18/12/2017
Sika supplied the long-term concrete repair and protection solution to facilitate a landmark listed building’s transformation into a luxury residential complex.
The Hoover Building in Perivale, west London remains one of the most stunning examples of Art Deco architecture in the UK. Built in the 1920s for the Hoover Company, the original building was Grade II-listed in 1980.
In 1991, the rear of the building was refurbished to accommodate a Tesco supermarket – a project on which Sika was also involved. Now the building is once again undergoing a transformation with work on the front elevation, to convert the building into 66 luxury studio, one, two and three-bedroom apartments, beginning in May.
Due to its age and city location, the building’s exterior had begun to show signs of deterioration, with carbonation-induced cracks, spalls and exposed concrete reinforcement appearing in several areas. Sealants around the structure were also showing signs of deterioration.
The implementation of a concrete repair and protection system with effective corrosion control measures was required to make good the damage and extend the life of the building. Sika had the solution for all requirements.
Contractors Structural Renovations, on behalf of development company IDM Properties, initial reparations involved cleaning and preparing the concrete surfaces and removing cracked and delaminated areas. In addition, exposed reinforcement was cleaned of all corrosion.
Once completed, Sika® MonoTop-610, a high-performance, one-component, cementitious polymer-modified primer was applied to the exposed reinforcement. Brush applied, Sika®MonoTop-610 simply required mixing with water to provide a superb, anti-corrosive protection to exposed reinforcement and bonding in preparation for concrete repairs using Sika® MonoTop-615, a high-build, hand-placed concrete repair mortar.
These products provide the perfect repair mortar system for delaminated, weak, damaged and deteriorated concrete.
To manage the steel corrosion within the structures, products from Sika’s Total Corrosion Management (TCM) portfolio were utilised. These included Sika® Ferrogard®-903+, a surface-applied, multi-functional liquid corrosion inhibitor, and for areas of previously-coated concrete – Sika® Margel VPI 580, which is inserted inside concrete structural elements close to the reinforcing steel to inhibit corrosion.
Sikagard®-545 W Elastofill was then applied. A crack-bridging intermediate coat, which closes pores, cavities and blowholes providing an ideal surface prior to the application of the concrete protection coating. Sikagard®-550 W Elastic, a high-performance elastic protective coating, offering protection from the elements which cause corrosion was then applied in the colour scheme required by the client.
"Sika’s concrete repair and protection system performed as superbly as expected. It came with a guarantee which offered great peace of mind to the clients and future residents of this fantastic building that the concrete repairs are of the highest quality. The potential for future maintenance has been minimised thanks to Sika’s effective corrosion management programme." Tom Haynes, Director at Structural Renovations
With the building’s concrete repair programme completed to the client’s deadline, the striking building’s transformation to a desirable and stylish and city residence can continue safe in the knowledge the façade will soon be returned to its original splendour and stand protected for many years to come.