Q: How do I know if my plaster wall needs repair?

• <div><p>You&rsquo;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. </p></div>

Question 1

Can you speed up plaster drying times?

Accepted Answer

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Yes, to some extent, you can speed up the time it takes plaster to dry and cure. Choose a time of year when humidity levels are somewhere in the middle, neither too high nor too low, to allow moisture to evaporate from the plaster effectively. Also, open a window or set up a fan in the room to improve ventilation.

Don't use a dehumidifier in an attempt to speed up drying time, as a dehumidifier may suck moisture from the air too quickly, leading to crumbly plaster.

Question 2

How do I know if my plaster wall needs repair?

Accepted Answer

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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.

Question 3

What damages plaster?

Accepted Answer

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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.

Question 4

Why is my plaster ceiling sagging?

Accepted Answer

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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.

Question 5

Can you plaster over regular drywall?

Accepted Answer

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You can plaster over regular drywall, but it's essential to prepare the surface properly. Before plastering, the drywall should be clean, free of dust, and any loose or peeling paint should be removed. Applying a primer specifically designed for plastering can improve adhesion. Some professionals recommend applying a base coat of plaster or joint compound to create a better surface for the plaster to adhere to. Proper preparation ensures a smooth and durable plaster finish over regular drywall.