Ventform Plus

Ventform Plus provides an excellent passive gas venting medium under suitably reinforced concrete ground floor slabs with the additional benefit of incorporating below-slab insulation. When used in combination with perimeter vents and a suitable gas membrane it creates a highly effective method of protecting structures against the ingress of harmful ground gases.


  • Highly effective venting medium suitable for ground gas affected sites as part of a gas protection system
  • Integrated Filcor insulation to suit U-value requirements.
  • Range of thicknesses and grades to suit most project requirements
  • Light, robust and easy to install 2400mm x 1200mm panels
  • Ventform panels are resistant to UV light, water and are flame retardant. They contain no CFC’s or HCFC’s


Ventform panels are designed for use under suitably reinforced concrete slabs to form an insulated, passive gas venting layer.


Please note to establish the complete product specification, the Ventform Plus panel type must be established, based upon the required ventilation clear void and maximum loading conditions. The panel thickness also needs to be calculated based on the U-value requirement to complete the specification.

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


Data Sheets

Product Issue Date Version Size Download
Ventform Plus Data Sheet 05/2024 1 353.7 KB

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
VOC & Ground Gas Protection 07/2019 4 4.0 MB

Installation Guides

Product Issue Date Version Size Download
Ventform Plus Installation Guide 05/2024 1 249.2 KB

NBS Clauses

Our NBS Clauses are hosted on the external website - view NBS Clauses

BIM Library

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For international enquiries please contact Peter Blanchard

For enquiries in the Manchester or Liverpool
areas please contact James Provan

Or contact Cordek Head Office