Ray Sackett wrote:Doing cob in TN. should be just fine. May want to consider 2" rigid foam panels in the middle of the cob for insulation. I've just finished building a cottage size cob house. I used 2" and 3" rigid foam panels sandwiched in the middle of the cob. Then built a small rocket mass heater inside for added warmth in winter. I cranked up the stove 3 or 4 hours before bedtime and it did just fine all night. Now getting into summer temps. and it stays 5 to 10 degrees cooler inside all day. This is middle Ga. weather. So we'll get several days in the 100's. Curious to see how it does this summer.