Does this work thru carpet and padding to find joists to repair squeeky floors?

Hello. StudSensor™ stud finders can locate joists in your floor, in DeepScan® mode, (scan depth up to 1 1/2") as long as your flooring does not have several layers of material with different levels of density, or materials that are denser than the wood joist that you're trying to find. Materials that interfere with a stud finder's ability to find floor joists include carpet and padding and various types of hardwood flooring. In addition, scanning through floor ceramic tile can produce the same irregular results. It is in these situations that we suggest getting a unit with a metal scanning mode to locate the nail heads to identify the floor joists. Thank you.