The Lay Bothers Dormitory was built above a storage room. The remains of the vaulted ceiling of the storage space can be seen as a series of arches along the exterior East wall of the Cloister. The floor of the dormitory collapsed under heavy snow in 1825.

The remains of the dormitory were removed at a later date.

It was presumably converted into a window after the decline of lay brothers in the 15th century.