Before threshing could begin, harvested grain had to be dried to prevent spoilage and to make the husks brittle enough to separate cleanly. The corn-drying kiln was the solution: typically a small stone-built structure with a flue or fire-pit at the base and a perforated floor above, over which grain was spread and gently heated. They appear across Ireland in their hundreds, most of them now reduced to low stony outlines in fields, easily mistaken for field clearance or the remains of something else entirely.

The Ballyegan example sits within a part of Kerry where small-scale tillage was a feature of the agricultural economy well into the modern period, particularly in areas where subsistence farming meant that every grain crop mattered. Corn-drying kilns in Ireland are generally associated with the period from the early medieval era through to the nineteenth century, though many continued in use long after more industrial drying methods became available elsewhere. Their survival in the landscape, even as ruins, reflects the degree to which rural communities in places like Ballyegan depended on locally managed food processing rather than centralised facilities.