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. 

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. 

What does it take to get a rooftop entry system ready for delivery? For our latest Hill Grwp TopBox project, the answer is precision engineering, careful planning, and teamwork at every stage. This custom-built TopBox roof entry enclosure has just left our facility and is heading to site, where it will provide a safe, reliable, and cost-effective solution for controlled roof entry. At Hill Grwp, we design and manufacture TopBox GRP enclosures to make roof entry safer, simpler

GRP (Glass Reinforced Plastic) enclosures are commonly used across utilities, energy, and industrial infrastructure projects. At Hill Grwp, we’ve delivered countless GRP housing solutions for applications like pump stations, electrical equipment, and metering.  Here are some insights we’ve gathered from working with GRP housings on a day-to-day basis