Structural Renovations Limited have recently undertaken a specialist masonry stabilisation project to a Grade II listed property in Berkshire, for a repeat business client.
Sindlesham Court was built in the Mid-17th Century for a prominent family in the area. It remained a large residential property until it was requisitioned in WWII to house female employees of the Miles Aircraft Company, based in Woodley. It is currently used as a Masonic Lodge and events venue.
Following a detailed survey it was established that part of the parapet wall was severely out of plumb (>110mm over a 1.0m height) and required stabilisation, together with areas of cracked masonry/brickwork below.
The defective length of parapet was carefully demolished and rebuilt before the installation of a Helifix Scheme.
As an Approved Installer for Helifix the newly built section of parapet was diamond drilled vertically down by 1.5m at 1.0m centres. Helifix SockFix anchors were then installed and secured in position using Helifix SockFix Grout, injected through a proprietary pressure vessel.
The cracked areas of brickwork below the grouted anchors in the parapet required Helifix HeliBeam to be installed, whereby Helifix HeliBar is embedded in Helifix HeliBond Grout before repointing to match surrounding brickwork.
Once installed both items described above ensure the parapet is tied to the main façade, to prevent future failure.
A 10 year Helifix Warranty was provided following completion.
Structural Renovations have recently completed another phase of works within the iconic Grade I listed, Lloyds Building, within the City of London.
The building was designed by the recently deceased Richard Rogers and is famous for having all services, such as lifts and air handling on the exterior of the structure, to maximise the internal space.
Over recent years Structural Renovations have been employed to carry out repairs to the various reinforced concrete elements of the building, using polymer modified repair mortars.
Our most recent visit required us to complete structural repairs within the vast atrium, together with external areas. The repairs needed to be colour matched, to blend in with original concrete, so it was necessary to reinstate the defective areas in two stages; structural repair mortar to within 15mm of the finished surface, followed by the application of an approved coloured cementitious mortar.
The works were completed from a scaffold erected 13 floors above ground and from the Lloyds Building’s house cradles.
All works were completed outside of normal working hours, to minimise disruption to the staff and visitors.
January saw us remobilise for the 3rd phase of concrete repair and protection works, this phase concentrating on the external elevation of this Hastings landmark building.
This imposing building designed by local architect, Henry Ward, specifically for F. J. Parsons (publishers and printers), was built in 1924 with extensive use of reinforced concrete.
The building remained in constant use until 1985, when the Hastings & St. Leonards Observer moved to other premises. The intervening years left the structure without maintenance, leading to severe deterioration.
We completed extensive concrete repairs to the internal elements of the building in 2019 and 2021, which has allowed the internal fit-out to subsequently take place.
This phase of works is concerned with the repair, corrosion control and anti-carbonation protection of the external beams, lintels and columns on the east, south and west elevations, all from scaffolding.
Due to the building’s proximity to the aggressive marine environment, it was decided that the concrete would benefit from the installation of sacrificial anodes to pacify ongoing corrosion of the buried mild steel reinforcement, prior to reinstatement using polymer modified repair mortars. Some locations were too small to accept the anodic protection and instead were treated with a liquid migrating corrosion inhibitor. Following completion of the corrosion control and concrete repairs a pigmented anti-carbonation coating system is being applied, which will not only offer increased protection to both repaired and existing areas but will provide uniform and improved aesthetics.
If you would like to receive further information on the products/techniques used on this project, please contact our office.
Structural Renovations Limited have completed a number of repair and waterproofing contracts for the City of London Corporation at the Barbican Estate.
We were initially asked to devise suitable remedial schemes for the differing issues being experienced at the Grade II listed site, where consideration needed to be given to residents, staff and the public and where noisy works were to be carefully programmed to suit all interested parties.
Our works to Speed House, Ben Jonson House, and John Trundle Court podia required us to isolate agreed locations, carefully lift the brick paving either side of the main movement joints and rake out all defective materials back to sound substrate. Following this preparation work we applied a 3 coat, glass fibre reinforced polyurethane membrane, dressed into the joint. The paving was subsequently reinstated and a new polyurethane jointing compound was used to reseal the joint and accommodate future movement in the structures.
Works at the rear of Lauderdale Tower, together with Wallside involved both waterproofing, to prevent ingress to the car parks below and repairs to exposed aggregate concrete, using a modified mortar containing the appropriate size, type and concentration of aggregate.
These projects, the last of which was completed this month mark the 10th successive year of working for the Estate, where we’ve built up a knowledge of the wide variety of structures, along with good working relationships with a number of the Corporation’s employee’s.
Structural Renovations Limited were recently employed as a specialist sub-contractor to complete various remedial works to a number of buildings across the South Kensington Campus. Due to programming issues our works were phased to include two separate visits.
Phase 1 of the works involved masonry stabilisation and modified render repairs to both the Huxley Building, 180 Queens Gate and the Blackett Laboratory, within the main campus.
The masonry stabilisation aspect of the works involved connecting the internal and external leaves together, using proprietary stainless-steel ties, dry fixed into each leaf. We also connected brickwork and blockwork to the reinforced concrete slabs using a different proprietary tie set in a 2-part epoxy/cementitious grout.
Modified render repairs were then carried out where the existing sand and cement materials had failed due to a lack of provision for movement. Joints were also formed to allow for future movement, which were sealed using a 1 part polyurethane joint sealant.
Phase 2 saw us return to site and carry out stone remedial works to 58 Prince’s Gate. This involved the localised removal of spalled and defective areas of the previously painted stone façade, preparation of the substrate, and subsequent reinstatement to the original surface profiles, using proprietary polymer modified mortars.
Structural Renovations Limited has recently completed phase one of the concrete repair, waterproofing and upgraded handrail works at the rear elevation of a 5 storey residential block close to central Croydon.
The works were secured after a sealed bid tender process and we mobilised on site in late August.
Following the erection of scaffold, the concrete was surveyed to identify the extent of defective concrete, which enabled concrete repairs to be carried out, using Fosroc repair products. A pigmented anti-carbonation coating, also by Fosroc was applied once the underside of the communal balcony slabs had been pressure washed. This not only affords additional protection from the elements but provides a uniform finish to both repaired and original concrete.
The top surfaces of the communal balcony slabs were then prepared to receive a fully reinforced, waterproof, polymethyl methacrylate (PMMA) resin system, produced by WestWood Liquid Technologies. The system was specified due to a number of factors: speed of application, durability and aesthetics, all of which were desired by the Client.
Additionally, as part of the refurbishment, we were instructed to upgrade the existing handrails, whereby additional security panels were affixed to close off large gaps between the horizontal rails, which were deemed unacceptable by today’s standards.
Further phases of work are planned for the building in the near future.