PROMAFOUR® boards are cement bonded calcium silicate based insulation boards. These large-sized multi-purpose boards are easy to handle and offer a superior combination of enhanced technical properties for building strong, mechanically self-supporting constructions.

PROMAFOUR® boards form part of the PROMAFOUR® fireplace insulation system used to build a false chimney breast for a cassette/inset type fire place, or line existing chimney breast against concrete or timber frame. The PROMAFOUR® system is a safe reliable and robust, developed to resist continuous high temperatures of up to 1000°C.

PROMAFOUR® boards are also suitable for use behind a wood burning stove or heating appliance.

The PROMAFOUR® system is sold through designated specialist stove and fireplace stockists, distributors, and builders merchants.

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Further Information


  • Fireplaces and stoves


Provides both the installer and homeowner many benefits including:

  • Resists continuous high temperatures of up to 1000°C
  • Fire Reaction Class: A1 Non Combustible EN13501-1
  • Complies with Building Regulations Part J
  • Easy construction with standard tools
  • Minimal expansion and contraction during and after heating, reducing risk of cracking
  • Naturally smooth surface that can be easily decorated
  • Does not require plastering, negating need for wet trades
  • High thermal storage capacity helps heat distribution evenly within a room
  • HETAS Approved Product AUX036

Please note
All physical and mechanical values are averages based on standard production and tested according to internal procedures. The typical values are given for guidance. The figures can change dependent on the test methods used. If a particular value is of prime importance for a specification, please consult Promat Technical Department.