Meet Hill Grwp Ltd | The Manufacturer Behind Insulation & More
July 15, 2026Many of our customers know Insulation & More as a specialist supplier of insulation, cladding, valve jackets and associated installation products.
What may be less familiar is the wider manufacturing business behind the website.
Insulation & More is a trading name of Hill Grwp Ltd, a Swansea-based UK manufacturer specialising in bespoke GRP and steel enclosures for construction, fire protection, utilities, industrial facilities and infrastructure projects.
Although the two sides of the business provide different products and services, they work with many of the same contractors, engineers, facilities teams and project managers.
A Direct Route from Product Supply to UK Manufacturing Support
Understanding the connection between Insulation & More and Hill Grwp Ltd means customers have a direct route to a specialist manufacturing team when a project requires more than insulation products alone.
What does Hill Grwp Ltd manufacture?
Hill Grwp Ltd designs and manufactures project-specific enclosures and supporting structures for electrical, mechanical, fire protection and industrial equipment.Rather than offering a limited range of standard sizes, Hill Grwp Ltd designs each solution around the equipment, site conditions and technical requirements of the project.
- GRP and steel weatherproof enclosures
- Pre-packaged sprinkler pump rooms
- Switchgear substations
- Oil and gas metering housings
- TopBox roof entry systems
- Steel bases for enclosures and equipment
- External steel staircases and access platforms
- Enclosure repairs, alterations and refurbishment
This can include the enclosure dimensions, equipment layout, access requirements, ventilation, service openings, internal fit-out, steel base, delivery method and installation arrangements.
Bespoke GRP and steel enclosures
Hill Grwp Ltd’s GRP and steel enclosures provide secure, purpose-built environments for electrical, mechanical, utility and process equipment.
Projects can range from compact control-panel kiosks to large walk-in plant enclosures.
- Insulated or single-skin construction
- GRP, steel or combined construction
- Steel single or double doors
- Ventilation and temperature-control systems
- Internal lighting, sockets and electrical distribution
- Pre-formed pipe, duct and cable entries
- Removable roofs or access panels
- Hot-dip galvanised or painted steel bases
- External access platforms and staircases
- Bespoke colours and finishes
By coordinating these elements during the design and manufacturing stage, Hill Grwp Ltd can reduce the amount of modification and assembly required after the enclosure arrives on site.
Pre-packaged sprinkler pump rooms
Each sprinkler pump room is designed around the chosen sprinkler pump equipment, pipework arrangement, maintenance clearances, ventilation requirements and available site access.
Units can range from compact GRP sprinkler kiosks to large pump-room buildings delivered fully assembled or in sections for installation around equipment already positioned on site.
- A coordinated enclosure package
- Reduced on-site construction
- Fewer interfaces between different trades
- More predictable installation
- Factory-controlled build quality
- Service entries formed before delivery
- Options for integrated lighting and ventilation
- Solutions for restricted-access sites
Hill Grwp Ltd manufactures the enclosure and supporting systems rather than the sprinkler pump equipment itself. This allows sprinkler contractors to use their preferred pump supplier while receiving a purpose-built housing designed around the selected system.
TopBox roof entry systems
TopBox roof entry systems provide a controlled route for building services entering through commercial and industrial roofs.
Each TopBox is designed around the services it needs to accommodate. This can include ductwork, electrical containment, pipe entries, access panels and removable lids.
Bringing these elements together within one factory-built unit can help reduce the need for separate roof penetrations and improvised weatherproofing arrangements on site.
TopBox systems can be used on new-build and refurbishment projects, including commercial buildings, industrial facilities, data centres, healthcare buildings and infrastructure developments.
Switchgear and metering housings
Hill Grwp Ltd designs and manufactures bespoke GRP and steel switchgear substations and metering housings around the equipment specification.
- Natural or forced ventilation
- Internal lighting and electrical services
- Cable-entry arrangements
- Equipment access and maintenance clearances
- Insulated wall and roof construction
- Steel doors and security hardware
- Integrated steel bases
- External staircases and access platforms
The enclosure, base, access and internal requirements can be coordinated as part of one package, helping reduce interface problems between separately designed components.
Steel bases, staircases and access platforms
The enclosure is only one part of the installation. Bases, platforms and staircases can be designed as part of the same coordinated package.Hill Grwp Ltd can provide steel bases for GRP and steel enclosures, as well as external steel staircases and access platforms.
This is useful where the enclosure needs to sit over services, align with site levels, provide safe maintenance access or integrate with raised equipment.
Steel Bases
Steel bases can be designed around enclosure dimensions, service openings, lifting requirements and site support details.
View Steel BasesExternal Steel Staircases & Platforms
Bespoke access structures for raised equipment, roof plant, elevated enclosures and maintenance routes.
View Staircases & PlatformsSubmit a Project Enquiry
Send drawings, dimensions, equipment layouts and site requirements to the Hill Grwp Ltd team.
Request a QuoteWhat does this mean for Insulation & More customers?
Many Insulation & More customers work within mechanical services, insulation, fire protection, industrial maintenance and construction. These projects may also require weatherproof equipment housings, sprinkler pump rooms, substations, roof entry systems or steel access structures.
Being part of Hill Grwp Ltd means we can provide a direct introduction to the appropriate manufacturing team when one of these requirements arises.
Shared Contractor Understanding
The wider business understands site access restrictions, deadlines, trade coordination and technical specifications.
Different Services, Connected Support
Insulation & More supplies insulation products, while Hill Grwp Ltd manages bespoke enclosure enquiries.
Broader Technical Support
Customers can access a wider range of product and manufacturing knowledge through one established organisation.
UK manufacturing from Swansea
Hill Grwp Ltd manufactures from its facility in Swansea and supplies projects throughout the UK.
The company works with main contractors, M&E contractors, sprinkler and fire protection specialists, electrical contractors, utility providers, consultants and industrial project teams.
Hill Grwp Ltd is also a Made in Britain member, supporting its position as a UK manufacturer of bespoke GRP and steel products.
Every project begins with the customer’s requirements. The design team can review specifications, drawings, equipment layouts and site information before developing a solution suited to the intended application.
Related Hill Grwp Ltd services
Explore the main Hill Grwp Ltd manufacturing services connected to the article.
GRP Weatherproof Enclosures
Purpose-built GRP and steel housings for electrical, mechanical, utility and process equipment.
View ServiceSprinkler Pump Rooms
Factory-built pump room housings designed around sprinkler equipment and project requirements.
View ServiceSwitchgear & Metering Housings
Secure GRP and steel housings for electrical switchgear, metering and utility equipment.
View ServiceTopBox Roof Entry Systems
Controlled weatherproof roof entry units for ductwork, pipework and electrical services.
View ServiceSteel Bases
Steel bases for enclosures, equipment housings and packaged plant installations.
View ServiceSteel Staircases & Platforms
External access structures for raised equipment, rooftops and enclosure projects.
View ServiceDiscuss your next enclosure project
For insulation, cladding, valve jackets and associated installation products, customers can continue to browse and order through Insulation & More.
For bespoke GRP enclosures, sprinkler pump rooms, switchgear housings, TopBox roof entry systems, steel bases or external access structures, visit Hill Grwp Ltd to view the complete manufacturing range.
Share drawings, equipment layouts, dimensions and specifications.
Discuss GRP enclosures, steel bases, access platforms and packaged units.
The team can review requirements and advise on a suitable enclosure solution.
Hill Grwp Ltd Website: https://www.hill-grwp.co.uk/
Quote Submission: Submit your project enquiry
Phone: +44 (0) 1792 899177
Email: information@hill-group.co.uk
Frequently Asked Questions
Is Insulation & More part of Hill Grwp Ltd?
Yes. Insulation & More is a trading name of Hill Grwp Ltd.
What does Hill Grwp Ltd manufacture?
Hill Grwp Ltd manufactures bespoke GRP and steel enclosures, sprinkler pump rooms, switchgear and metering housings, TopBox roof entry systems, steel bases, staircases and access platforms.
Does Hill Grwp Ltd manufacture standard enclosures?
Hill Grwp Ltd focuses on project-specific solutions designed around the equipment, site conditions, access requirements and technical specification.
Does Hill Grwp Ltd supply sprinkler pump equipment?
Hill Grwp Ltd manufactures the enclosure and supporting systems rather than the sprinkler pump equipment itself. Sprinkler contractors can use their preferred pump supplier while receiving a purpose-built housing.
Who should contact Hill Grwp Ltd?
Main contractors, M&E contractors, sprinkler companies, electrical contractors, consultants, utility providers and industrial project teams can contact Hill Grwp Ltd for bespoke enclosure and access structure requirements.