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Verified Reviews for Plaster Repair pros in Thermal, CA

*The Angi rating for Plaster Repair companies in Thermal, CA 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 Thermal, CA 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 December 05, 2025

Find Plaster repair specialists in Thermal

Avatar for PG Plastering
PG Plastering
4.8(
19
)

Serving Thermal, CA and surrounding areas

In business since 2000

Free estimates

"Project: Repair and partially replace stucco surface of small retaining wall. Phil met with me and we discussed how to treat a short retaining wall that was losing the stucco surface after about 4 years since it was originally plastered. The wall was alowing water seepage to come thru the concrete block and lifting the original stucco finish off. Phil suggested a repair , consisting of first scraping all loose stucco off the wall and then applying an adhesive type undercoat followed by a total restucco of the wall. It was done very professionally , minimal debris, 2-day process , and it looks great. Now I just have to see how it holds up over the next 4-5 years . Highly recommend PG Plastering."
Response time2 hrs
Recommended by100%of homeowners
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Avatar for OM Construction Inc
OM Construction Inc
4.7(
151
)

Serving Thermal, CA and surrounding areas

In business since 1990

Free estimates

Emergency services offered

"Excellent, detailed work on all projects with reasonable prices initially hired for plastering work was so good hired Tony to repair a roof , patio renovation, stair renovation. Referred to neighbors"
Roofing Project
Additional Photos
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+86

Recommended by95%of homeowners
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Avatar for Superior Plastering - Unlicensed Contractor
Superior Plastering - Unlicensed Contractor
3.9(
8
)

Serving Thermal, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"They were able to come out in a timely manner and do some drywall repairs. When I noticed some needed touch up, they were willing to come back and make the area better. Like thier customer service."
Not Completed
Completed
Not Completed
Completed
Driveways

+2

Response time1 day
Response rate85%
Recommended by71%of homeowners
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Avatar for Ocean Seven Builders
Ocean Seven Builders
4.6(
68
)

Serving Thermal, CA and surrounding areas

In business since 1994

Free estimates

Emergency services offered

"Matt came to inspect our roof and found another tile that needed to be replaced in addition to the 2 that were already broken. He came the next day to do the job. In addition to replacing the tiles, he fixed other tiles that were previously repaired by another company. He was efficient and did an awesome job. Reasonable price and would use him again for any future jobs."
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Recommended by59%of homeowners
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Plaster Repair questions, answered by experts

All plaster walls will crack over time due to normal house settling and expansion and contraction from temperature and moisture changes. Small, thin hairline cracks are generally not serious and are mostly a cosmetic issue. However, larger or more significant cracks can indicate structural problems.

Here's how to tell the difference:

  • Cosmetic Cracks: Cracks that are 0.5 cm (0.2 inches) or thinner are typically cosmetic.

  • Structural Cracks: Cracks wider than 0.5 cm, excessive or deep cracks, multiple cracks in the same area, or cracks that span around corners can signify a structural or foundation issue. Cracks along the joints where walls meet the ceiling also warrant attention.

For cracks wider than 0.5 cm, structural repair is needed. If a crack is 2.5 cm (1 inch) or wider, or if you notice any signs of a structural problem, it is best to contact a plaster repair professional to assess the damage.

You’ll want to inspect your plaster walls for signs of damage before painting. If you notice soft spots, deep cracks, bubbling, or areas where the plaster is crumbling or pulling away from the wall, it likely needs repair. While small hairline cracks are common and likely cosmetic, you should address larger issues before painting to ensure a quality, smooth finish.

Technically speaking, you can use drywall primer over plasters. However, oil-based primers work the most effectively on wall plasters. Meanwhile, water-based primers work just as well with drywalls. Nowadays, there are also universal primers suitable for drywall and plaster. Overall, you will be fine as long as you are using a trustworthy brand.

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 ceilings can sag for several reasons. In some cases, the plaster and other building materials shift and come apart over time, which is why you’ll commonly find drooping plaster ceilings in older homes. Improper installation, foot traffic, and water damage—often from a leaky roof or a broken pipe—can also cause plaster ceilings to sag.

The Thermal, CA 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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