Historic Repair

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Heritage Project at Cambridge University. Peterhouse College - Fen Court Grade II Listing.

Historic sites pose a unique and interesting challenge.

Concrete Renovations Ltd recently completed the external masonry restoration work at Fen Court, part of Peterhouse College, Cambridge University. Having a reputation as established historical restoration contractors, Concrete Renovations Ltd were called in as Specialist Renovators to carry out lime mortar pebble dashing to the Penthouse level of Fen court. This was carefully colour matched after extensive trials to match the colour and texture of the pebbledash mortar and aggregate. As part of the project, Concrete Renovations also repaired the Lime Mortar masonry to the Grade 2 listed accommodation wing. Concrete repairs were carried out to the exposed aggregate copings stones, lintels and window sills. The Concrete repairs are now virtually invisible as a result of careful material blending, aggregate selection and painstaking workmanship.


Concrete Renovations Ltd have secured a concrete repair package estimated at £330,000.00 as part of the overall refurbishment of the Arup Building at Cambridge University.

Concrete Renovations Ltd have been employed by Kiers on the recommendation of Nicholas Hare Architects to utilise the colour and texture matching concrete repair system developed by Concrete Renovations Ltd over recent years for producing discrete and sympathetic repairs to grade 2 listed buildings.

The contract also includes the careful cleaning of the building using Concrete Renovations Ltd Doff technology and vacuum recovery systems to gently clean both the external and internal surfaces without damaging the fabric of the building.

The total project value is estimated at £30 million and when complete will house the extended Zoology Museum and the Babbage Lecture Theatre together with the recently established Cambridge Conservation Initiative.

The retention of the building is the first step in developing an exemplary approach to carbon management. Concrete Renovations Ltd discrete concrete and stone repair techniques have previously been successfully utilised during recent projects at Harvey Court, part of Gonville & Caius College, Fen Court at Peterhouse College and the Cripps Building at St Johns College all of which are grade 2 and grade 2* listed buildings.

Arup Building History:
The Arup building which is located on the new museums site in central Cambridge was designed by Phillip Dowson and completed in 1971. The building, which cost around £1.9 million, was erected to house a variety of university facilities: the zoology department and its museum, the metallurgy department and the computing centre. 


Concrete Renovations Ltd have secured a £600,000.00 concrete and stone repair contract for the restoration of one of Cambridge University's most iconic buildings.

The Cripps Building at St John’s College is undergoing major refurbishment and Concrete Renovations Ltd are carrying out the concrete repairs works to the Grade II* listed exterior. The works package also includes Portland Stone repairs and internal structural strengthening work utilising the Sika Carbidur system of plate bonding.
During the work, the external surfaces of the stucture will be gently cleaned using the 
DOFF cleaning system to remove decades of contamination and vegetable growth. The concrete surfaces will be repaired and protected using Remmers restoration mortar and protective coatings.

Repair Matching
Being Grade II* listed it is imperative that all concrete and Portland Stone repairs closely match the appearance of the existing structure. However; having received varying degrees of weathering over the years, the Cripps Building has many different colours, shades and textures to the concrete and stone and where heavily weathered aggregates are visible at the substrate surface. This makes it impossible to carry out a sympathetic repair using standard repair products. 
Careful preparation made it possible to match repairs to the existing building. By carefully weighing and mixing Restoration Mortar shades, a blend was found that was a suitable colour match for an area, selected aggregates were blended and added to the mortar to allow a finish and texture suitable for each repair. It was necessary to create and record many physical samples which could be offered in each location to find the correct mix for each individual repair. Completion expected Summer 2014.

Powell & Moya’s Cripps Building at St John’s College, Cambridge, which was listed in 2009 at Grade II*,  has enjoyed a good press from the time of its completion in 1967. The Cripps Building, accommodating 200 undergraduates, was the result of a benefaction remarkable even by Cambridge standards. The entire cost (over £1 million in 1967) was met by Humphrey Cripps (1915-2000), an alumnus of the college.


We were able to carry out the restoration of this domed roof chapel thanks to the combined efforts of English Heritage, S.B.D. Weber Ltd and our own technicians.


Here, the old and new meet, the great adjoining concrete porch protecting the steps which follow the line once formed by St. Michael's Avenue.

In 2002 Concrete Renovations were called in when the decision was taken to protect the concrete porch using the Sika Ferrogard 903 system. Concrete Renovations Ltd carried out the concrete repairs and protection works to the porch with little disturbance to the life and ministry of the Cathedral.

Project Showcase

Victorian School - Repair of early reinforced concrete

This grade II listed building pictured is situated in rural Buckinghamshire and is currently utilised as a school.


The concrete window surrounds were showing signs of deterioration, this deterioration was widespread over much of the school. here are examples of deterioriation.

The concrete window surrounds were showing signs of deterioration, this deterioration was widespread over much of the school. here are examples of deterioriation.


The concrete window surrounds were showing signs of deterioration, this deterioration was widespread over much of the school. here are examples of deterioriation.

Concrete Renovations were employed as the specialist subcontractor on this project to repair the window surrounds to their original profiles and colour, and to reduce the ongoing effects of time and corrosion.

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