The studs are typically on 16 inch centers in older work. If the walls are smooth plaster repairs are pretty easy, so you can use a small (1/8 inch) masonry bit to go looking for the studs. The baseboard is attached to the plaster grounds and not directly to the studs. At the baseboard they are often 2-3 inches wide (at windows 1-2 inches is common). These are typically 1 inch thick wood strips. To create a level wall plaster Âgrounds are used around all openings and edges were plaster ends. The baseboard nail locations are not a good indicator of studs in most plaster work. If the wall is an interior wall it is likely a stud wall with plaster. Plaster can be placed directly on a masonry wall. They should be very rigidly mounted into the studs for such a large television.ĭepending on the building construction you may not have studs. If you screw in the mount attaching screws and they pass through the plaster and lath and there is no longer resistance, you're hanging in thin air. You can also "sound" the walls by pounding lightly with a cloth covered hammer to try to tell where the studs are (the sound will be less hollow), but actually pinpointing the stud is going to be a bit tricky. You can locate a "stud finder" at the hardware store that theoretically locates the screws or nails holding the lath to the studs, but often they're not very effective. This is important, because the plaster itself won't hold such the TV, and if you just screw it into the lath, you'll likely pull out a large section of plaster. You'll screw through the plaster and the lath to reach the studs (about 3/4" inch to an inch behind the surface of the plaster). There will be studs behind the lath, on 16" or so centers. Plaster walls are mounted on lath, which is in turn nailed or screwed to studs.
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