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Concrete waterproofing in London Nightclub

A thin-film structural waterproofing system manufactured by Flexcrete Technologies Limited has been applied by contractor Structural Renovations at an exclusive London nightclub frequented by celebrities including Beyonce and Jay-Z.

Flexcrete’s waterproofing products have been applied at Mason House, a former Masonic Lodge in London’s Argyll Street which is now a members’ only nightclub and has been ornately refurbished to resemble a Masonic Temple. With origins dating back to 1737 and with listed status, the structure is built beneath street level amongst the vaults of The London Palladium.

Many of the original features of the building have been restored to their former glory and guests enter the venue through a candlelit crypt before reaching three brick arches. The club is owned by entrepreneurs Marc Merran, Eamonn Mulholland and Jean Philippe Kley who also own the well-known celebrity haunt Chinawhite.

Structural Renovations were appointed as main contractors to resolve a damp ingress issue within the administrative area of the club. The existing waterproof render was removed to expose the original brickwork beneath. Localised repairs were first carried out using Monomix, a high strength, non-shrink waterproof mortar which can be applied up to 80mm in a single application. As Monomix is a single component, pre-packaged material, it only requires the addition of clean water on-site and the finished mortar offers low permeability to water, even at 10 bar pressure.

The substrate was then levelled with Monolevel RM to render and profile the substrate and provide a fair-faced finish. Once cured, the entire surface was coated with two x 1mm coats of Cementitious Coating 851, a high performance, cementitious modified coating which provides exceptional protection against water ingress. Designed for structural waterproofing, it resists positive and negative pressure under 100m head of water in below ground structures. It forms a hard, highly alkaline coating which not only protects the substrate from the effects of aggressive acid gases, moisture and chlorides, but also has greatly enhanced chemical resistance.

851 is non-toxic when cured, and like all of Flexcrete’s products, it is water-based so there are no special concerns during application in enclosed locations. When completed, this high performance structural waterproofing system is simply decorated to match the surrounding finishes.

Flexcrete Technologies Limited is the UK’s leading independent manufacturer of technical mortars and high performance coatings. With origins dating back to 1983, the company manufactures a wide range of concrete repair mortars, fairing coats, waterproof cementitious coatings and decorative protective coatings. With its head office and manufacturing complex based in Leyland, North West England, Flexcrete products are available from stockholding distributors all around the UK. The company also has a global presence through international agents and distributors in 65 countries worldwide with export sales accounting for over 50% of its business.

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