What is the best style of wall box for installing in an existing gyp board
lath & plaster wall?
The plastic nail-in style looks easy in new construction, but it's hard to
see how to drive the
nail with an inch of gyp lath and plaster in the way. Would a metal box be
I'm talking about a 3-space box for 2 switches and a receptical.
If you're using a 3 gang box, you will be able to get enough of
an angle with a drill or screwgun to get two solid screws into
one side of it, the side that will be flush up against the stud
that you find.
If you do a good job of exposing the edge of the stud and
keeping the hole nice and tight, you'll get some support from
the "ears" on the box that will lay flush on the surface of
the drywall. Combine that with your two anchor screws that
will be in the stud, and you should have a solidly mounted
box. I would just pop two 1" drywall screws into it, on
a bit of an angle, but you can get super neat about it and
drill a couple of straight pilot holes (with your pivot head
screwdriver) and then use hex head screws and tighten them
straight in with a socket on a ratchet.
You will want a good support for this box. You can get the gangable switch
boxes at your local hardware or Home Depot and gang three of them together.
You could use a piece of 1" aluminum angle, top and bottom, in the cut hole
for the box. Put some heavy paneling glue on the aluminum angle and fasten
it so that the inside of the angle is on the edge of the hole and on the
back of the wall material. Clamp it in place and let set for a day or so.
Then, get the wiring into the back of the box and fit the box into the hole.
Drill a couple of holes, top and bottom ears, carefully, through the wall
material and into the aluminum backup. It may even be best to just mark the
holes that you want to drill and then take the box back out and hold the
aluminum steady while drilling. You can tap holes into the aluminum for
6-32 screws, or just use some sheet metal type screws.
Which is it??? "gyp board" aka drywall, or "lath (wood
or metal mesh lath?) and plaster"? Or both??? (somebody drywalled
right over top of lath & plasrer?)
If u are gonna say that I said something,
please say what I REALLY said. ($1 Earl)
<snipped stupid sig line>
It doesn't matter what is on the wall
("gyp board" aka drywall, or "lath (wood or metal mesh lath?)
you can use a plastic work box (made for this type of application) in any
They are sold at HD,Lowes, and any electrical supply store.
Raco Plastic Old Work Box
(single gang box)
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