Fulling mills were a crucial part of the woollen trade: after cloth was woven, it was beaten and cleansed in water, often with the help of a mill-driven hammer mechanism, to thicken and mat the fibres into a more durable fabric. The process transformed raw woven cloth into something weatherproof and hard-wearing, and mills like the one at Hollyhill were once scattered across Ireland wherever fast-running water and a textile economy coincided.

Cork had a significant wool and cloth trade from the medieval period onwards, and fulling mills formed part of the broader infrastructure that supported it, sitting alongside corn mills and later flax mills in the county's river valleys. The specific history of the Hollyhill site, including when it was built, who operated it, and how long it remained in use, is not currently documented in available public records, which makes it one of those quietly enigmatic survivals, known to exist but not yet fully accounted for.