The west-facing front reveals an arched recess roughly two metres wide, and the stoking hole, where fuel was fed to maintain the fierce heat needed to burn limestone, remains visible. The funnel at the top has collapsed, but the loading ramp on the north side survives, giving a clear sense of how the whole structure functioned as a working unit rather than a single chamber.

Lime kilns of this type were once commonplace across rural Ireland, used to convert limestone into quicklime by heating it to very high temperatures. The resulting material was spread on fields to reduce soil acidity, a practice that became particularly widespread from the eighteenth century onwards as improving landlords and tenant farmers alike sought to increase agricultural yields. Building the kiln into a natural slope was standard practice; it allowed carts to be driven up the ramp to load raw limestone directly into the top, while workers tended the fire below through the stoking hole. The Ballinteosig example follows this familiar form closely, its roadside position suggesting it served the surrounding farmland and was accessible to those hauling stone from nearby.