Frequently asked questions.

  • How heavy is GRC?
    Pennine Stone GRC is typically 85kg/m2.

  • How heavy is Precast Concrete?
    Precast concrete is typically 235kg/m2

  • What are the benefits of using GRC compared to Precast Concrete?
    Because GRC is substantially lighter than precast, this in turn saves money on the infrastructure & foundations.  SFS can be used to restrain the GRC thus providing further cost savings. The support and restraint brackets are less robust than those required for precast. The GRC cladding can be removed from the critical path in most cases.

  • How Strong is GRC?
    GRC typically has a 15mm skin, hollow ribs created around the perimeter of the panel provides structural integrity to the panels, this provides superior compressive strength over precast concrete generally 50 – 80 mpa.

  • Is GRC more expensive than Precast?
    We believe that on large panel projects It works out cheaper when considering installation costs also.

  • Does GRC have any restrictions?
    The only restriction is your imagination. There is virtually no limit to shape which can be created in a variety of profiled/textural or smooth finishes.

  • Crack Resistant
    GRC is crack resistant if it is installed in line with recommended practices eg.. the unit must be allowed to breath therefore no resin is used in the installation process.

  • Summary
    GRC is easy to mould
    GRC is fast to install
    GRC is durable
    GRC has a high compressive and tensile strength
    GRC is environmentally friendly
    GRC is easy to handle and transport
    GRC support systems can be adapted to meet the demand of unitised off site construction
Glassfibre reinforced concrete


PreMix Glass Reinforced Concrete is usually poured into wooden or GRP moulds. The resulting product may be very detailed and intricate. Suitable for most applications.


Grade 18 Sprayed Glassfibre Reinforced Concrete has outstanding strength properties and is used for larger panels and high wind loadings.