Type Permanent formwork
Material GRP
Shapes accommodated Angled
Arched
Curved
Features Interlocking
Lightweight
Reinforced
Thermal insulating
 
 

Corrugated and flat GRC (glassfibre reinforced concrete) permanent formwork has been extensively used for over 20 years. GRC formwork products can be designed to suit all supporting beam design.

The design and final proportions of GRC permanent formwork takes into account factors such as the detail of the permanent works, the imposing loads from those permanent works and from construction operations, plus self-weight and other environmental factors.

Once this criteria has been decided, the formwork panels can be designed to accommodate any span width up to 1200mm - or wider by incorporating deeper corrugations - and in thickness capable of carrying varying depths of concrete to meet DOT requirements.

GRC formwork combines the well-established compressive properties of cement-based mortars with the valuable flexural and tensile properties contributed by the glass fibre.

Benefits of GRC

  • Dense and crack resistant.
  • Non-combustible with excellent resistance to fire and surface spread of flame.
  • Low water, water vapour, and air permeability - contributing to low carbonation rates and resistance to both sulphate and chloride attack.
  • Abrasion resistant.
  • Free from rot, corrosion and UV degradation.
  • Lightweight and easy to handle on, yet heavy enough to be stable.
  • Low maintenance.
The extent of the success of GRC permanent formwork and its practical application can be illustrated by the fact that more than 45 000 square metres were used on various bridge and tunnel contracts during the construction of the M25 alone. Many hundreds of thousands of square metres have been used worldwide.


Corrugated and flat GRC (glassfibre reinforced concrete) permanent formwork has been extensively used for over 20 years. GRC formwork products can be designed to suit all supporting beam design.

The design and final proportions of GRC permanent formwork takes into account factors such as the detail of the permanent works, the imposing loads from those permanent works and from construction operations, plus self-weight and other environmental factors.

Once this criteria has been decided, the formwork panels can be designed to accommodate any span width up to 1200mm - or wider by incorporating deeper corrugations - and in thickness capable of carrying varying depths of concrete to meet DOT requirements.

GRC formwork combines the well-established compressive properties of cement-based mortars with the valuable flexural and tensile properties contributed by the glass fibre.

Benefits of GRC

  • Dense and crack resistant.
  • Non-combustible with excellent resistance to fire and surface spread of flame.
  • Low water, water vapour, and air permeability - contributing to low carbonation rates and resistance to both sulphate and chloride attack.
  • Abrasion resistant.
  • Free from rot, corrosion and UV degradation.
  • Lightweight and easy to handle on, yet heavy enough to be stable.
  • Low maintenance.
The extent of the success of GRC permanent formwork and its practical application can be illustrated by the fact that more than 45 000 square metres were used on various bridge and tunnel contracts during the construction of the M25 alone. Many hundreds of thousands of square metres have been used worldwide.


Concrete formwork - products from other companies

Concrete formwork - all companies