Gypsum plaster is a popular choice for internal wall plastering. It is easy to apply and requires less experienced manpower as compared to traditional cement mortar plastering. However, to ensure a perfect finish, it is important to properly prepare the wall surface and apply gypsum plaster correctly.
In this article, we will discuss in detail the procedure to apply gypsum plaster on the wall properly. Whether you’re a supplier looking to service your clients or a DIY Home enthusiast, you’ll find this article handy.
Preparation Beforehand
First things first. You need to prepare yourself with 2 key things before you’re onto your ultimate goal i.e. to achieve a smooth and professional-looking wall finish.
Those 2 key things are: Preparing your walls before plastering and preparing your gypsum mixture properly.
Preparing Walls for Gypsum Plastering
Before applying gypsum plaster on the wall, it is important to prepare the surface properly. The following are the correct steps:
- Clean the wall surface: Remove any dust, dirt, loose particles, or any old plaster from the wall surface using a wire brush or scraper.
- Wet the wall surface: Wet the wall surface thoroughly with clean water. This’ll prevent the gypsum plaster from drying too fast and cracking.
- Apply a bonding agent: Apply a bonding agent to the wall surface. A bonding agent creates a strong bond between the wall surface and the gypsum plaster.
Preparation before Applying Gypsum Plaster
Next, before applying gypsum plaster on the wall, it is important to prepare the mixture properly. Here are the steps to follow:
- Mix gypsum plaster: Mix the gypsum plaster with water according to the manufacturer’s instructions. Use a clean container and a mixing paddle to mix the plaster. Add water slowly to avoid lumps.
- Let the mixture rest: Let the mixture rest for 5 to 10 minutes to allow the plaster to absorb the water properly.
- Mix the plaster again: Mix the plaster again for a few seconds before applying it to the wall.
Tips to Achieve the Perfect Finish
- Apply the plaster in layers: Apply the plaster in layers of (3 to 4) mm thickness. Avoid applying a thick layer of plaster at once as it can lead to cracks and peel-offs.
- Smoothen the plaster: Smoothen the plaster using a trowel or a wooden float. This helps to achieve a smooth and even finish.
- Let the plaster dry: Let the plaster dry completely before applying the next layer. This can take anywhere from 24 to 48 hours depending on the weather conditions.
- Sand the plaster: Sand the plaster lightly using sandpaper to remove any rough spots or bumps.
- Apply a finishing coat: Apply a finishing coat of gypsum plaster to achieve a smooth and shiny finish.
Mistakes to Avoid while Applying Gypsum Plaster
To avoid common mistakes while applying gypsum plaster, keep the following points in mind:
- Don’t mix too much plaster: Mix only the amount of plaster that you need. Mixing too much plaster can lead to wastage and can be difficult to apply before it dries.
- Don’t apply plaster on a wet surface: Wait for the wall surface to dry completely before applying gypsum plaster. Applying plaster on a wet surface can lead to cracks and peel-offs.
- Don’t apply a thick layer of plaster: Avoid applying a thick plaster at once. This can lead to cracks and peel-offs. Apply the plaster in layers of 3 to 4 mm thickness.
- Don’t let the plaster dry too fast: To avoid cracks and peel-offs, avoid letting the plaster dry too fast. Wet the wall surface thoroughly before applying plaster and keep the room well-ventilated.
- Don’t use old or expired plaster: Using old or expired plaster can lead to poor-quality application and can result in a poor finish. Always use a fresh product and check the expiry date before buying.
Conclusion
Applying gypsum plaster on the wall is easy if proper precautions and steps are followed. You can achieve the perfect finish with gypsum plaster by properly preparing the wall surface, preparing the mixture, and following the tips discussed in this article. Avoiding common mistakes can also help you achieve a smooth and shiny finish.
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