News
Quadriga, working with Stockport Council, wins Coveted 2009 Conservation Design Award For Stockport Covered Market.
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Quadriga’s Kieran Gardiner Scoops Silver in the 2009 Construction Manager of the Year Awards.
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News
Quadriga Carries Out Final Restoration Work On Grade ll Harperley Hall In County Durham
Formerly the seat of the Wilkinson family, the 19th-century Grade II listed mansion is now owned by the National Police Improvement Agency and used only for forensic training.
Up to 900 students a year pass through the doors of the former stately home, which last year underwent an impressive new build to provide a state-of-the-art practical training block. The new facilities are used to teach forensic science students from all over the country and features some of the finest new technology available.
The new semi-circular 3 storey accommodation block and the 2 storey teaching block, have cedar boarding to the main elevations and mill finished standing seam aluminium roofs. The design takes into account environmental issues and the building was designed to achieve a BREEAM rating of ‘Excellent'. The existing Hall is Grade II Listed and set in extensive grounds overlooking the Wear Valley with many mature specimen trees.
Partly due to the successful extensive stone restoration works recently carried out
by Quadriga at Ushaw College and Elemore Hall in County Durham, the company were invited to tender by Mansell, the main contractor, for the the restoration project at the Grade ll Harperley Hall. The tender was successful and the restoration works carried out consisted of helifix crack stitching, the removal of all paint from feature stonework using grit blasting techniques and the removal of existing sand/cement and sand/lime render. The exterior stonework was repaired and replaced where necessary and lime wash was applied to the new render. The chimneys were painstakingly repaired and render applied with a scribed finish with all stonework being repointed and washed down with high pressure washers.
The project was completed at the end of May 2009. Quadriga is a company dedicated to preserving our English heritage and with the team's combined talent, commitment and experience; the work produced is of exceptional quality and to the highest standard.
For further information please contact Quadriga:
Rob Rowe, Quadriga, Gadbrook House, Gadbrook Park, Rudheath, Northwich, Cheshire CW9 7RG
Tel: 01606 330888
Fax: 01606 330777
Email: rrowe@quadrigaltd.com
www.quadrigaltd.com
Metropolitan Stone restores one of London's famous City landmarks - The London Underwriting Centre
The London Underwriting Centre, located in Mincing Lane in the heart of the City, is an ultra-modern construction, built on the spot where a nunnery stood 1000 years before.
From the outside the entrance is dominated by three large black horse statues, copied from those that stand in St. Mark's Square, Venice. Nicknamed Dollar, Sterling and Yen, they guard the steps leading to a majestic glass canopy that reaches up and points towards the sky.
Inside a bank of sixteen escalators is suspended from the top of a glazed atrium by clusters of steel rods attached to a ring beam - the tallest construction of its type in the world. Metropolitan Stone is currently working on the exterior cladding which is faced with flame textured and polished Brazilian Torcicoda granite, giving the building its distinctive pink appearance.
The restoration experts are cleaning and repairing the granite panels on all elevations using mechanical access cradles which are normally used by the window cleaners.
The stone restoration techniques employed include partial renewal, insitu surface restoration and consolidation. Each damaged area is cut back to a sound base. Then either new masonry is indented into the existing structure or reinforced repair mortars are used for insitu restoration. The restoration is due to take 35 weeks to complete.
Kingsway Square Development in Battersea
Kingsway Square is St James Homes’ redevelopment of the site of the former Westminster
Kingsway College in Battersea, London SW11. The development is primarily residential, which
will both preserve and enhance the heritage of this unique site. The development has been
built on the key cornerstones of St.James’; to develop sustainable, quality and design conscious
homes, which blend with their local surroundings.
After extensive consultation with stakeholders such as Wandsworth Borough Council and
English Heritage, as well as local residents, the development was given the go head seamlessly
merging newly built with refurbished Grade ll Listed buildings.
The unique history and character of the original buildings have been carefully maintained and
restored by Quadriga. The Portico which had been covered in cement slurry some years ago
was painstakingly removed using a chemical spraying system. Loose sections of the old and
damaged stone was cut back to reveal the original Bath stone and new stone was formed
using a reconstituted Bath stone pre-mix to replace original features such as scroll detail
The college opened its doors in 1894, with a ceremony presided over by the Prince of Wales.
To begin with it was known as Battersea Polytechnic, a name that indicated its progressive
intentions: to provide higher education for skilled workers across a wide range of industry
sectors. It was later renamed Westminster Kingsway College.
Some of the old boys and girls became famous. One was Alec (later Sir Alec) Issigonis, who
designed the iconic Austin Mini. Others from more recent years, include celebrity chefs Jamie
Oliver, Ainsley Harriot and Anthony Worrall Thompson.
Quadriga are currently working on the London Underwriting Centre.
Pictures One & Two: Quadriga working on the Cornices and the final finished exterior.
For further information please contact:
Mark Pearson on 01606 330888
Or Suzanne Whalley on 07973819906
www.quadrigaltd.com
Quadriga Completes Extensive Concrete Repairs to Cliff Gardens Bridge in Colwyn, North Wales.
Cliff Gardens bridge at Old Colwyn, North Wales is a reinforced concrete structure supporting the main A55 trunk road over local residential estate roads. The structure, constructed in the early 1980’s, is immediately adjacent to the promenade at Old Colwyn and, is managed by Conwy County Borough Council acting as agents for the North Wales Trunk Road Agency.
Damage to the reinforced concrete, arising from corrosion of the embedded steel reinforcement has been recorded over time and, following completion of an in-depth condition survey during 2008, the suspicion was confirmed that the airborne salts from the marine environment had played a major role in the initiation and progression of an ongoing corrosion process. Due to the level of damage and the extent of Chloride ion contamination from contact with the sea-water, it was obvious that the only long-term remedial solution to the damage to the retaining wall, adjacent to the Afon Colwyn, would be to install an Impressed Current
Cathodic Protection system; protection of this part of the structure has been achieved using a ribbon anode system embedded in either repaired areas or chases cut into the wall itself.
The patterns of damage to the main bridge structure itself presented a more complex problem in that, the correlation between chloride ion contamination, other recorded defects and, levels of damage were not entirely consistent throughout the structure. This meant that, whilst the marine environment itself was a consistent factor in providing an answer to the origin of the chloride contamination, the effects of that contamination were found to be entirely inconsistent; this resulted in a measure of uncertainty in relation to the immediate development of the most appropriate, permanent solution to the various problems that were found to exist.
In line with the strategic approach to repair and maintenance of structures taken by the Client, it was decided that more information was required in relation to the state of corrosion in the structure over time and, based on the assumption that some form of electro-chemical remedial solution may be required, trials of different systems to establish the most efficacious method of providing long-term protection. To examine the state of corrosion, a permanent monitoring system using linear polarisation resistance probes together with a series of embedded half cells and a permanent low voltage power supply was designed and installed and, using that equipment, information will be gathered over time to enable valued engineering judgements to be made.
With regard to the type of electro-chemical system that may, over time, be shown to be necessary, various factors were taken into account in selecting the most likely potential systems. These factors were predominantly associated with the construction of the bridge itself, the nature of damage and its’ causes and, the environment – the ability of the system to be flexible in extent of installation and future extension to meet varying environmental factors was also a serious consideration in the selection process.
The extensive concrete repairs together with the design and installation of electro-chemical works (Permanent Monitoring and Cathodic Protection trials) were carried out Quadriga Concepts Limited who were working in close association with both the Client
and framework contractor, Daniel Contractors (UK) Ltd.
For further information please contact Quadriga:
Terry Davies, Quadriga, Gadbrook
House, Gadbrook Park, Rudheath,
Northwich, Cheshire CW9 7RG
Tel: 01606 330888
Fax: 01606 330777
Email: TDavies@quadrigaltd.com
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