E7 | Rain Garden, Wrought Iron Railing | Ask This Old House

Jenn Nawada teams up with a water conservation expert in Portland, Oregon to help two homeowners install a rain garden; Ross Trethewey shares how moisture meters can detect unseen water damage; Mark McCullough helps a homeowner increase the safety of their concrete steps by installing a wrought iron railing and showcases how railings are made at an iron fabrication facility.