I did some more checking and Evans Ceramic Supply Store in Wichita, Kansas is the only store that carries Lincoln 60 Fireclay in my area, and they also carry the ceramic fiber roll which they cut to size and charge $6 per sq ft. So how many bags of the fireclay will I need if I use it for my cob mix instead of harvesting the clay myself? The more sacks of clay I purchase the cheaper the bag. If I buy 100#s it will cost me $30, that's $15 a bag. I'm going Tuesday to get it.
Hi Loretta; How much clay you will need depends on how you are planning to build your mass. If you plan on a traditional exposed cob bench (like Stacie) you will use quite a bit. If you plan on a covered bench you will need much less and it can be dirty.