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.
Structural Renovations recently completed structural repairs and associated works to a 1950s church in southwest London.
This Anglican church which is part of the Diocese of Southwark was built to serve the expanding post war residential area of Morden and North Cheam and is constructed from brickwork with large reinforced concrete window frames, the latter of which, after 7 decades required extensive repair both internally and externally.
Following the installation of suitable protection scaffolding was carefully erected behind the alter within the church and externally at each end of the building to provide a safe means of accessing the working areas.
All concrete was inspected, with defects being marked up for removal following agreement with Church’s structural engineer. Once the defective concrete had been removed all exposed reinforcement was mechanically cleaned to remove any build-up of corrosion, before being fully protected with the specified materials (Fosroc Limited). The prepared defects had temporary formwork fixed prior to reinstatement to the original surface profile, using a hand placed polymer modified mortar. All internal concrete repairs were finished using a colour-matched mortar, so as not to be obvious to the congregation.
Once the repairing was complete, we replaced a number of previously damaged coloured glass panes, before preparing and redecorating all Crittal window frames. All external concrete was coated using a pigmented anti-carbonation coating. Previously coated woodwork was also repaired and redecorated.
As part of our ongoing relationship with the Langham Estate, we have been successful in securing works to another building within their property portfolio.
Highlight house which was constructed in the early 20th century comprises of retail at ground/basement level and office space on the upper floors.
Our works are concerned with the basement only, where extensive waterproofing is required to all retaining walls and soffits/underside of pavements.
A number of repair details have been devised for this project, as the construction varies throughout and therefore requires differing treatments to prevent the future ingress of water.
Working closely with the structural engineer (RKK Engineering) and Flexcrete Technologies Limited we have been able to satisfy the requirements of the client, who ultimately wishes to let the area as a restaurant or similar usage.
All existing render has been removed to expose brickwork beneath. The brickwork needed to be scabbled to provide a key for the specialist waterproofing materials. At all changes of direction, such a junctions between walls and soffits a reinforcing membrane was installed within a 2 part modified cementitious slurry prior to full embedment within the modified render.
This 10 week project is now nearing its completion allowing for the fit out to be completed by others.
Refurbishment works were recently completed to a former house that now operates as serviced apartments in the Brompton area of London. The property which was originally constructed in the late 19th century and was converted a number of years ago to its current use.
The front and rear elevations had not been maintained for at least 20 years and therefore required extensive repairs and redecoration, including brickwork/pointing works, waterproofing to balcony areas, timber repair/replacement and redecoration to all previously painted timber and stonework.
The front elevation was accessed from traditional scaffolding but due to a lack of access to the rear elevation this area was completed by means of abseil.
Specialist products supplied by both Fosroc (stonework repairs and stone coatings) and Sika Parex (brickwork/pointing repairs) were used throughout the works.
The project was completed within the anticipated programme regardless of the poor weather that was experienced during the works.