Replacement of the Great Keep roof with an appropriate open oak truss design
The castle is one of the most complete examples of Norman architecture in Northern Ireland. Replacement of the Great Keep roof with an appropriate open oak truss design has secured its integrity and allowed further interpretive and conservation works within the castle complex. The area beneath the roof is now a healthier environment for staff, visitors and historical artefacts. Green Irish oak was pegged and the structure clad in oak boards before being finished with Cumbrian stone slate. The ridges of both hipped roofs are topped with louvred timber ventilation lanterns which provide passive ventilation.