Structural Renovations Limited are currently working to repair and waterproof canopies at a sheltered housing complex known as Isleden House in Islington.
The estate was built in 1948 and opened by Queen Mary the following year. In 1953 the estate was handed over to the City of London who have instructed these works.
Following an initial condition survey concrete repairs have been completed using proprietary repair products, followed by the application of a pigmented anti-carbonation coating, which will extend the life of both repaired and unrepaired concrete.
The top surface of the canopies have been prepared and subsequently treated using a glass fibre reinforced polyurethane waterproof membrane to further protect the concrete.
The above works form part of a larger scheme that we have been asked to assist the City of London, which will involve us returning to the estate in 2021.
Structural Renovations Limited have recently completed the first phase of concrete repair and specialist coatings to a large residential property in Surrey, known as The White House.
The house, designed by the eminent architect, Amyas Connell in 1930 was completed in 1932, in the Modern Movement style and was Grade II* listed in 1971.
Built using reinforced concrete, with flat roof it was last renovated externally in the 1990s and was showing extensive signs of deterioration to both the concrete and the coatings.
Following an initial diagnostic survey it was possible to establish the type and extent of works required to reinstate the structural integrity of the structure, where required and propose a suitable scheme for the subsequent overall protection of the building, whilst satisfying the requirements, of all interested parties, including English Heritage.
We assisted in the production of an approved specification, using Flexcrete technologies repair and coating products and mobilised on site in early September.
All externally listed elements of the house were pressured washed and hand scraped to remove loosely adhered coatings, followed by a full hammer test to identify all areas of hollow/spalling concrete. Where required concrete was broken out, square-cut and all exposed reinforcement prepared and treated, prior to reinstated with a polymer-modified repair mortar. The entire prepared surfaces then received an application of an elastomeric levelling compound prior to two coats of white flexible anti-carbonation paint. All specified products were water-based.
The project was carried out from fixed scaffold and all works were completed whilst the client was in residence.
We will return for a second phase of works in 2021, when all listed elements of the property unconnected with the house itself will be treated using the same specification.
Working closely with Fosroc Limited, Structural Renovations Limited have recently completed the refurbishment of the external concrete areas of Burwood Court in Chelmsford.
Burwood Court is spread over 4No. blocks comprising of residential properties across 3No. floors.
The works entailed the concrete repair and protection to the exposed concrete walkways linking the properties and the 3No. access stair towers. The repairs were identified by the clients representative, Stace LLP, at tender stage and were subsequently carried out using a combination of Fosroc Renderoc HB30, Renderoc ST05 and Nitofill TH & LV. The soffits and faces of the walkways were further protected using Fosroc Dekguard W.
The existing expansion joints to both the decks and soffits were raked out and replaced using Fosroc Nitoseal MS300 to the decks and Nitoseal MS60 to the soffits. Due to the cracking that was identified to the walkway decks, additional expansion joints were introduced to act as ‘crack inducers.’
The walkway decks and stair tower steps & landings were prepared and coated with the Fosroc Nitodek FS system, which included a primer, reinforced membrane and pigmented top coat. The system provides a waterproof anti-slip coating and the addition of Nitodek FS Hardener into each coat meant that we were able to return the walkways and staircases back to service with limited restricted access which was of paramount importance to significantly reduce the impact on the residents.
Structural Renovations Limited have recently completed concrete repair and coating works to the underside of a reinforced concrete slab over the car parking area of a large residential block of apartments, in Eastbourne.
The development, constructed in the late 1980’s, sits on columns above ground level and provides covered parking for the residents, as well as protection from flooding, as the beach/sea is only approximately 50m from the block.
Although the block is well maintained the exposed concrete ‘waffle’ slab, which forms the ground floor has never received any treatment and due to the aggressive marine environment, it had begun to deteriorate, with cracks and spalls forming in numerous locations.
The underside of the slab was surveyed by an independent testing company, to identify the extent of damage and propose suitable remedial action, which would protect the structure.
We secured the contract through competitive tender and provided a fixed price, lump sum to carry out repairs to existing defects, combined with preparing and coating the entire slab with a pigmented, anti-carbonation coating.
It was agreed that the works would be carried out in four phases, as our Client wished for the car park to remain live throughout the works and this was achieved by systematically screening off the working areas, to prevent damage to the adjacent parked cars, whilst allowing them to move freely in and out of the car park.
The works were completed to the agreed financial budget and approved contract programme period.
Structural Renovations were instructed during the COVID-19 Lockdown to commence on site as soon as it was deemed safe to do so.
Prior to mobilising it was essential for the Company to have procedures in place to mitigate the spread of the virus between site workers, residents of the building and the general public. All operations to be carried out were risk assessed and control measures developed, such as increased PPE, staggered break times and regular sanitising of plant.
All individuals involved with the project received a site-specific induction regarding the actual works and separate Tool-Box Talk regarding the ongoing COVID-19 pandemic.
The works at Sheldon House, a 1960s, 7 storey, purpose built block of flats involved the removal of brick slips at each floor level to expose the reinforced concrete slab edges. The condition of the slab edges could then be assessed and a greater understanding of the building’s construction could be established.
Structural repairs were completed, including the installation of new stainless steel reinforcement and a migrating corrosion inhibitor; applied to pacify any ongoing corrosion within the existing reinforcement.
The repaired slab edges were then ‘built-out’ to the face of the brickwork using a structural, polymer modified mortar and once sufficiently cured these were primed and received two coats of pigmented anti-carbonation coating.
In addition cracks within the brickwork were repaired using Helifix approved repair systems.
All works were completed from temporary electric cradles, which provided a safe, suitable and economical method of accessing this type of repair project.
Following the easing of the COVID-19 lockdown, Structural Renovations Limted mobilised at the world-famous theatre for two separate projects; one in the basement and one on the roof.
Prior to commencing on site we developed various procedures that would create a safe working environment for our operatives and theatre staff – the theatre remains closed to the public at this time.
The basement works involved waterproofing the beer cellar, which is situated in a vault beneath the pavement. The vault had already been waterproofed previously but the system had failed and significant amount water was entering the area.
All existing render was removed, to expose the brickwork and localised repairs were completed. Following this a waterproof bandage was installed and all junctions between walls and floor, followed by the application of a polymer modified, cementitious waterproof render. Once cured the render is able to be decorated.
The works above the stage roof required us to apply a fibreglass reinforced polyurethane coating to the rear of a brick parapet wall. The Theatre had experienced significant amounts of water entering the building and temporary repairs had failed to solve the problem.
The wall was thoroughly cleaned and any missing pointing/cracked bricks were made good with polyurethane mastic. Following this an application liquid applied, polyurethane membrane was applied to the wall and whilst wet, fibreglass was firmly embedded. A top-coat of polyurethane membrane was applied to fully encapsulate the fibreglass and form an effective barrier against the elements.