If your looking for the studs to mount your dish on your roof, I have mine screwed into the Plywood and if it missed a stud i changed it to a bolt and went into the attic and put a nut and washer on it. before i tightened it I put some clear silicone caulk into the holes. And always mount it as low as you can so it's over the Overhang instead of a interior room.