Drywall over Plaster? doable?


Old 01-09-09, 11:44 AM
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Location: Pfafftown, NC 27040
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Drywall over Plaster? doable?

We're purchasing an older home and the laundry/mud room is plaster. My question is... instead of removing the damaged plaster is it possible to drywall over it?
Old 01-09-09, 12:39 PM
Join Date: Jul 2003
Location: California
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It's possible that a laundry/mud room is Portland cement plaster. It would be very hard to screw into that. It is also pretty hard to remove. I usually charge double what it would cost me to put it on for removal. If it is gypsum plaster then if you use long enough screws you can install drywall over it. Hit the studs.
How badly damaged is the plaster? Maybe it can be fixed with less trouble than drywalling over it.

If it is still a mud room how wet will the walls get. Does it have a floor drain so you can hose off the muddy boots after you've been in the corral?. If so and if you will use it like that you might want something more water resistant than drywall.
Old 01-09-09, 01:27 PM
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Location: North Central Indiana
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drywall over plaster

My first question would be what made the plaster fail? Has that problem been addressed? How will you deal with window/door trim.
Old 01-09-09, 03:24 PM
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Where i come from all the old city houses have lath and plaster walls in the interior and plaster directly on the brick inside walls. Just you some caulk adhesive and make a nice S back on forth down the wall per sheet. When you drywall screw make sure you hit some laths. On my rehab jobs I chip a little hole in the plaster and in between the lath to find the stud. mark that and there is a good spot to use a longer drywall screw to catch more wood. If the plaster is way to gone then We knock just the plaster off and drywall over lath
Been doing it for 30+ years on my rehab jobs
If for some reason the plaster is repairable Chip out old spots. By a bag of Structo lite. That is the old base for the plaster walls to begin with any good masonry supplyhouse should have it. Mix it up like peanut butter and also add some reg drywall compound in it. Use this for the thick coat and leave enough for the finish coat. If its smaller patches say 4 or 5 inches the compound with some structo lite will not shrink crack.
Structo-Lite Basecoat
Hear is a site to explain the structo-lite

Last edited by 21boat; 01-09-09 at 03:42 PM.
Old 01-09-09, 04:00 PM
Join Date: Jul 2003
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21 boat
StructoLite is notoriously slow setting. It often dries out and shrinks before it sets. What do you do to hurry up the set?

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