What Is GRP Security Fencing

Security fencing does more than mark a boundary. Around sensitive sites such as power stations, substations, utilities and airports, it must be strong, durable, safe and reliable. GRP security fencing provides all of these qualities. Here is how it is made, why it is effective, and where it is commonly used in the UK.

What Is GRP Security Fencing

GRP, or Glass Reinforced Plastic, is a composite material made from polymer resin and glass fibres. It combines strength with durability and offers properties that make it suitable for demanding environments.

Key features of this fencing include:

• High strength while remaining lightweight
• Non-conductive, making it safe around electrical installations
• Resistant to corrosion and chemicals
• Non-magnetic, ideal near sensitive equipment
• Transparent to radio, radar and microwave signals

These characteristics make GRP fencing an excellent choice where traditional metal fencing would rust, conduct electricity, or interfere with sensitive systems.

How GRP Security Fencing Is Made

There are two main methods for producing GRP fencing.

Pultrusion involves pulling continuous glass fibres through a resin bath. The material then passes through a heated die, which shapes and cures it into the required profile, such as posts, rails or channels. After curing, it is cut to length and ready for installation.

Moulding is used for more complex shapes or mesh panels. Dry glass fibres are placed into a mould and resin is applied. Once cured, the finished component is released from the mould, providing precise shapes with consistent strength.

An example of Jacksons GRP Security Mesh Fencing.  Thank you to them for allowing us to use the image

Where GRP Fencing Is Used

GRP fencing is widely used across the UK in sectors that require durability and safety.

Electrical Substations and Power Sites

Its non-conductive nature makes GRP fencing ideal for areas with live electricity, reducing the risk of accidental shocks.

Rail Infrastructure

GRP fencing is often used around trackside installations and signal boxes where magnetic interference must be avoided. Its lightweight design makes installation in hard-to-reach areas easier.

Airports and Airfields

Airports use GRP fencing because it does not interfere with radar or communications. Frangible fencing that can break safely on impact is often used at the end of runways.

Water Treatment Works and Chemical Plants

GRP resists corrosion, making it suitable for wet or chemical-rich environments without the need for painting or regular maintenance.

Telecommunications and Radar Sites

Because it does not interfere with electromagnetic signals, GRP is ideal around radar masts, telecoms towers and satellite installations.

Marine and Coastal Sites

GRP fencing withstands salt and moisture better than metal alternatives, making it suitable for harbours, ports and coastal protection areas.

Industrial and Utility Sites

From gas facilities to renewable energy plants, GRP fencing offers a secure perimeter that requires very little upkeep.

Benefits of GRP Fencing

GRP fencing combines strength with ease of use. It is lightweight, corrosion-resistant, non-conductive and non-magnetic. Many systems are fire-resistant and UV-stable, maintaining their appearance and performance for decades. The low-maintenance nature of GRP makes it a practical choice for almost any outdoor installation.

Technical Considerations in the UK

To perform well, GRP fencing should use resin suited to the environment, whether exposed to UV, salt or chemicals. It should meet fire safety standards, withstand expected wind and impact loads, and comply with security or utility regulations. GRP fencing often carries warranties of 20 to 30 years or more.

Examples of GRP Fencing in the UK

Several UK suppliers provide GRP fencing solutions, some example include:

• Engineered Composites produces modular palisade fencing that is weatherproof and easy to install.
• Jacksons Fencing offers non-conductive, non-magnetic fencing in a range of styles, including frangible options for airfields.
• PLURA manufactures POLYsade® GRP fencing, which is lightweight, corrosion-resistant and ideal for energy and transport sites.

Comparing GRP and Steel

GRP is non-conductive and safe near electricity, unlike steel. It will not rust or degrade in harsh conditions, so it requires far less maintenance. GRP is lighter, making it easier to install, and it does not interfere with sensitive equipment or radar systems at the same time steel is still the preferred material for security fencing withing standard applications.

Conclusion

GRP security fencing offers a modern alternative to metal fencing. It combines strength, longevity and safety with minimal maintenance. For UK sites such as substations, airports, industrial facilities and coastal locations, GRP fencing provides a reliable, cost-effective solution that performs well in the most challenging conditions.