorporates an integral layer of EPS insulation available in various thicknesses to meet thermal performance requirements.

General information



Cost effective and reduced carbon footprint, less upward force is transmitted to the structure, moulded for consistent performance and durability, reduced depth and therefore less excavation, suitable for most lightweight slabs, water resistant


Expanded polystyrene (EPS) honeycomb with insulation and a heavy-duty polypropylene top




2400 x 1200 x 130 mm

2400 x 1200 x 200 mm

2400 x 1200 x 265 mm

2400 x 1200 x 155 mm

2400 x 1200 x 225 mm

2400 x 1200 x 290 mm

2400 x 1200 x 180 mm

2400 x 1200 x 250 mm

2400 x 1200 x 315 mm

2400 x 1200 x 205 mm

2400 x 1200 x 275 mm

2400 x 1200 x 340 mm

2400 x 1200 x 230 mm

2400 x 1200 x 300 mm

2400 x 1200 x 365 mm

Uniclass 2015 Compressible board substructure formwork (Pr_25_71_29_16)
Specification data
Product Reference

Cellcore HX Plus


7 / 10

Safe load/ fail load (kN/m²), 220 mm maximum concrete depth.

9 / 13

Safe load/ fail load (kN/m²), 300 mm maximum concrete depth.

13 / 18

Safe load/ fail load (kN/m²), 460 mm maximum concrete depth.

18 / 24

Safe load/ fail load (kN/m²), 660 mm maximum concrete depth.

24 / 32

Safe load / fail load (kN/m²), 900 mm maximum concrete depth.

Thickness -
Section (plus thicknesses of EPS insulation)

90 mm

160 mm

225 mm


50 mm


75 mm

100 mm

125 mm

150 mm



Standard product features


2400 x 1200 mm.


Expanded polystyrene (EPS).

Product Options


Dependent on the total load that will be exerted onto the .panels.


- Panel Thickness:

Dependent on many factors, including soil analysis results, soil shrinkage category and predicted ground heave. Consult manufacturer's literature for more information.

- Insulation:

Additional insulation types/ thicknesses available upon request. Consult manufacturer for information.

Digital objects
PlatformCompatibleVersionCertified to
Revit 2016 5 2.0
IFC2X3 2 1.3
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