I need to attach a curtain pole (for a heavy curtain) above a window. To be consistent with another window in the same room, I'll need to affix a 4-inch wide strip of wood to the wall, and attach the curtain pole to that.
In a modern house with plasterboard walls, this would be fairly easy. However, my house is 130 years old, and the walls are lath-and-plaster with old-style, horsehair-bound plaster. This means that most fixings won't work, and I think I'll need to attach the wooden strip to the vertical studs in the wall.
However, I'm at a loss to know how to find the vertical studs behind the plaster. How can I do this? Do I need to remove a section of plaster?