Industrial GRP Enclosures


Flexibility in Design is a key feature when considering the numerous benefits of GRP Enclosures. Adept GRP produce various Bespoke GRP Housings for DNO’s such as Western Power Distribution, the majority of our Industrial Enclosures for Western Power include an Electrical Kit out, some are fitted with Roller Shutter Doors to provide maximum access, the Doors can be Electrically or Chain operated, GRP Enclosures which have a Chain operated Door are supplied with a Single Personnel Door, normally 1000mm Wide by 2000mm High for convenience purposes.

A GRP Enclosure can be supplied with an open Base, allowing for Services to be introduced from the underside, an alternative is to request the GRP Kiosk is sat on a Pre-Fabricated painted Steel Base, this is ideal where the GRP is to utilised as a Switchgear Enclosure, the Steel Base would be fabricated with Lifting Points which would have been Tested & Certified prior to dispatch.

Bespoke GRP Kiosks aside, Adept also manufacture and supply an extensive range of Standard GRP Cabinets, these are usually available from Stock in Green (BS 14-C-39) or Grey (BS 10-A-05), Drawings can be accessed here many of our repeat customers use our Secure Online Store when Ordering Adept GRP Cabinets, we have over the years, streamlined the process to make it as user friendly as possible. We also understand the need for human interaction on occasions and always welcome telephone enquiries by telephone on 01269 843355 or by e-mail

Benefits of GRP

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GRP (Glass Reinforced Plastic) has numerous benefits that are hugely beneficial in the manufacture of GRP Enclosures.

The primary benefits would be its Lifespan, GRP Enclosures remain operational for well over 25 years, they don’t need any painting or staining, a little light lubricating Oil on the hinges and lock will ensure trouble free service for years to come.


Another such advantage would be the flexibility in Design

GRP Panels can be produced in specified sizes. We often encounter instances whereas a GRP Enclosure is required at roof top level, the Service Lift is very often too small so we resolve the issue by Manufacturing the Wall/Roof Panels to suit the service lift. We then offer a Service whereas an Adept GRP Site Crew will attend Site and erect the Enclosure in the requested location.


Adept GRP Enclosures (also referred to as GRP Kiosks) are Non Conductive and are finished internally with a Fire Retardant Resin.

They are manufactured with the end use in mind, the position of the Doors and any other features dictated by the Customer prior to the commencement of manufacture. Further details are available at



We also produce a range of GRP Electrical Enclosures, these come in set sizes but with 16 options on size you’re almost sure to find something close to what you want. If you’d like to browse our Standard Range of GRP Cabinets you can find Drawings and prices at

DNO GRP Enclosure or DNO GRP Cabinet


DNO GRP Enclosure or DNO GRP Cabinet

A GRP Electrical Enclosure should provide trouble free service for over 30 years. The product is normally manufactured in a Single Skin Construction, which despite being lightweight, is deceptively strong and extremely durable. An Outdoor Electrical Cabinet is normally used as a Electric Meter Housing or possible as a GRP Cover for a Distribution Board which can be fixed to the GRP Cabinets internal backboard.

Adept GRP also provides a variety of Industrial GRP Enclosures and GRP Kiosks to various DNO’s (Distribution Network Operators), Western Power Distribution purchase Adept GRP Enclosures on a regular basis, they also Purchase Explosion Relief Roofs and GRP Doors for Substations. A typical Western Power GRP Enclosure would be Green in colour and may include a built in GRP Metering Section in addition to the main GRP Enclosure.

If you need assistance with a DNO GRP Kiosk or Substation Enclosure just send us a message or ring 01269 843355, we provide a quick turnaround on Quotations and are always available even it’s just for advice or guidance.

GRP Enclosures Manufactured in the UK


Adept GRP – a popular choice for GRP Enclosures

Using the very best materials and with a proven Design Adept GRP have become a popular choice when sourcing a purpose built GRP Enclosures for a wide array of applications.

Be it a Transformer Housing, Switchgear Enclosure or Personnel Kiosk we have to knowledge, facilities and ability to manufacture a GRP Kiosk to suit the application. As chosen suppliers to various DNO Companies, both directly and indirectly, we can provide you with an unrivalled level of assistance and service that will see you through your Project from start to finish.

All of our GRP Enclosures are Manufactured in the UK

In addition to a personable service, you can also rest assured that the GRP Housings we supply you with will be manufactured in line with ISO 9001:2008 Standards by a Company who are audited on a regular basis. Whilst our Outdoor Enclosures can be manufactured to any size you require, we also offer a Standard Range of GRP Cabinets and Walk in GRP Enclosures, these are our Standard Products which we manufacture on a daily basis from our premises in Wales, a user friendly list of these products, along with PDF Drawings etc can be found on our Technical Specifications page.

Our Standard Range of GRP Cabinets and GRP Enclosures are normally available on a quick turnaround but they are very popular so please feel free to drop Dan an e-mail at to get an accurate update on our current Stock levels.

Prices, Drawings and Images of our Standard Range can be found at in our GRP Enclosures Online Shop


Adept GRP increase production levels


Adept GRP Ltd have recently taken on additional premises with a view to increasing production levels of our ever popular GRP Electrical Cabinets. The Outdoor Weatherproof Cabinets are part of our Standard GRP Enclosure Range, are in continual high demand.

The VR Roadside Range offer Small, Medium and Large walk in GRP Enclosures, all Adept GRP products come with an expected lifespan in excess of 25 years making our GRP Enclosures a very cost effective option when lifespan is considered against initial outlay.

We also produce tailor made, Bespoke GRP Enclosures for situations where a standard GRP Kiosk doesn’t quite meet requirements. Bespoke Enclosures can be small or large, we are normally provided with a brief on what’s required which we then, given our extensive experience, use to produce an Autocad Drawing which we provide for approval prior to commencing manufacture. Delivery of the smaller GRP Cabinets are normally by National Carrier whilst the Larger GRP Housings are delivered on a dedicated vehicle and offloaded/positioned by Hiab.

In addition to being Audited by an external Consultancy Company on a monthly basis, Adept GRP is also Audited on an Annual basis by SGS with a view to meeting IS0 9001:2008 Standards, a standard we gained and have continually met for a number of years.

If you’re looking for assistance with an upcoming Project which requires an Industrial GRP Product  we are the people to speak to, we offer a very personalised service supported by extensive experience within the GRP Industry. Just visit or call 01269 843355 and we’ll guide you through the entire process.

Rooftop GRP Enclosures


A large number of GRP Plant Rooms etc are required to be positioned on existing rooftops, possibly a number of storeys above ground level. Cranage on to roof level as a Ready Built GRP Enclosure is not always an option due to the Site layout or a number of other reasons. One option to overcome such a problem is to consider the possibility of a Service/Goods lift, assuming availability and providing it is of a reasonable size, we can manufacture GRP Enclosures in narrow, smaller panels which will allow them to be transported to roof level with relative ease. The multiple Panels can then be transported across the roof to where they’re to be sited and erected by one of our experienced Site Crews.

In instances where conditions allow the GRP Enclosure to be craned up as a Ready Built, one piece component we would fit Certified Lifting Plates to the Enclosure prior to dispatch, the Slinger/Banksman can then hook the chains up to the lifting plates and commence the lift to the rooftop.

Adept GRP Enclosures are supplied with Risk Assessments/Method Statements on request, we can also provide you with an estimated weight for the GRP Enclosure so as to avoid any potential delays when executing the lift.

Feel free to Contact Us for more information.


The picture below shows a small vented BOS Containment Enclosure on a rooftop location in London.


GRP vs Steel in Industry


The great Debate over Steel Electrical Feeder Pillars against GRP Electrical Feeder Pillars continues, similar in style and appearance the option of either has been available to Industry for a number of years.

The benefits of Steel Electrical Enclosures

Steel Electrical Enclosures continue to be very popular, they are available in a number of Standard Sizes and are normally available at short notice, smaller units would have a single door normally secured with Triangular Locks, a Ply Backboard to accept Electrical Equipment and the option of a “Root” which can be set in concrete, ensuring a stable base fixing. Adept Steel Cabinets are manufactured from 2mm Zintec Steel Sheet and finished in Green as Standard. The negatives, when compared with a similar Electrical Enclosure manufactured from GRP is the fact that Steel is a conductor of Electricity and its limited lifespan of 8-10 years prior to it showing signs of corrosion.

The benefits of GRP Electrical Enclosures

GRP Electrical Enclosures appear to have the edge when all things are considered. They are also available in a range of Standard Sizes and again, normally available at short notice. Smaller units would come with a Single Lockable Door whilst the larger units would be fitted with Double Doors, they have no central pillar, so full access is provided when both doors are opened. The fact that GRP is maintenance free and has a life expectancy beyond 30 years sees the Doors being hung on Stainless Steel Hinges, secured by Stainless Steel Fixings. GRP Cabinets are designed to provide many decades of trouble free service, they can be manufactured in any Colour from the BS or RAL Range, they can be closed or open based (allowing cables to be fed into the Cabinet from the underside) and accept a range of optional extras such as Viewing Panes in the Doors, Enhanced Locking Systems, Vents but to name a few. GRP is non-conductive and has a Safety edge over Steel Cabinets in that sense.


To summarise, the general trend sees Industry switching from Steel Cabinets to GRP Cabinets, this primarily based on two factors mentioned above, GRP has a far superior lifespan and is a non-conductive material, two very important factors when looking to house Electrical Equipment safely with longevity in mind.

Buy Electrical Enclosures Online

Here at Adept GRP we manufacture and supply both Steel Electrical Enclosures and GRP Electrical Enclosures so contact us now or take a look at our online shop!

Range of GRP Electrical Cabinets

View our range of Electrical Enclosures in our Online Shop

Buy GRP Electrical Enclosures Online


An Adept GRP Electrical Enclosure is the ideal solution when looking to protect Electrical Equipment from the elements. Our Standard Range GRP Cabinets can be viewed online where you can also download Technical Drawings and make secure purchases using our shop facility, which allows you to buy GRP electrical enclosures online. Our Electrical Cabinets come in a variety of sizes and colours, they would have lockable Single or Double Doors (dependant on the size of the Enclosure), Stainless Steel Hinges with tamperproof fixings, a Backboard on the internal face of the rear wall and are normally delivered by National Carrier.

Instances will occur whereas a specific size GRP Enclosure is required (eg. The Concrete Base has already been cast or there are restrictions on site) and products in the Standard Range don’t quite meet the required size, this isn’t a problem as we are able to Manufacture a Bespoke Electrical Enclosures to the sizes required, just Contact Us with your requirements and we’ll provide you with a quotation by return. You can also specify any additional extras you may need, these may include Cable Entry Points, Vents to provide natural cross flow ventilation, Viewing Panes etc. etc.

Our current, worst scenario, lead time (assuming we don’t have the size you require in Stock) is approximately 7-10 days from receipt of Order, however, we understand the necessity of getting an Electrical Enclosure to Site quickly and will assist with any urgent requests as best we can. Our Stock, “off the shelf” GRP Cabinets are Manufactured in Green (BS 14-C-39) and Grey (BS 10-A-05) as these two colours normally meet standard requirements, Green in the Countryside, Grey in an Urban area seems to be the common ongoing trend.

Our Electrical Enclosures are IP55 as standard but this can be improved on by incorporating a membrane floor into the build and adding some Lever Handles to the first opening Door. Any water/dust ingress tests are carried out in house and not verified by any external body. Adept GRP Ltd operate to a Verified Quality System which is Audited by an External Body, this ensures that you’re in good hands from when you originally Contact Us through to the point where your GRP Enclosure is delivered.

Outdoor GRP Housings


When GRP is mentioned for outdoor grp housings, the acronym used is in reference to Glass Reinforced Plastic. GRP Products are used as a solution to ensure what is inside is secure and kept out of view. The size and scope of products can vary, from GRP Glass Reinforced Cabinets to Housing. Glass Reinforced Plastic (GRP) is an efficient, cost effective and durable way of protecting equipment such as water, telecommunications and industrial equipment.

The advantage of using GRP Housing is that its size and shape can be tailored to a client’s requirements, while the material used keeps the housing low in cost and can provide an attractive, durable building which looks appropriate to the surrounding environment.
View Our Range

GRP Housings are widespread commercial and industrial used, and can be found in places where a company or person requires an enclosed environment to house devices such as a control panel, gas equipment or security features which should not be accessible to the general public. This means GRP Products should be flexible enough to be used in a variety of landscapes, yet secure and long-wearing enough to protect what is inside from the elements and from any outside interference.

GRP Products from Adept GRP


This company also provides products like steel pillars or gates for the safety of your house. There are also other GRP products which are designed to assure your house’s security. For example, Adept GRP manufactures security lodges and ticket booths, which can be bought by big or small companies and even high schools that need this kind of constructions inside their campus. People should know that all GRP products can be specially designed and custom made for the clients who wish their products to be painted in a certain color.

They can also ask the company to build the kiosks or the cabinets with special features or to apply them after the construction is bring to the client’s house. GRP products are the best choice when it comes to storing materials, because you can be sure they have a long durability and provide safety for your goods.