Galvanized ducting buried under concrete slabs can collect water, debris or worse. There is an air duct cleaning system that not only cleans your ducts, but coats them with a waterproofing compound. This system uses your existing ductwork, so no need to install new ducts.
In this Newsletter, it's Summer, working on top of Mt. Washington for the auto road race, Bosch's new laser distance measurer, high-quality windows for a new home, pressuring washing a deck, advertising right here in the newsletter and AsktheBuilder on Facebook.
In cases where stud finders don't work, or if you don't have a stud detector, you can locate framing studs the old fashion way. Wall studs can be found using a nail, a hammer and a little observation.