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Shackerley’s SureClad® Modular Solution at Gresham St Paul’s

Shackerley’s SureClad® Engineered Stone ventilated cladding system has been used as a modular façade solution for a rooftop extension at prestige office development, Gresham St Paul’s, in central London.

The office building on Gresham Street has undergone a £50 million transformation, delivered by Mace and designed by leading architectural practice, Wilkinson Eyre. The project has maximised the building’s net internal area with an extensive remodelling programme, and added a three-storey extension at roof level.

The existing Portland stone façade has been retained and simplified with aluminium in-fill panels, and the architect needed to find a cladding material for the additional storeys that would reference the materiality of the existing building and answer planning requirements. The cladding system for the new storeys also had to work within the loading parameters of the original structure and offer a viable solution for the buildability challenges of working at height on a confined site in the City. Shackerley’s SureClad® Engineered Stone ventilated cladding system answered all of these requirements and was installed as pre-fabricated modules, following close collaboration between Shackerley, and Austrian façade specialist, GIG Fassaden.

The Wilkinson Eyre team considered a number of alternative cladding systems and materials to find a close aesthetic match for Portland stone that would meet planning requirements and weight restrictions for the project. Each potential solution was assessed against a series of criteria; look and feel, cost, fire safety, weathering, green credentials and mechanical suitability. The design team also considered a number of reference projects, including Axtell House, an office building in Soho where Shackerley’s SureClad® Engineered Stone system was used for the façades of additional storeys to co-ordinate with the Portland stone of the original building.

The Shackerley SureClad® Engineered Stone façade system was specified in a creamy beige Valpolicella colourway with white variegation and a sandblasted finish, complementing the existing Portland Stone façade.

The façades were installed as a modular system and, working closely with GIG Fassaden, Shackerley fabricated 400 modular façade units at one of the company’s ISO 9001-accredited factories in Lancashire. The custom-designed modular units utilised Shackerley’s large format 3050 x 1240mm x 30mm SureClad® panels with Shackerley’s tried and tested under-cut anchor and bolt fixing system, with each pre-fabricated façade section delivered to site as an installation-ready module that could be craned into position and secured in place.

Gresham St Paul’s adds to Shackerley’s portfolio of projects where the SureClad® system has provided a lightweight and robust solution for the façades of additional storeys, complementing the existing façade material.