An electronic stud finder locates wooden studs inside walls by measuring changes in the
wall's density. Note that this tool usually does not work with metal studs or on plaster
walls; and that nails, wires, or metal pipes can throw off the readings.
Using an Electronic Stud Finder
Switch on the tool and slowly slide it along the wall. The tool will light up or beep when
you encounter the edge of a stud, and stop when you move past the stud, so you can
easily find the center.
Purchasing
Several models of electronic stud finders are available. The least expensive version
indicates the stud position with a row of lights. More expensive models add an audible
tone and have a deeper scanning range for working on thicker wall coverings. The basic
model is adequate for finding studs under a single layer of drywall.
Substitutes
The low-tech alternative to an electronic stud finder is to do a little detective work.
Often you can detect little dimples or spots of wood filler where baseboards have been
nailed to studs. Pound the wall lightly with the side of your hand until you find a spot
that doesn't sound hollow and seems stiffer. A bright light held against the wall will
often reveal where nails or screws attach the drywall to the stud. Whatever method you
use, when you think you have found the stud, drive a small nail into the spot. If you
are right, it will go into the stud. If you are wrong, you a have a very small repair to
make.
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