Alternative to Stud Finders

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.

Source: http://www.askthebuilder.com/888_Alternative_to_Stud_Finders.shtml

builder contractor builders building a house building a retaining wall