Patrick, Kiley, and Matt start the show with more feedback about cool stuff people find in old walls before getting schooled by an infrared-camera expert on the phenomenon of emissivity and how it skewed their beer-koozie experiment. Then it's on to questions about building gable-end roof extensions for an insulation retrofit, why there's a separate code for old buildings (and whether or not anyone even uses it), how to make an attached garage part of a home's conditioned space, and options for attractive gutters when there's a tight budget.