Making the Kiln
Using the limited evidence from these sites, a circular, turf-walled kiln was built in May 2007. This structure was 1m in internal diameter at the base and 1m in height, with walls 0.6m wide at the base tapering to 0.3m at the top. The upper layers of turf were slightly corbelled, giving the firing chamber an internal diameter of about 0.8m at the top. The turves, cut in square or rectangular blocks (around 0.3 x 0.3m and 0.6 x 0.3m) to an approximate standard thickness of 0.15m, were dug from a loamy soil, and loosely laid in a version of English bond. Approximately 20 square metres of turf was used to construct the kiln. Rough flagstone blocks were occasionally added to the wall circuit to give added strength and stability and to level up individual courses of turf. The kiln was built in four hours by two people.