I need to put a placque on a wall that is made of horsehair plaster. The house was built in the 1880s. If I use screw-in metal anchors designed for plaster could I expect them to hold their rated weight in this old horsehair plaster? Thanks.
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Replies
Every time I fasten to masonry it is different depending on the age and makeup of the material.
Masonry can deteriate over time or it may have been adversely affected by conditions. Also, the original mix might have been less than optimal.
Many times I've bought fasteners and tried them only to have to change to something else.
Try them and see how the first one feels. Does it feel secure?
I would recommend a regular picture hook v. the larger screw in anchor. Easily rated at 75 lbs they should hold most plaques short of an interstate hiway sign. The key is to penetrate w/o boogering up the surrounding plaster. Predrill if you think necessary or put a pc of tape over the location first and nail it in-straight.
If you are worried of the bounce with hammering, predrill the same size as the nail. If you hit lath, all the better-then use a finish screw-it'll never pull out.
the horsehair is a binder, it will should have wood lathe behind it.
unless there is something else you are worrying about?
How heavy is this plaque? The usual picture hanging methods won't work?
there is no ideal solution, but what I have gone to doing is to use a cap head GRK cabinet screw. 9/10 times, I hit wood lathe and the large head is good to keep the picture wire from sliding off. too much damage is done trying to use a nail or anything that pounds in.
Customers are so happy that down at the country club, they say to each other, "Call Paul, He has some kind of a special tool that does the job without ruining the wall"
If I miss the lathe, I just move up about an inch