In the second hour, Dean addresses various home improvement topics, starting with a caller's question about wall insulation and the differences between plaster and drywall. He suggests options like removing plaster to install thick rockwool insulation or adding a new wall inside the existing one.

Dean revisits the concept of non-native grasses and their impact on insect life, emphasizing that native plants are essential for a healthy ecosystem. He explains that non-native lawns can be as detrimental as paving over the yard in terms of habitat.

The discussion shifts to water consumption, where Dean highlights the benefits of planting native California grasses, which require less water. He also advises against zeroscaping and plastic grass, advocating for planting more trees and maintaining some eastern grasses to cool the environment. Dean concludes with practical tips for reducing lawn water usage, such as proper irrigation and downsizing the lawn.