Lime kilns were once commonplace across the Irish countryside, stone-built structures in which limestone was burned at high temperatures to produce quicklime. That lime was then spread across acidic boggy fields to improve soil fertility, or used in the making of mortar for building work. The kilns that remain are often mistaken for field shelters or simple rubble mounds, which is part of why they go unremarked.

The Pollnamal kiln is recorded as a monument, placing it within the broader landscape of rural industrial archaeology in the west of Ireland, where such structures were particularly common from the eighteenth century onward as improving landlords and tenant farmers alike sought to work land that might otherwise have been considered marginal. Beyond its existence as a recorded site in this townland, the documentary detail currently available is sparse, and what can be said with confidence is limited to its presence and its type.