For this project, Hill Grwp Ltd designed the GRP enclosure as two separate but coordinated sections. This allowed the pump room to retain the required overall dimensions while providing a more practical delivery and installation method.

TopBox Compact provided a cost-effective, low-profile and weatherproof solution for ventilation ductwork passing through the roof on this Swindon project, avoiding the need for a larger full-height roof enclosure.

A bespoke GRP equipment enclosure manufactured around a grease trap installation, with steel double doors, ventilation and pre-planned service entry points before delivery.

Another bespoke GRP sprinkler pump room has left the Hill Grwp Ltd factory in Swansea, this time heading across the water for installation in Northern Ireland.

Hill Grwp Ltd designs and manufactures TopBox Roof Entry Systems around each project’s requirements. Units can be configured to suit different service layouts, roof details, access needs, finishes and site installation requirements.

A GRP sprinkler kiosk does not finish when the building is positioned on site. One of the most important stages happens after the sprinkler pipework has been fitted: sealing around the pipe entries.

Hill Grwp Ltd has recently completed another split GRP sprinkler kiosk, manufactured with key project details already built into the enclosure. The unit includes steel double doors, integrated ventilation louvres, insulated roof construction and pre-formed pipe entry points to help support faster installation on site.

Condensation in electrical enclosures is one of the most common problems we see on industrial sites. It’s silent, often unnoticed until equipment fails, and it can cost thousands in repairs, downtime, and lost productivity. Here’s what causes it and how to prevent it.

Recent TopBox roof entry systems progressing through production, with this unit demonstrating the pipe entry configuration prior to installation.

From initial design through to on-site installation, Hill Grwp delivers GRP enclosures and GRP buildings for industrial and commercial applications across the UK. This project features a GRP enclosure with integrated steel staircase, installed by our team and engineered to provide safe, durable access to critical equipment in challenging environments.

A look inside one of our completed Pre-packaged Sprinkler Pump Room, delivered fully prepared and ready for commissioning.

Take a detailed look at our TopBox GRP roof entry system. This walkthrough showcases the internal design, robust construction, and weatherproof features that make it a reliable solution for industrial and commercial sites.

In modern industrial and commercial buildings, the point where mechanical and electrical services penetrate the roof is frequently overlooked during early design. Yet roof penetrations are one of the biggest contributors to leaks, thermal loss, and compliance failures across the UK construction sector. Improvised timber housings, site-cut openings, and hastily applied weatherproofing leave long-term performance to chance.

Choosing the right GRP (Glass Reinforced Plastic) enclosure is essential for protecting valuable equipment, maintaining site safety, and ensuring long-term reliability in demanding industrial environments. While many GRP manufacturers produce good-quality composite enclosures, very few are able to integrate fully engineered steel doors into their GRP buildings.

We’re excited to share our latest pre-packaged pump room, designed with both functionality and safety in mind. This particular unit features a specially attached access lid, complete with a high-quality gas strut to hold it securely open.

Across this multi-site project area, our client required a series of reliable and compliant rooftop entry system to safely house critical equipment. Every location was different - varying roof layouts, equipment footprints, and operational needs - which made TopBox the ideal solution. TopBox is our fully customisable GRP roof entry system, developed to give facilities teams the flexibility, safety, and durability they need… without disruption to ongoing operations.

From design → manufacture → logistics, our team handled every detail to ensure safe delivery and smooth installation on site. - Heavy-duty industrial equipment - Harsh outdoor environments - Compliance and long-term access needs

Our TopBox GRP roof entry system now installed at a UK Police firing range, providing secure, weatherproof access while maintaining a clean and low-profile finish.

At Hill Grwp, we design and deliver fully integrated electrical layouts, tailored to your exact specifications. Inside each substation, you’ll find pre-installed switchgear, transformers, control panels, and protection systems, all factory-tested for smooth, fast commissioning.

In modern industrial and construction settings, materials must perform under pressure — offering strength, protection, and longevity. One material that consistently meets these standards is GRP (Glass Reinforced Plastic). At Hill Grwp, we design, and manufacture precision-built GRP enclosures and modular buildings engineered to protect essential equipment across the UK’s infrastructure, utilities, and energy sectors.