GRP Enclosures within the Construction Industry


The use of GRP Enclosures within the Construction Industry has been somewhat of a revelation. The fact that a Transformer Housing can now be Ordered, Delivered and installed within 2-3 weeks is a major step forward from the days when a traditional build was the only option available.

Time is always an issue on a construction site, deadlines have to be met in order to prevent delays

enclosure delivered to construction site

Enclosure being delivered to site

which usually have a costly affect on the project. The days of a traditional build saw a greater emphasis on the “human element” whereas Brick Layers would construct a Transformer Housing or Switchgear Enclosure aided by Carpenters, Roofers etc, this system was always reliant on satisfactory weather conditions and all members of the team turning up, it was also a relatively lengthy process and any hiccups only complicated an already complicated situation.

The introduction of GRP Enclosures has made a positive difference to the Industry, any requirements for GRP Housings are submitted to the likes of Adept GRP Ltd, a Quotation is provided followed by a detailed CAD Drawing, once the design/layout is approved production begins indoors, the production programme is unaffected by any inclement weather as is possible by traditional means. In approximately 3 weeks, at a pre determined time your GRP Enclosure will be delivered, offloaded and positioned by Hiab. You can then be confident that your Equipment is protected from the elements for years to come with very little maintenance anticipated.

Cost Effective and Low Maintenance


Glass reinforced plastic or GRP as it is commonly known is a material that is used today by many large well known companies and also smaller not so well known companies. Basically, what I mean is GRP is used in a vast number products ranging from aircrafts to our kitchen sink.

Because this material is so versatile it is also used on industrial estates all over the country, and it is used for GRP enclosures. Businesses everywhere are always searching for ways to save money but at the same time these businesses have to grow and expand to stay in the market.

GRP enclosures are used as business units on many industrial estates as an extension of the original unit. High rents charged per square foot that is constantly increasing puts pressure on businesses who are struggling to survive.
The solution for businesses that need more space for storage or as a working unit was to construct a GRP enclosure. The issues that where raised by the local planning offices have been satisfied as long as these GRP enclosures match the original unit that they are placed next to.

GRP enclosures can be ordered with several different finishes to match the original building. Slate lookalike roofs can adorn these GRP enclosures to make them look like they are a real extension of the brick building.
In fact in many ways the GRP enclosures are probably more efficient and cost effective than the brick building as once they are constructed they are very low maintenance.

I.P Rated Enclosures


Most GRP enclosures are manufactured to a degree of weather, water and intrusion protection and it is the client who determines the level necessary for the GRP enclosure. These levels (IP levels) are then included in the design and manufacturing according to the clients specifications.

The IP (or Ingress Protection) ratings are defined by the international standard EN 60529 (British BS EN 60529:1992). The IP level of your GRP enclosure is to determine how much of the sealing effectiveness is against moisture and the intrusion from foreign bodies, weather etc…

The IP level is much higher in a GRP enclosure when housing electrical equipment. There are numbers that follow all IP ratings and these have a specific meaning relating to the degree of sealing and protection effectiveness.

The IP rating for a GRP enclosure covers a range of waterproof elements from condensation to prolonged immersion in water under pressure. Enclosures that are constantly immersed in water would need to be totally waterproof and should therefore carry an IP rating of  IP68. Where enclosures are immersed temporarily at certain times they should carry a lesser rating of IP67.

For instance if your GRP enclosure was IPO rated this would signify that no special protection was included when the enclosure was designed and manufactured.

Then there is the weatherproof GRP enclosure, and the customer has to determine how much protection from the environment it will need in the IP rating chart.

GRP Adept can give all their clients advice on the levels of the IP ratings based on their expertise and experience accumulated over the years working with many industries requiring  GRP enclosures.

Enclosures and Cabinets

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The versatility of GRP is beyond question, its use is infinite, it can be manufactured in a lightweight or heavy weight form dependant on its intended purpose in a particular project.

The introduction of GRP in the manufacture of GRP Enclosures and GRP Cabinets has provided both versatility and longevity to the Purchaser, the customer can dictate the size, orientation, colour and engineering requirements of the Enclosure confident that it can be produced to their exact and specific requirements. Doors, be them General Access or Emergency Exits, can be positioned in any wall, ventilation can be forced (by means of Extraction Fans and Inlet vents) or Natural Cross Flow (by means of a series of Vents positioned at both High and Low level). Electrical items, such as Lighting, Heating, Sockets etc can be fitted, Wired, Tested and Certified prior to dispatch, thus eliminating the need for an additional service, and potential delays associated with such activities being undertaken by a Contractor on Site.

A typical GRP Enclosure Construction would weigh in the region of 20kg per M2 and would be as follows; Gel Coat/GRP/12mm Ply Core/50mm Encapsulated Vertical Battens/GRP. An increase in height may see the Core Material increase to 18mm and the Encapsulated Vertical Battens to 75mm in Depth. The typical external finish would be Semi Gloss which is available from any colour from the BS or RAL Range, alternative finishes include Simulated Brick (ideal when used to match up to an existing traditional Brick structure on Site), Simulated Wood Effect and a Textured Finish. The Textured finish is seen as a budget option, it does not require the availability of Semi Gloss moulds and is normally only manufactured as a standard finish by companies with limited facilities/expertise.

GRP enclosures

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GRP Enclosures are normally Delivered to site in Ready Built form, they are fitted with removable lifting plates and lifted into position by the Delivery vehicles Hiab (Subject to suitable Site Conditions/Access). The Enclosures have an internal/integral fixing Flange as standard to simplify the fixing down onto your Concrete base. Larger GRP Kiosks can be delivered in Panel Form and erected on Site by one of our fully Qualified GRP Site Installation Teams, the Panel From option is also invaluable where Site Access is inadequate for the Ready Built option. A typical 5000mm x 3000mm x 2.500mm High GRP Enclosure would normally be erected within a working day thus minimising any costly delays on Site. GRP Enclosures have a lifespan in excess of 20 years and require minimal maintenance during this period, they can also be relocated if necessary.

Alternatively, Adept GRP also offers a Standard Range (sixteen sizes in total) of smaller GRP Cabinets, also referred to as GRP Feeder Pillars, these are normally available from Stock and are the ideal solution as Electricity Meter Cabinets, Telemetry Housings etc etc.

If you have any Questions or Queries that relate to GRP Kiosks, GRP Enclosures or GRP Cabinets please use the “Contact Us” facility at , were always happy to help 🙂

Guide to GRP Enclosures

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Lets start with the basics. Glass Reinforced Plastic is made up of a composite of strong, tough and durable plastic resin and glass fibres that make its incredible strength. The resin starts off as a gooey texture a bit like treacle. If it dried on its own it will dry to a solid brittle and hard substance. This can be used to make a small casting or anything that won’t need too much strength. On its own, dry resin couldn’t take much strain and it would be a weak material.

When you mix this resin with the glass fibres it dries as material that is incredible in strength, weight and durability. Polymere is also a material that makes the GRP heat resistant too.

This is why Glass Reinforced Plastic is the perfect material for enclosures to house equipment or people. Its strength is against the elements is one to be reckoned with.

The most common resin used in Glass Reinforced Plastic are polyesters that are unsaturated dissolved in substance called styrene.

The final product of Glass Reinforced Plastic is unbreakable and it is a high quality material too that is light weight. There are so many pro’s to GRP.


Companies from across the globe are using GRP for Enclosures accross many projects and they have been for many years and still Glass Reinforced Plastic is still made in exactly the same way it was all those years ago.

Glass Reinforced Plastic has another added bonus over metal. GRP is totally non conductive. It will not conduct heat, it will not conduct electricity or sound. So in the safety line of things GRP is a safer bet if there is any risk of anybody getting electric shock.

If you take a look around at your every day life. You will be surprised at how much Glass Reinforced Plastic as actually being used. Toilet pipes, aeroplanes, cars, it is used in hospitals, cinemas, and even spaceships. Everywhere you look there will be different levels of Glass Reinforced Plastic,
you can view our range of GRP Enclosures.

GRP Enclosures any shape, any size


Glass Reinforced Plastic Enclosures, Cabinets and Kiosk are used to house anything you need them too. They can house people in temporary offices, equipment that needs protecting even if it is large or small.

One of the most common sites you will see a GRP kiosks security shacks. If a guard need to be outside at night or in bad weather, they can keep an eye a building in a warmer and protected from bad weather. The kiosk can be placed anywhere around a building it needs to. This gives the security guards more control over doing their job properly.

A Glass Reinforced Plastic enclosure will provide storage in any small or large area in any small or large area. They are able to have extensions from a small kiosk to larger buildings. The great part about the material that Glass Reinforced plastic is made out of is that it is so versatile; your kiosk can be made into any shape you want.

Because your enclosure will have a load bearing floor or base, you can store whatever you need and it doesn’t matter how heavy (or light) it is. The floor will be able to take its weight. Even the heaviest machinery can be placed on this load bearing floor without you worrying about how its going to take it.

You can have piece of mind that whatever you are keeping in there, will be safe from anybody trying to get in and steal or cause damage.

When you first order a Glass Reinforced Plastic, the design will start from the very beginning with your specifications that includes everything you need, exactly where you want the doors and windows placed. How you want the windows to open.

A Glass Reinforced Plastic is the answer to any outside waiting area or extra office room or even a coffee room for your employees to have a break.

It will be hard for you to find a more functional building that you can design. There is very little maintenance needed once it is put up and people are using it.

If you need water or electricity installed then that is no problem and very easy to install inside.

While you are having the GRP kiosk designed, you can still customise it to exactly your needs. How every many plug sockets you need, you can have. Even phone and Internet sockets can be fitted too.

So every one that uses it will be comfortable and the machinery safe.

Unbeatable protection and durability


Many industrial and commercial industries such as the electricity sector or the gas sector, any industry where sensitive and valuable equipment is outside and needs protection from the weather and people damage. The protection needs to be durable and very safe for its job. Glass Reinforced Plastic is a well tested material. It is used by a whole load of utility companies for housing pipes, wires tubes and anything else you can think of that would need protecting.

Glass Reinforced Plastic is made up of a total of plastic reinforced by fine glass fibres. You may well know it as fibreglass. It is a very strong material that can withstand tension and compression but you will find is extremely lightweight. Because of what it is made out of it is weather proof to all extremity’s so that makes it ideal to be used outdoors.

This Glass Reinforced Plastic is very mouldable so it can be made into a variety of structures including GRP cabinetsGRP Enclosures, and covers. Specific applications include companies that are in the industry of gas, water and electricity. Any industry that needs any equipment or pipes or anything protecting will turn to Glass Reinforced Plastic to use.

There are other examples of where Glass Reinforced Plastic is used to cover and conceal special equipment and electrical equipment. It is also used in the travel industry in the railway sector too. This material is a widely used material across the world. From Theme parks through to homes and things in the home. It is everywhere.

GRP is a very adaptable material and can be moulded into any shape or pattern you need it to be. So it can be made to fit around anything it needs to be. It can be produced in any colour that you want it to be. If you want a wood effect or a brick effect then you can. Or stick to whatever colour you like. It is great to use outdoors because, it doesn’t scratch, it isn’t affected by UV lights either. Glass Reinforced Plastic will go on for years because it is classed as a long-term industrial so expect it to last around 30 years.

great properties and benefits of GRP.


Since Glass Reinforced plastic has been discovered, it has opened up many doors and found lots of uses.

Glass Reinforced Plastic is also well known as fibreglass, is a composite material that consists of tiny strands of glass that is with the resin. Which as a result in the two being mixed together makes it such a strong material to work with. If the material has to be made stronger then it has to be mixed in with a substance called Kevlan or Carbon Fibre.

If both of these fibres are woven into a cloth, with the fibres running in different directions. These cloths will normally be found working on things such as high end products such as formula one cars.

Glass Reinforced Plastic is widely used around the world, because it has very little constraints or design limitations. This modern day material can be moulded literally into anything that its needed to be. Whatever it is moulded into, it will be light weight and very strong to work with. Also with very little maintenance needed once you have it fitted.

When you have a substance like this made for a specific usage, it can also have specific requirements made into it too. For example, if you need it be fire retardant or chemical resistant or and it can be made to be resilient against any extremity’s of the weather and the environment. Glass Reinforced Plastic has a great potential for any body in the design or building world, because you can push the design boundaries as far as you like with Glass Reinforced Plastic.

A few examples of what Glass Reinforced Plastic is used for.

Building features, Water slides, Roller coasters, ship parts, Enclosures, life rafters. Pontoons, Cars, Spoilers on cars…

The list is pretty much endless.

You will never realise how many things around are made of Glass Reinforced Plastic. Everywhere you will look will be something made of Glass Reinforced Plastic.

GRP Providers and manufacturers


Glass Reinforced Plastic manufacturers are very busy people and have been for quite sometime. It is used for more than just industrial usage. It is used in the leisure industry, commercial industry every where you look you will see Glass Reinforced Plastic.

For its weight it is extremely strong. It can be used for the body of a sports car or a carriage of a roller coaster ride. It is so easy to mould it can be used for just about anything it needs to be.

Glass Reinforced Plastic manufactures have been responsible for a lot of the expansion of GRP and a good deal of designing has gone along with it too. The properties of the material haven’t changed one little bit since it originally had been started to be used in the 1950s. It is simply how the material can be used has grown over the last 60 odd years.

The company that first discovered GRP was an English manufacture. They discovered that GRP could be moulded and shaped. They have come so far with this material that it can now be used for hazardous chemicals. It has also been part of developing moulds for sports cars and train carriages. A company can have one individual mould made for it, they can have one made form scratch for them.

So many companies have benefited from GRP and its actions. If you look back 60 years ago to what was used to build trains and pipes. You will find that not one bit of GRP was in place. It would have been steel but now GRP has taken its place, this why GRP is our choice of material for our enclosures.

Nowadays Glass Reinforced Plastic is used in everything. Everyday you will pass or use something that I made out of GRP. Traffic cones are made of Glass Reinforced Plastic. A pipe that water runs through is made of Glass Reinforced Plastic. It is everywhere around us.