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I have a house built in the 1930s with lath and plaster walls. I was planning to install a hook, so I needed to find a stud. My normal stud finder didn't work (as expected), so I used some rare earth magnets. However, I found that there is about 3-4 inches of something metal all along the top of the wall. This seems to extend to every wall on the floor. I am fairly new to this era house - what could be along the top of all the walls that would be made of metal?

top of wall

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  • Likely a metal corner.
    – Dan D.
    Commented Jan 1, 2018 at 3:35
  • Would a metal corner run along all walls? What is the purpose of a metal corner?
    – Erick T
    Commented Jan 1, 2018 at 3:42
  • does it extend to the ceiling?
    – jsotola
    Commented Jan 1, 2018 at 6:50
  • google metal lath plaster picture
    – jsotola
    Commented Jan 1, 2018 at 6:52
  • It goes from the ceiling down a few inches. If it was metal lath plaster mesh, I would think it would extend all the way down, no?
    – Erick T
    Commented Jan 1, 2018 at 9:12

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It is likely to be "drywall bead " used to make joins between plasterboard at internal an external corners. It makes it easier for builders or renovators to produce a clean sharp corner.

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  • Looking at the dimensions of where the metal is (via magnet), this looks about right. Thanks!
    – Erick T
    Commented Jan 2, 2018 at 0:01

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