The Grade II listed, five-star Mayfair hotel has been on its current site since the 1850s and the owners had been planning expansion work for some time.
The plan was for the plant room on the upper floors to be moved into the lower levels of the new basement. This would allow the redevelopment of the upper floors to create 40 rooms and include some new six-star suites.
The new basement layout would also include a spa, swimming pool, wine cellar, additional plant and back of house facilities.
The scheme to create 5,500 square metres of basement – excavating 25,000 cubic metres of material – in the centre of one of the busiest cities in the world – was made even more challenging as the hotel needed to stay open throughout the work.
The hotel still occupied the rest of the lower ground floor with a laundry, staff facilities and kitchens operating.
The work was carried out in extremely tight spaces, the five-storey reinforced concrete columns were built inside the shafts, up to the existing raft, to provide support to the building above. Only two rooms and a connecting corridor were allocated to service the works.
All plant and materials had to be transferred to the site via a single hoist over the access shaft so required meticulous planning and coordination.
In order to achieve all of this, contractors needed reliable, just-in-time delivery of specialist products.
With this in mind Brymec were called. With more than 40 years of experience, Brymec is one of the most agile and adept manufacturers and suppliers in the sector.
Due to their logistics capability and flexibility, Brymec was able to supply high-quality products within an extremely tight time frame and in a challenging big city location, while working with the contractors to offer technical advice throughout the installation programme.