Glass reinforced plastics (GRP) are a composite material combining plastic with glass fibres. The different properties of glass and plastic produce a more robust, reinforced material suited for many more uses. They are common in the construction industry and can be found across the commercial and residential sectors. Lionweld Kennedy have decades of experience in providing engineered composite solutions to a wide range of industries and applications, including to the rail sector. In fact, Lionweld Kennedy’s GRP products were installed as part of the recently completed SAS13 bridge replacement project – pictured above.

Here is a guide to why it is such a popular and versatile choice:

The Properties Of GRP

Composites such as GRP achieve combinations of properties not readily available from other materials. They enable us to add resistant properties to materials, increase their strength, and much more. A combination of plastic with glass fibres, for example, creates a lightweight, non-conductive, fire-resistant and corrosion-resistant material. That is a lot of desirable properties built into one material. 

GRP Is lightweight

GRP is lightweight whilst being as strong or stronger than other materials used in main load-bearing structures. Although steel grated flooring is strong and heard-wearing, GRP grated flooring is just as effective whilst more lightweight and cost-effective. 

GRP is waterproof

GRP is waterproof, which further increases its safety benefits. Among its many other uses, GRP offers excellent slip-resistance, with our GRP panels coming with a gritted top surface, making it the ideal option for use in the marine sector. GRP handrails, ladders and stairs are all also commonly found across many industries. 

GRP is non-conductive

Non-conductive structures are essential to health and safety on building and construction sites. This has made fibreglass popular, especially in the rail sector, both underground and overground, and other areas with increased electrical risks.

GRP is corrosive resistant

When it comes to outdoor use, GRP is one of the most popular materials for a variety of industries. This is because it is corrosion resistant, allowing it to withstand weather and climates of all types and severities.

Where is GRP Used?

GRP is present across many industries. It is used as a material in manufacturing for everything from the automotive to the aerospace industries. It is also common in the construction industry as its properties make it ideal for meeting high safety standards and requirements. Fibreglass access solutions such as GRP handrails and ladders are used in many sectors including:


Below we have collated the most common questions about glass reinforced plastics. Browse through them to find answers to your questions, or read them all for a fuller and more comprehensive look at GRP and its many uses. 

What is GRP made from?

GRP is made from plastic and glass fibres. The glass fibres may be arranged randomly, flattened into a sheet or woven into glass cloth. 

What is the difference between GRP and fibreglass?

GRP and fibreglass are the same thing: “Glass reinforced plastics”, “GRP”, “fibreglass”, and “glass fibre” are interchangeable terms.

Why You Should Use GRP Products

GRP is an incredibly versatile material with many advantages over alternatives. It’s a cost-effective alternative to many materials due to its long lifespan. And the savings add up further as it is lightweight and therefore easier and cheaper to move and install. Its resistant to corrosion and easy maintenance makes it an excellent solution for outdoor applications. Plus, you can get all of this without compromising on strength. In fact, many GRP products are stronger than other materials. 

GRP Access Products

GRP is perfect for strong, lightweight and non-conductive flooring and access solutions. This is why at Lionweld Kennedy, we proudly manufacture and supply high-quality GRP flooring, handrails and ladders, as well as other GRP structures. Lionweld Kennedy GRP access products are used in the rail, power, water, construction, offshore, and renewable energy sectors. Explore our product range or read our case studies to see how we are helping create safer work environments using GRP products. 


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