Listener feedback discusses adding Kiley to the regular lineup, another line of defense against biting insects, and more on the environmental impact of work trucks. Then Matt, Kiley, and Patrick take listener questions on lowering radon levels in a basement that already has a radon system, the validity of roof shingle warranties, the pros and cons of thermally-broken T-studs, and how to treat a crawlspace that shares a floor system with a conditioned basement.