Cintec Technology Aids in Restoration of Award-Winning 12th Century Castle

Words: Dan Kamys

Restored Astley Castle recipient of prestigious Riba Stirling Prize for Architecture

Astley Castle
Castle interior
Castle interior

Cintec International, a leader in the field of structural masonry retrofit strengthening, repair, and preservation, reports that its patented anchors were used in the restoration of Astley Castle in Warwickshire, England. Following its renovations, Astley Castle was awarded the prestigious Riba Stirling Prize for Architecture.

Cintec teamed up with architects and engineers from Mann Williams and Newport-based Protectahome to restore the castle. Cintec assisted Protectahome with the first phase of restoration, which included structural repairs and stabilizing the remaining walls of the building prior to rebuilding. Cintec’s anchors were used to “stitch together” and strengthen the walls.

As you can see, the restoration was not simply a patch job.
As you can see, the restoration was not simply a patch job.

The process of restoring Astley Castle involved using a diamond drill to insert steel anchors into the building. Once in place, grout was pumped into a special sleeve surrounding the anchor, and air pumped out. Cores removed during this process were retained and reused where the anchors were installed, leaving an almost invisible repair. The work has ensured the survival of the original walls, allowing the award-winning holiday home to be built within the shell of the ancient castle.

A view of the castle exterior and surrounding wall.
A view of the castle exterior and surrounding wall.
The castle is now available for vacation rentals.
The castle is now available for vacation rentals.

The Riba Stirling Prize is the UK’s most prestigious architectural award. Judging is based upon original, imaginative and well-executed designs that excellently meet the needs of their users and inspire those who use and visit them.

“The restoration work on Astley Castle was an impressive enterprise, as anyone who saw the castle prior to its transformation could have been forgiven for thinking it a hopeless ruin,” said Peter James, managing director of Cintec International said. “To be awarded the Riba Stirling Prize demonstrates the true extent of its transformation. It has now been turned into a structurally stable building that will stand the test of time and can be enjoyed by many people in its reincarnation as a holiday home.”

Cintec anchors have been used to restore historically significant buildings across the globe including Windsor Castle, the White House, and extensive work on Egypt’s pyramids.

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About Astley Castle

Astley Castle
The castle now makes the most of the views of the surrounding parkland.

In winter 2015, Masonry Design featured Astley Castle on the cover, and we went in-depth on the restoration. Here’s a look at some of the facts related to the history of the structure:

The castle dates back to the 13th century, and was on the verge of collapse following a fire in 1978. In the 1990s, the property came to the attention of The Landmark Trust, which vowed to restore the neglected castle. Today, it is used as a rental property for tourists. The Trust says of the landmark: “Groundbreaking modern accommodation has been inserted within the ruined walls of this ancient moated site to combine the thrill of modern architecture with the atmosphere of an ancient place.”

According to the Trust, the site includes the moated castle, gateway and curtain walls, lake, a church, and the ghost of pleasure gardens in a picturesque landscape. In 2005, the Trust launched an open competition to find the best restoration plan that would create good, modern accommodation within the ancient ruins. The winning scheme, the Trust reports, by architects Mann Williams, maintains the sense of life and living within the castle, while making the most of the views – both into and out of the site.

As The Landmark Trust explains: “After careful recording, those parts of the building beyond pragmatic repair were taken down. The new-build introduced also consolidates and ties together what could be saved of the original fabric as unobtrusively as possible, leaving the castle’s form in the landscape largely unchanged. There was further work on the wider setting, including repairs to the curtain walls and moat, and the 18th-century Gothic stable block. The historic parkland surrounding the moated site, much of which is a Scheduled Monument, has been opened up with public trails.

The castle’s early days
By the early 12th century, the castle was held by Philip de Estlega (Astley) from the Earl of Warwick. Philip’s grandson Thomas de Estleye was killed at the Battle of Evesham fighting with Simon de Montfort in 1265. The castle was crenellated [having open spaces at the top of a wall so that people can shoot guns and cannons outward] and moated in 1266, when it briefly changed hands before reverting to the Astleys. By 1420, the manor had passed through marriage to the Grey family and became entangled with the succession to the throne of England.

It was under the Greys in the late 15th century that the castle achieved its most mature form. However, after the death of Edward VI in July 1553, Henry Grey, Duke of Suffolk seized the initiative and placed his daughter, Lady Jane Grey, on the throne. Jane’s reign lasted just nine days, before Mary I’s superior claims prevailed. Both Jane and later her father were beheaded for treason—Lord Grey rebelled a second time in January 1554 and was captured in a hollow oak tree at Astley.

In 1600, the castle was bought by Sir Edward Chamberlain. The Chamberlains restored the church and improved the castle. During the Civil War in the 1640s, Astley became a garrison for Parliamentary soldiers. In 1674, it was bought by the Newdigate family, who owned the neighboring Arbury Estate, and the castle became a subsidiary dwelling. In the 1770s, a Sir John Astley leased the castle briefly and was responsible for the construction of the stables and coach house.

Requisitioned during World War II for convalescing service men, a dilapidated Astley Castle was restored by the Tunnicliffes in the 1950s as a hotel. The castle completed its slide from grace when it was gutted by a mysterious fire in 1978, just days after its lease had expired. Vandalism, unauthorized stripping out, and collapse made its plight still worse. For many years, no solution could be found to give it a future and Astley Castle became a ruin. By 2007, English Heritage had listed it as one of the 16 most endangered sites in Britain.





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