How to Find a Stud in a Lath and Plaster Wall

When faced with the task of hanging heavy objects or installing shelves on a plaster wall, it can be frustrating to find that standard stud finders are unable to accurately locate the studs. Fortunately, there is an alternative method that can help you find studs behind the plaster: using a strong magnet in combination with dental floss or string.

The key indicator that you have found a stud using this method is when the magnet sticks to the wall directly above a particular location. To begin, start by standing directly in front of the wall and tying one end of the floss or string securely to the magnet. Hold the other end in your hand, and then dangle the magnet against the wall.

Slowly move the magnet horizontally while maintaining a steady pace, paying close attention to any changes in resistance or pull. If you notice that the magnet suddenly sticks or attracts more strongly to the wall, it is likely that you have located a stud behind the plaster.

To ensure accurate readings, it is crucial to be patient and move the magnet at a consistent speed. Start from the top of the wall and work your way down, moving the magnet in a straight line horizontally. This method works because the wood lath in the wall is nailed to the studs and attracts the magnet.

In addition to using dental floss or string, you can also use a strong magnet to locate studs by paying attention to changes in resistance or pull as you move it along the wall. If the magnet suddenly sticks or attracts more strongly to the wall while moving horizontally, it is likely that you have located a stud behind the plaster.

By following these simple steps and using this method, you can confidently find studs behind the plaster on your lath and plaster walls, making it easier to hang heavy objects and install shelves.

Find stud in lath and plaster wall