R-Value: A Measure of Insulation Effectiveness

From mud and straw to how we measure insulation effectiveness today

R-values are covered extensively but I wanted to distill the information in a way that could be easily understood. If you like the post, please support me by liking it.

R-values measure the effectiveness of insulation. Thousands of years ago, both the Egyptians and Vikings insulated their homes with mud and the latter also used straw. Mud has a negligibl…