Maintaining and Repairing Plaster Mouldings

Plaster mouldings have been used for centuries to add decorative elements to homes and buildings. From intricate ceiling decorations to ornate cornices and mouldings, plaster has been a popular choice for adding a touch of elegance and sophistication to any space.

However, like any other material, plaster mouldings can become damaged or worn over time. In this article, we’ll discuss the importance of maintaining and repairing plaster mouldings, and provide tips on how to keep them looking their best.

Why Maintain and Repair Plaster Mouldings?

Plaster mouldings are not only decorative, but they also serve a functional purpose. They can help cover up imperfections in walls and ceilings, and add character and charm to a space. However, if they are not properly maintained and repaired, they can become a liability rather than an asset.

Prevent Further Damage

Damaged plaster mouldingby Dan Wayman (

One of the main reasons to maintain and repair plaster mouldings is to prevent further damage. Small cracks or chips can quickly turn into larger ones if left untreated, leading to more extensive and costly repairs down the line.

By regularly inspecting and repairing any damage, you can prevent it from spreading and causing more significant issues. This will not only save you money in the long run, but it will also help preserve the integrity and beauty of your plaster mouldings.

Preserve Historical Value

Many older homes and buildings feature decorative plaster mouldings that are part of their historical value. These mouldings may have been handcrafted and are unique to the building, making them irreplaceable.

By maintaining and repairing these mouldings, you are preserving a piece of history and ensuring that future generations can appreciate their beauty and craftsmanship.

Maintain Aesthetics

Plaster mouldings are often used to add a touch of elegance and sophistication to a space. However, if they are damaged or worn, they can have the opposite effect and make a room look neglected or outdated.

By maintaining and repairing your plaster mouldings, you can ensure that they continue to enhance the aesthetics of your space and add value to your home or building.

How to Maintain Plaster Mouldings

Maintaining plaster mouldings is relatively simple and can be done with a few basic tools and materials. Here are some tips to help you keep your plaster mouldings in top condition:

Regular Cleaning

Cleaning plaster mouldingby Chapman Chow (

Dust and dirt can accumulate on plaster mouldings, making them look dull and dirty. Regularly dusting and cleaning them with a soft cloth or brush can help keep them looking their best.

Avoid using harsh chemicals or abrasive cleaners, as these can damage the plaster. Instead, use a mild soap and water solution to gently clean the mouldings.

Repairing Small Cracks and Chips

Small cracks and chips are common in plaster mouldings, especially in older buildings. These can be easily repaired with a patching compound specifically designed for plaster.

First, clean the area around the crack or chip with a soft brush and remove any loose debris. Then, apply the patching compound with a putty knife, smoothing it out to match the surrounding surface. Once it has dried, sand it down to create a smooth finish.

Sealing and Protecting

To prevent further damage and preserve the appearance of your plaster mouldings, it’s essential to seal and protect them. This can be done with a clear sealant or wax, which will help prevent moisture from seeping into the plaster and causing damage.

Be sure to choose a sealant or wax that is specifically designed for use on plaster, as other products may not be suitable and could cause damage.

Repairing Damaged Plaster Mouldings

While regular maintenance can help prevent damage, sometimes repairs are necessary. Here are some tips for repairing damaged plaster mouldings:

Assess the Damage

Damaged plaster mouldingby Fredrick Lee (

Before attempting to repair a damaged plaster moulding, it’s essential to assess the extent of the damage. Small cracks and chips can often be repaired with a patching compound, but more extensive damage may require professional help.

If the damage is severe, it’s best to consult a professional plasterer who has experience in repairing and restoring plaster mouldings.

Gather the Necessary Tools and Materials

To repair damaged plaster mouldings, you will need a few basic tools and materials, including a putty knife, sandpaper, patching compound, and a sealant or wax.

It’s also a good idea to have a drop cloth or tarp to protect your floors and furniture from any debris or dust that may be created during the repair process.

Repairing Cracks and Chips

Small cracks and chips can be repaired using the same method as regular maintenance. Clean the area, apply the patching compound, and sand it down once it has dried.

For larger cracks or chips, you may need to use a plaster repair kit, which includes a mesh patch and a joint compound. Follow the instructions on the kit carefully to ensure a proper repair.

Replacing Missing Pieces

If a piece of your plaster moulding is missing, it will need to be replaced. This can be a more complicated process and may require the help of a professional.

First, you will need to create a mold of the missing piece using a silicone mold-making compound. Once the mold has set, you can use it to create a replica of the missing piece using a plaster mix.

Once the new piece has dried, you can attach it to the existing moulding using a strong adhesive. Be sure to follow the instructions on the adhesive carefully to ensure a secure bond.

Tips for Maintaining and Repairing Plaster Mouldings

Here are some additional tips to help you maintain and repair your plaster mouldings:

Be Gentle

Plaster is a delicate material, and it’s essential to handle it with care. When cleaning or repairing your plaster mouldings, be gentle to avoid causing further damage.

Use the Right Tools and Materials

Using the right tools and materials is crucial when maintaining and repairing plaster mouldings. Be sure to use products that are specifically designed for use on plaster to avoid causing damage.

Consult a Professional

If you are unsure about how to repair or maintain your plaster mouldings, it’s best to consult a professional. They will have the necessary expertise and experience to ensure that the job is done correctly and without causing further damage.


Plaster mouldings are a beautiful and functional addition to any space. By regularly maintaining and repairing them, you can ensure that they continue to enhance the aesthetics of your home or building and preserve their historical value.

Remember to be gentle when handling plaster, use the right tools and materials, and consult a professional if you are unsure about how to repair or maintain your plaster mouldings. With proper care, your plaster mouldings will continue to add character and charm to your space for years to come.

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At Cornices Centre Ltd, we offer a full range of traditional plaster moulding and decorative plasterwork. From wooden moulding, cornices to fibrous plaster roses, we produce the finest quality plaster mouldings for projects large and small.

Cornices Centre Team

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