I have some cement stairs outside of my house I was hunting near earlier today. I was getting a strong signal near the steps in which there are no visible nails or metal. Does anyone know if people use metal to build stairs (like inside or under the cement)? I dug a little around the steps and found nothing...am I just picking up a signal from the steps themselves? I think the house was built in the 70's if that helps. I only ask because I do not own the house..otherwise I would tear it up!