On the road from Carlops to Upper Whitfield, 1km for the A702, there are a pair of double brick lined Draw-kilns. This is a rectangular building containing two conical brick built pots open at the top.
A long loading ramp slopes away to the rear leading to the limestone quarry (now filled in).
The limestone was cut at the quarry then hauled up the ramp to the top of the kiln. Here it was broken up and the stone and fuel loaded into the pots from the top of the kiln. There was a grate at the bottom where the fire was kindled. Draw-kilns could be burnt continuously, usually throughout the summer, the lime was raked out daily from a grate in the draw holes at the base.
These kilns were working in 1791 and in 1837. Kilns of this type first came into use in Scotland in the 1750s.