Lime kilns were industrial furnaces used to burn limestone at intense heat, reducing it to quicklime for use as agricultural fertiliser and building mortar. This one is unusual for being a double kiln, two chambers operating side by side, their matching segmental arched openings, each roughly two and a half metres high and two and a half metres wide, facing north along what was once a working face of the quarry.

The structure is documented on the Ordnance Survey six-inch map of 1842, placing it firmly within the agricultural improvement era of the early nineteenth century, when demand for lime across Irish farmland was at its height. The design is practical and considered. A shallow horizontal ledge runs across the front wall just above the arched recesses, and the top of the kiln is enclosed by a low stone parapet with two stone-lined funnels, each around five metres in diameter, into which the raw limestone and fuel would have been loaded. The loading ramp to the rear is still largely intact, a long sloping approach some fifty metres in length and fifteen metres wide, which would have allowed carts to bring material up and tip it directly into the funnels from above. Both arched recesses are partially filled with rubble now, but the overall form is clear and coherent, the front wall largely sound, the ramp still readable as a piece of industrial infrastructure rather than simply a grassy rise.