Case Study
Stabilised Gravel Grid Office Car Park

Project Ref NCS007
Category Gravel Stabilisation Grids
Product ID Nidagravel NG040
Technical Data Sheet

A large permeable, stabilised gravel grid car park installation for overflow visitor car parking at the new PortSwigger HQ at Booths Park in Knutsford, Cheshire. Constructed by GMI Construction PLC. Gravel car park stabilised with Nidagravel NG040 gravel stabilisation grids.

Project Overview
The construction of this hi-spec office building is set to become the new global headquarters for cybersecurity firm PortSwigger. It comprises 62,000 sq ft of floor space set across two stories complete with timber cladding and landscaped gardens that have been designed to complement and blend into the surrounding woodland area. Set in 220 acres of scenic Cheshire parkland, Booths Park offers high-quality workspaces for many high-growth businesses. In addition to the main parking area a large overflow parking area was created. The architects and contractors selected the Nidagravel NG040 gravel stabilisation system for the project which offered the best solution for a permeable, SuDS-compliant, and durable gravel surface for the project.

Project Information
Application: Car park
Product ID: Nidagravel NG040 Gravel Grids
Area: Approx 2300 SQM
Gravel: 14mm Angular Gravel
Contractors: GMI Construction PLC and sub-contractors
Architects: Calderpeel Architects and Planit I.E. Limited
Location: Knutsford, Cheshire

Installation Details
The layout of the fully permeable gravel car park surface created using Nidagravel NG040 gravel girds was carefully planned by the landscape architects to provide an attractive parking area. The scheme also included gabion walls, concrete edgings, native tree and hedge planting, ornamental planting and exterior lighting. Extensive groundworks were required for the external works and base construction of the car park. A reinforced concrete retaining wall faced with stone gabions was constructed to the rear of the building as the overflow car park sits on a sloping part of the site. Due to the large scale of the car park, the contractors were able to complete the gravel stabilisation grid installation in sections. This allowed for a section of grids to be installed and filled with gravel whilst final base preparation was being completed on other sections ensuring speedy and efficient installation of the system.

The Finished Results
The quality of this project speaks for itself. All aspects of this head office building and the external areas have been designed and implemented to the highest of standards by GMI Construction PLC and partners, using a palette of quality building and landscaping materials.

Quote from the Contractors
"The project team has done a remarkable job as, despite the challenges presented by the pandemic over the last 12 months, they have successfully delivered this fantastic development to an incredibly high standard."
Mark Banks, Divisional Managing Director
GMI Construction PLC

Why choose Nidagravel grids?
Nidagravel grids have been manufactured to the highest standards by SAS Nidaplast Honeycombs for over 35 years having originally developed the cellular gravel retention system. Nidagravel offers the best solution for a stable, 100% permeable, SuDS compliant, high-performance, and low-maintenance gravel surface for paths, driveways, and car parks. We are dedicated to providing the best possible solutions, technical support, and first-class service to our customers all over the UK.