picture of structural profiles


Tailored for strong and durable constructions

Definition: what is fibreglass or GRP material?

Fibre reinforced polymer is a plastic based composite material consisting of dry glass fibres and polyester. Normally referred to as fibreglass or GRP. In combination this result in a very strong and rigid material, perfect for construction purposes! Fibreglass is a cost-effective alternative to traditional building materials since it combines several advantages, e.g. it has strength as steel but weighs less, is corrosion-resistant, and has a good sustainability profile compared to other materials.

Key benefits of fibreglass profiles

Our composite profiles are produced using the manufacturing process pultrusion and consist of glass fibre threads and mats and a polymer matrix, typically of polyester resin. In our pultrusion process, this results in a corrosion-resistant, strong and light weight GRP material, perfect for load bearing constructions for industrial purposes and building. Learn more about pultrusion at Fiberline here

The many advantages include:

  • A lightweight material
  • A non-conductive material
  • Resistant to corrosion
  • High strength
  • Anti slip protection

Check out the 10 key benefits here

20-year warranty on all products

One of our distinguishing characteristics is our production method – pultrusion – where we carefully place the glass fibres in relation to the profile’s cross section, thus ensuring consistent and reproducible quality. At Fiberline Building Profiles, we have over 40 years’ experience in producing GRP-products, and we can therefore offer high, certified quality. And we are happy to stand by this claim by offering a 20-year warranty.

Part of an energy-efficient future

Our GRP-products are produced in an energy-optimised process, which means that they have a good environmental profile. If you want to learn more about our composite material or products’ environmental profile and their CO2- footprint, read more about the environment here


Quick guide: Do you need an easy overview of fibreglass?

Now we know that you have realised that fibreglass is extremely effective. Otherwise you would not have ended up on this page. In our quick guide, we have compiled everything you need to know to assess whether fibreglass is the right choice for your next project

10 advantages of fibreglass from Fiberline Building Profiles

CE marking

Our products have a number of international and highly sought-after certifications, among other, within the construction, offshore and railway sectors. This is your guarantee of consistently high quality every time you buy from us and use our products.

Low weight

Fiberline's GRP profiles are low in weight. This makes them easier to work with and means that great weight savings can be achieved on the finished structure.

Great strength

Fiberline Building Profiles give you the same great strength as steel, but at only a quarter of the density. It is also possible to make weight savings in comparison with aluminium, as the density is 30 % lower.


Our fibreglass profiles are resistant to aggressive chemicals, and liquids. This makes them ideal for wastewater treatment plants, swimming pools, cooling towers and construction, where there is a risk of corrosion.

Chemical resistance

Our fibreglass profiles are resistant to aggressive chemicals, and liquids. This makes them ideal for wastewater treatment plants, swimming pools, cooling towers and construction, where there is a risk of corrosion.

Electrical insulation

Fiberline's GRP profiles provide electrical insulation and minimise the complexity of earthing. This makes our profiles a future-proof choice where the costs of both installation and future inspections can be reduced considerably.

Easy to work with

GRP profiles are just as easy and fast to work with as timber. This means that solutions which incorporate our profiles can be installed easily on site or adjusted to fit existing components, such as piping systems, etc.

Thermally Insulating

Fiberline's fibreglass profiles have a significantly lower heat distribution gradient than steel and aluminium, enabling energy-efficient end products.

Minimal maintenance

Our GRP profiles have unrivalled durability and a long life, even in demanding conditions.


Fiberline's fibreglass profiles are produced using an energy-optimised process that takes the environment into consideration.

On the hunt for a sustainable alternative?

In general, fibreglass profiles have a good reputation for their environmental impact, and ours is certainly no exception!

Through an energy-efficient production process, better durability and fewer resources for maintenance and handling, we can be part of our customer’s green value chain.

Application areas of our GRP material

You will find a wide range of carefully selected sizes, compiled to meet our customer’s needs within building and industry. In addition, we are also happy to machine the profiles for you and to cut them to the desired dimensions. We could even assemble an entire bridge for you.

Our GRP building profiles, planks and gratings are most commonly used in:

Learn more about each of these industries here

Constructions and standard solutions with GRP materials

Want the easy solution? That is also well-tested and based on many years of experience? Then take a look at our standard solutions within bridges, platforms, access ways, stairs, handrails and cladding. Find all our standard solutions here

Only the imagination sets the limit! With a unique combination of mechanical properties, our profiles find wide use for a number of constructions, from swimming pool applications and boat bridges, to solar screens and temporary parking garages. Find inspiration from our many customer cases here

Need help from our GRP experts?

With more than 40 years of experience pultruding fibre reinforced polymers products for building and industry, we are pretty sure we can help you too. Our experienced team of technicians, engineers and advisors are at hand to talk about your next fibreglass project. Contact us today 


Frequently asked questions about composite repairs

How to properly repair fibreglass?

If your fibreglass profiles are scratched or cut, you do not necessarily need to worry about their lost mechanical properties. In case of minor damage that you would like to repair for aesthetic reasons, you can repair the profiles by first filling them with epoxy filler and then grinding and painting them. The filler should be appropriate for the circumstances and capable of adhering to plastic. Find out more about the repairs here.

How do I fix scratches in fibreglass?

If your fibreglass profiles are scratched and you would like to repair them for aesthetic reasons, you can repair these by first filling the damaged areas with epoxy filler and then grinding and painting them in order to obtain a neat finish. Read more about the repair requirements here. In case of major damage, you may need to replace the whole damaged area so that the strength of the construction is not impaired.

How do I fix ruptures in fibreglass?

In case of major damage where the fibres are clearly exposed, the profile’s properties may be affected. Such damage may simultaneously affect the complete construction. In these cases, we recommend replacing the profile. You can read more about small and large repairs to our fibreglass profiles here or contact us directly, if you are in any doubt as to whether the damage is extensive enough to require this.