Slightly undercut the edges of the existing plaster to create a solid bond with the new plaster. First, using an old chisel or putty knife, remove any loose or crumbling plaster in the area that is to be repaired. Here’s how to take the sag out of your plaster ceiling using these nifty little gadgets. The disc also has many smaller holes scattered throughout its body into which spackle or drywall joint compound attaches itself to conceal the repair. The disc has a countersunk hole in the center through which a drywall screw is inserted. Many years ago a caller to our nationally syndicated radio program made us aware of a little known plaster repair device called a “plaster washer,” – a round metal disc about the size of a quarter (actually about one inch in diameter), which is used to hold up a sagging ceiling. Such was the case in the holiday classic movie National Lampoons Christmas Vacation when a bumbling and unsuspecting Chevy Chase went crashing through the ceiling onto a bunk bed below. Often it is caused when someone missteps in the attic – setting foot on the lath rather than on ceiling joist. However, a sagging ceiling isn’t always caused by a broken key.
This occurs when the key breaks and positive connection to the lath is lost. One of the most common problems with plaster is a sagging ceiling.
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