Castle Roy or Redcastle stands on a hummock or hill which has probably been manmade or artificially altered to improve the building's defences. There is no trace of ditch. The castle interior consists of a courtyard measuring 24m by 16 meters within massive high curtain walls in the form of a parallelogram. The remains of a tower srtands at the North angle and this appears to be the only tower ever built. The walls are about 2 meters thick, built from rubble cemented together with strong lime mortar and still standing 6-7m high in most places. The walls are penetrated by a 2meter wide doorway at the NE side whose pointed arch still survives on the interior; a pointed window opening on the North West side adjacent to the tower; and a break in the wall facing may have been made for the addition of a tower that was never built. Within the building at ground level in the west corner is an embrasure in the wall probably used for toilets. A projecting garderobe (toilet) chute in the outer wall above this indicated that there were internal buildings - but these would have been constructed from timber for which no trace remains today. Castly Roy was therefore simply a high wall and tower protecting those who lived in lean to buildings within the courtyard. Though the Castle is said to be the stronghold of the Comyn family its history has not survived. Its style and construction suggests a date of around the late12th and early and 13th Centuries.
