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*The Angi rating for Plaster Repair companies in Roundup, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Plaster Repair needs.

*The HomeAdvisor rating for Plaster Repair companies in Roundup, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Plaster Repair needs.

Last update on May 31, 2026

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Avatar for Solid Ground Property Services, Inc
Solid Ground Property Services, Inc
5.0(
7
)
Plaster - InstallPlaster - RepairPlaster - Repair - For Business

Serving Roundup, MT and surrounding areas

Approved

In business since 2024

Free estimates

Warranties offered

"Shawn came to work on my washing machine that wasn’t operating. When the first repair didn’t fix the problem, he did more research and came back with another part that fixed the problem. I appreciate his communication about scheduling and about ordering necessary parts. I appreciate his commitment to solving the problem. And, I appreciate his work ethic. I would recommend Shawn to anyone in need of handyman type repair."
Bathroom Tilework
Bathroom Tilework
Bathroom Tilework
Bathroom Tilework
Bathroom Tilework

+11

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Plaster Repair questions, answered by experts

Drying alone can take 1 to 4 hours to dry to the touch per plaster layer, but some types of plaster take several hours longer to dry. However, this doesn’t mean the job is done because plaster doesn’t fully harden until it cures, which can take a few days to a couple of weeks. It may take even longer if you’re building a new, pretty thick plaster wall. Allow the plaster to cure before painting it.

Plaster is a pretty tough surface, but it can still sustain damage from things like bumping against it, water issues, dampness, extreme humidity changes, and plain old age. Most plaster walls last hundreds of years and will only be taken down to the base layer when major repairs are required. Being cautious around the wall, not placing furniture against it, and ensuring stable humidity are all great ways to reduce possible damage.

Yes, you can apply new plaster over an existing plaster surface, such as a wall or ceiling, provided the old plaster is in good condition. Before you begin, check the stability of the existing plaster. The surface must be clean, free of loose material, and have no peeling paint. It is also recommended to roughen the surface slightly to promote adhesion. For older plaster, applying a base coat like a PVA emulsion or a specific bonding agent or primer is crucial. This step makes the existing plaster less porous and ensures the new and old layers adhere properly for a smooth, long-lasting finish.

The tool you use to sand plaster will depend on the size of the project. If you’re just working on a small section of your wall to get rid of an uneven spot on the surface, hand-sanding might work. However, for larger projects, a drywall sander can make a huge difference when it comes to both time and elbow grease—and an orbital sander can help for detailed areas such as around ceiling fans.

While it’s most common to sand plaster dry, it is possible to wet-sand plaster, too. Doing so can reduce the amount of plaster dust released into the air and make it easier to work in smaller, more delicate areas (such as around wall trim). However, some people find that wet sanding leads to more imperfections, which is why larger walls are more often dry sanded to ensure an even finish.

The Roundup, MT homeowners’ guide to plaster repairs

From average costs to expert advice, get all the answers you need to get your job done.

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