Every industry has critical equipment that can’t fail - and every failure can be costly. That’s where Hill Grwp enclosures come in. Here’s how we make a difference:

Hill Grwp recently supplied and installed several TopBox roof entry systems on a commercial building in Abergavenny, South Wales, providing safe and fully weatherproof entry points for essential building services. Although the roof is also fitted with solar panels, the purpose of the TopBox installations was to protect pipework and electrical services entering the building, ensuring that roof penetrations were properly sealed and structurally secure.

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.

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.

When a TopBox Roof Entry System is installed on a building, the enclosure itself is only part of the solution. The real performance comes together once all pipework, equipment and penetrations are fitted - and that’s when Hill Grwp applies one of the most important finishing steps: our engineered weatherproof pipe entry insulation seal.