PROJECT OVERVIEW

Sussex Asphalte were recently tasked with an extensive programme of remedial works at Herstmonceux Castle in East Sussex – a Grade II Listed building and a Scheduled Monument recognised on the National Heritage List for England. Dating back to the 15th century, Herstmonceux Castle is one of the earliest brick built castles in the UK and remains among the oldest significant brick structures still standing today. Its historical significance demanded the highest levels of craftsmanship, sensitivity, and technical expertise.

Working in close partnership with the main contractor, Valley Builders, Sussex Asphalte carried out multiple phases of repair and renovation. One of the key successes was the restoration of the viewing platform, carefully bringing it back to life in line with the client’s design requirements. Mastic asphalt was the primary choice for this project, not only does it provide unrivalled longevity, but it also aligns with traditional construction methods across many heritage sites in southern England.

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PROJECT CHALLENGES

The castle’s flat roofs, originally protected with mastic asphalt, were showing widespread signs of deterioration. While this traditional system is renowned for its durability – often lasting up to a century – several areas had fallen into serious disrepair, leading to water ingress and damage. Adding to the complexity, the gutter works were particularly intricate and difficult to access, and the project uncovered numerous unforeseen issues along the way. This required Sussex Asphalte to adapt quickly to an evolving programme of works, spread intermittently across a six-month period.