GRP Enclosures · Made to order in Wales
The GRP enclosure your equipment deserves
For 40 years we have built weatherproof Glass Reinforced Plastic (GRP) cabinets, kiosks and enclosures that keep valuable outdoor equipment safe and dry. Every unit is made to order in our own workshop in Wales, built to last, and backed by one person who looks after your job from quote to delivery.
- 40 years' experience
- UVDB registered
- Made in Wales
- Supplied UK-wide
The problem
You need a housing you can rely on
Your equipment is expensive, and the British weather is not kind to it. You need a cabinet or enclosure that keeps water, dirt and interference out, does not rust or rot like steel, and is still doing its job in twenty years' time.
You also need a supplier who does what they say. If you have been let down on a late delivery before, or handed around a slow support desk, you know how much that costs you on site.
Made properly, by people who pick up the phone
We are a small, family-run manufacturer, and we like it that way. Every enclosure is built to order in our own workshop, so we control the quality from the first cut to the finished unit. Nothing is subcontracted and nothing is rushed out poorly finished.
When you order from us you deal with one person the whole way through. No ticket numbers, no jargon, no chasing. Just a straight answer on what you need, what it will cost and when it will arrive.
- Made in our own Welsh workshop
- Full control over every unit we build.
- Built to last
- GRP does not rust or rot, and needs virtually no maintenance.
- One point of contact
- The same person from quote to delivery.
- Made to order
- Standard sizes or built to your exact spec.
Our GRP range
Standard sizes ready to build, or a bespoke housing made exactly to your specs.
Single-door GRP cabinets
Compact, secure protection for smaller instrumentation and equipment.
Find out moreDouble-door GRP cabinets
Wide access for fitting out and maintaining larger equipment.
Find out moreWalk-in GRP enclosures
Durable, low-maintenance housings you can work inside.
Find out moreBespoke GRP housings
Built to your exact dimensions and requirements.
Find out more
Why buyers across the UK choose Celtic Composites
Our enclosures protect equipment on construction sites, pumping stations, renewable-energy projects and roadside installations up and down the country.
- 40 years
- Manufacturing GRP housings for British industry
- UVDB
- Registered supplier, recognised across utilities, water and energy
- 25+ years
- Life expectancy on our GRP kiosks, with virtually no maintenance
- UK-wide
- Supplied from our workshop on the edge of the Brecon Beacons
Simple and reliable, from first call to delivery
- 01
Tell us what you need
Send your sizes and quantity, or your drawings for a bespoke unit. Not sure? Give us a ring and we will help you spec it.
- 02
We build it to order
Your enclosure is made in our workshop to the quality we would want ourselves. We will give you an honest lead time and stick to it.
- 03
Delivered ready to install
Your finished unit arrives where you need it, ready to fit out and put to work.
It's also worth knowing…
We build to order, not off-the-shelf
That is how we keep the quality high. Tell us your deadline and we'll let youu know whether we can hit it.
No public price list
Every job is quoted to your sizes, quantity and spec, so you only pay for what you actually need.
New customers welcome
First orders are on proforma. Once we know each other, we can talk about an account.
Let's get your enclosure sorted
Contact our sales team today to find out how we can provide GRP solutions for your business.