Plastering is a common technique used to create smooth and even walls. It involves applying a layer of plaster over a wall surface, which can then be smoothed and shaped into the desired finish. While plastering is often done on new walls, it can also be used to repair damaged or painted walls. Plastering a painted wall can be a challenge, but with the right tools and techniques, it can be done effectively.

A freshly plastered wall not only looks great but it also provides a smooth surface that is ideal for painting or wallpapering. In this guide on how to plaster a painted wall, we will go through the steps to plaster a painted wall successfully.
Necessary Items
To begin plastering a painted wall, you will need the following items:
- Plaster
- Water
- Bucket
- Trowel
- Sandpaper
- Drywall repair compound (if there are any holes or cracks in the wall)
8 Things to Know Before You Start
1) Plan and Prepare
Before you begin plastering, it’s important to have a plan in place. Decide on the areas of the wall that need to be plastered, and make sure you have all the necessary items ready. It’s also a good idea to cover any furniture or flooring near the wall with drop cloths to protect them from any mess.
2) Choose the Right Plaster
There are different types of plaster available, such as gypsum and lime. For a painted wall, it’s best to use a gypsum-based plaster as it adheres well to painted surfaces. If the wall is damaged or has cracks, you may need to use a specific type of plaster designed for repairs.
3) Clean and Prepare the Surface

Before applying plaster, make sure the wall surface is clean and free of any loose debris or flaking paint. If there are any holes or cracks in the wall, fill them with a drywall repair compound and let it dry before proceeding.
4) Mix the Plaster
Follow the instructions on the plaster packaging to mix it with water. Use a clean bucket and stir until you have a smooth consistency, similar to pancake batter. It’s important not to mix too much plaster at once as it will start to harden quickly.
5) Wet the Wall
To help the plaster adhere to the painted wall, you will need to dampen it first. Use a spray bottle or wet cloth to dampen the entire surface of the wall. When plastering, make sure to work in small sections at a time so the wall stays dry.
6) Apply the Plaster
Using a trowel, scoop up some plaster and apply it to the wall in a thin layer. Spread it evenly over the surface, making sure to fill any cracks or holes. Use vertical and horizontal strokes to create a smooth and even layer. Don’t worry about achieving a perfect finish at this point.
7) Smooth and Shape the Plaster

After applying the first coat of plaster, use a clean trowel to smooth out any bumps or ridges. You can also add more plaster as needed to fill in any imperfections.
Once the first layer has dried, you can start shaping the plaster to create a smooth finish. Use a damp sponge or wet trowel to gently rub over the surface in a circular motion.
8) Sand and Finish
Once the plaster has completely dried, use sandpaper to lightly sand any rough spots or uneven areas. Wipe down the wall with a damp cloth to remove any dust before proceeding to paint or wallpaper the wall.
Plastering a painted wall may seem like a daunting task, but with the right preparation and techniques, it can be done effectively. Remember to plan and prepare before starting, choose the right type of plaster, and work in small sections at a time for best results.
By following these steps on how to plaster a painted wall, you can achieve a smooth and even wall surface that is ready for painting or wallpapering. So next time you come across a painted wall that needs some TLC, don’t be afraid to plaster it! With these tips in mind, you can tackle any plastering project with confidence.
12 Steps on How to Plaster a Painted Wall
Step 1: Prepare the Wall
Before starting to plaster, it is important to prepare the wall surface properly. This includes removing any loose debris or flaking paint and filling in any holes or cracks with a drywall repair compound. If the wall is very dirty, you may also need to clean it with a damp cloth or sponge.
Step 2: Gather Your Materials
Make sure you have all the necessary materials before starting. This includes plaster, water, a mixing bucket, a trowel, sandpaper, and any other tools needed for repairs. As mentioned earlier, it’s also a good idea to cover any nearby furniture or flooring with drop cloths to protect them from any mess.
Step 3: Choose the Right Plaster

As mentioned before, for a painted wall, it is best to use a gypsum-based plaster as it adheres well to painted surfaces. Make sure you choose the right type of plaster for the job, and follow the instructions on the packaging to mix it with water.
Step 4: Wet the Wall
Before applying plaster, dampen the wall surface with a spray bottle or wet cloth. This will help the plaster adhere better and prevent it from drying out too quickly. But be careful not to make the wall too wet, as this can affect the plaster’s consistency.
Step 5: Mix the Plaster
Follow the instructions on the plaster packaging to mix it with water. Use a clean bucket and stir until you have a smooth consistency, similar to pancake batter. It’s important not to mix too much plaster at once as it will start to harden quickly.
Step 6: Apply the First Coat
Using a trowel, scoop up some plaster and apply it to the wall in a thin layer. Spread it evenly over the surface, making sure to fill any cracks or holes. Use vertical and horizontal strokes to create a smooth and even layer. Don’t worry about achieving a perfect finish at this point, as the first coat is just a base layer.
Step 7: Smooth and Shape

After applying the first coat of plaster, use a clean trowel to smooth out any bumps or ridges. You can also add more plaster as needed to fill in any imperfections.
Once the first layer has dried, you can start shaping the plaster to create a smooth finish. Use a damp sponge or wet trowel to gently rub over the surface in a circular motion.
Step 8: Apply the Second Coat
Once the first coat has dried, you can apply a second coat of plaster for a more even and polished finish. Follow the same process as before, but this time, try to achieve a smoother and thinner layer of plaster. Make sure to fill in any remaining gaps or imperfections.
Step 9: Smooth and Shape Again
After the second coat has dried, use a wet sponge or trowel to smooth and shape the plaster once again. This will help achieve a flawless finish, so take your time and make small adjustments as needed.
Step 10: Sanding
Once the plaster has completely dried, use sandpaper to lightly sand any rough spots or uneven areas. Wipe down the wall with a damp cloth to remove any dust before proceeding to paint or wallpaper the wall.
Step 11: Finish off with Paint or Wallpaper
After completing all the steps above and allowing the plaster to fully dry, you can now finish off your wall with a fresh coat of paint or wallpaper. This will not only cover up any imperfections but also protect the plaster from damage.
Step 12: Clean Up

Finally, clean up any leftover plaster and tools, and remove drop cloths from furniture or flooring. Allow the plaster to fully dry before moving any furniture back in place. Congratulations, you have successfully plastered a painted wall!
Now, you can sit back and enjoy your newly refreshed wall. Remember, if at any point you feel overwhelmed or unsure, it’s always best to consult a professional for assistance.
Plastering a painted wall may seem like a daunting task, but with the right preparation and techniques, it can be done effectively. By following these 12 steps on how to plaster a painted wall, you can achieve a smooth and even wall surface that is ready for painting or wallpapering.
Remember to plan and prepare before starting, choose the right type of plaster, and work in small sections at a time for best results. With these tips in mind, you can tackle any plastering project with confidence. So don’t be afraid to give it a try and transform your walls into a beautiful and polished space.
8 Things to Avoid When Plastering a Painted Wall
Now that you know the steps to plaster a painted wall successfully, it’s also important to be aware of some common mistakes and pitfalls to avoid. Here are eight things to keep in mind when working on your project:
1. Not Preparing the Wall Properly
One of the most important steps in plastering a painted wall is preparing the surface properly. Refrain from removing loose debris or flaking paint or not filling in holes and cracks can result in an uneven finish.
2. Using the Wrong Type of Plaster
Using the wrong type of plaster for a painted wall can lead to poor adhesion and, ultimately, a failed project. Make sure to choose a gypsum-based plaster that is suitable for painted surfaces. So always read the packaging and follow instructions carefully.
3. Mixing Too Much Plaster at Once
As mentioned before, plaster starts to harden quickly once mixed with water. To save the material, mix only what you need for each section of the wall and work in small batches. And remember always to follow the mixing instructions on the packaging.
4. Not Dampening the Wall Before Applying Plaster

Dampening the wall before applying plaster is crucial for proper adhesion and a smooth finish. Skipping this step can result in poor workability and an uneven surface. But be careful not to make the wall too wet, as this can also affect the consistency of the plaster.
5. Applying Too Much Pressure When Smoothing
When smoothing out the plaster, it’s important to use light pressure and gentle strokes. Applying too much pressure or using a trowel that is too rigid can cause ridges and grooves in the surface, making it difficult to achieve a perfect finish.
6. Rushing the Drying Process
Plaster needs time to dry and cure properly before moving on to the next step or applying paint or wallpaper. Rushing this process can result in cracking, bubbling, or unevenness in the final finish. While it may be tempting to speed up the process, it’s best to allow sufficient drying time for best results.
7. Not Sanding or Smoothing Enough
Properly sanding and smoothing the plaster is key to achieving a flawless finish. Make sure to take your time and carefully inspect the surface for any imperfections before moving on to paint or wallpaper.
8. Failing to Clean Up Properly
Finally, make sure to clean up any leftover plaster and tools and remove drop cloths from furniture or flooring. Leaving behind debris or dried plaster can not only be a safety hazard but also affect the appearance of your project. So, take the time to properly clean up after completing your project.
By avoiding these common mistakes, you can ensure a successful plastering project and achieve the desired results. Remember to take your time and work diligently, and don’t hesitate to seek professional help if needed. With these tips on how to plaster a painted wall in mind, you can confidently tackle any plastering project and transform your walls into a beautiful and polished space.
8 Additional Tips for a Perfectly Plastered Painted Wall
In addition to avoiding common mistakes, here are eight additional tips to keep in mind when plastering a painted wall:
1. Use Quality Tools and Materials
Investing in good-quality tools and materials can make a big difference in the outcome of your project. Make sure to use high-quality plasters, trowels, and sandpaper for best results.
2. Work in Sections

Plastering a large wall in one go can be overwhelming and result in an inconsistent finish. It’s best to work in smaller sections, allowing you to focus on one area at a time and achieve a more even surface.
3. Practice Makes Perfect
If you’re new to plastering, it’s always a good idea to practice on a smaller or less visible area first. This will help you get familiar with the process and techniques before tackling a larger project. If possible, ask a friend or family member who has experience with plastering to guide you.
4. Protect Your Surroundings
Plastering can be messy, so make sure to protect your furniture and flooring from any splatters or spills. Cover them with drop cloths or plastic sheets before starting your project. Soaking a cloth in water and placing it over any exposed surfaces can also help prevent the plaster from sticking to them.
5. Keep Your Work Area Clean
It’s important to keep your work area clean throughout the process. This will not only make your job easier but also ensure a neater and more professional finish. Use a brush or damp cloth to remove any excess plaster from your tools and work area.
6. Don’t Overwork the Plaster
Once you have applied the plaster, avoid going over it again and again to try and fix imperfections. This can lead to a buildup of excess material and result in an uneven surface. Instead, focus on achieving a smooth finish with light strokes and minimal pressure.
7. Make Any Necessary Repairs First
If your painted wall has any cracks, chips, or holes, make sure to repair them before applying plaster. This will ensure a more even surface and prevent any future issues. For larger repairs, it may be necessary to use a patching compound before plastering.
8. Consider Hiring a Professional

Plastering can be a challenging and time-consuming task, especially for larger or more complex projects. If you’re not confident in your abilities or don’t have the time to dedicate to the project, consider hiring a professional plasterer. They have the experience and expertise to achieve a flawless finish and save you time and stress. So don’t be afraid to seek professional help if needed.
Plastering a painted wall may seem like a daunting task, but by avoiding common mistakes and following these additional tips, you can achieve a perfectly plastered surface to paint or wallpaper over. Remember to take your time, work in small sections, and use high-quality materials for the best results. And don’t be afraid to ask for help or seek professional assistance if needed.
Frequently Asked Questions
Here are some commonly asked questions about plastering a painted wall:
Is It Necessary to Dampen the Wall Before Applying Plaster?
Yes, dampening the wall is important for proper adhesion and a smooth finish. But be careful not to make the wall too wet, as this can affect the consistency of the plaster.
How Long Should I Wait Before Painting or Wallpapering Over Plastered Walls?
It’s best to wait at least 24 hours for the plaster to dry and cure before applying paint or wallpaper. However, drying times may vary depending on factors such as humidity and temperature. Always check the manufacturer’s instructions for specific drying times.
Can I Apply Plaster Over Existing Wallpaper?
No, plastering over existing wallpaper is not recommended, as it can result in a weak and uneven surface. For best results, it’s best to remove the wallpaper before applying plaster.
Should I Sand Between Coats of Plaster?
Yes, lightly sanding between coats of plaster is important for achieving a smooth and even finish. This also helps with adhesion between layers.
Can I Paint Directly Over the Plaster?
No, it’s important to prime the plaster before painting. This will help seal the surface and prevent any issues with adhesion or bubbling of the paint. So make sure to prepare your wall before painting for the best results properly.
Remember to always follow safety precautions when working with plaster, such as wearing protective gear and keeping the work area well-ventilated. With these tips and FAQs in mind, you can confidently tackle any plastering project and achieve professional results. So go ahead and transform your walls into a stunning canvas for your home decor.
Conclusion
Plastering a painted wall may seem like a daunting task, but with the proper techniques on how to plaster a painted wall, tools, and mindset, it can be a rewarding and satisfying project. By avoiding common mistakes and following these additional tips, you can achieve a perfectly plastered surface ready for paint or wallpaper.
And don’t forget to take your time and seek professional help if needed. So go ahead and give your walls the makeover they deserve. So go ahead and give your walls the makeover they deserve.