Malt kilns were used to dry barley or other grain after it had been steeped and allowed to germinate, a necessary step in the production of malt for brewing or distilling. The drying was done over a slow heat, with the grain spread on a perforated floor above a furnace chamber below. Across Ireland, hundreds of these structures were built to serve local needs, and many have since collapsed or been absorbed into later farm buildings, which makes any surviving example worth pausing over.

The Creggauns kiln sits within a landscape that would have supported small-scale grain cultivation during the eighteenth and nineteenth centuries, when domestic brewing and illicit distilling were both common in Connacht. Kilns of this kind were sometimes attached to estate operations, sometimes to tenant farms, and their presence in the record suggests a degree of agricultural activity that the bare bogland and limestone terrain of south Galway does not always immediately suggest. The specific history of this particular structure, including who built it, when, and in what context, remains to be fully documented.