When it comes to remodeling or refurbishing a space, people often explore various techniques to enhance the appearance of their walls. Applying plaster is a popular method that can create a unique and textured look. However, if you already have wallpaper on your walls, you might wonder if it is possible to apply plaster directly over it. This article will discuss whether or not you can apply plaster to wallpaper and provide guidance on alternative methods to achieve your desired wall finish.
The Challenge of Applying Plaster on Wallpaper:
Wallpaper is designed to adhere to the wall surface using adhesive, creating a smooth and even appearance. Plaster, on the other hand, requires a solid and slightly rough surface to properly adhere and dry. Since wallpaper is not porous, it poses several challenges if you attempt to apply plaster directly on top of it:
1. Adhesion Issues:
The adhesive used to attach wallpaper creates a barrier preventing the plaster from properly adhering to the wall. Consequently, the plaster may not bond well, leading to potential cracking or peeling.
2. Moisture Problems:
Plaster requires a curing process that involves water slowly evaporating from the surface to harden properly. However, when applied over wallpaper, the excess moisture from the plaster can become trapped, causing the wallpaper to loosen or bubble.
3. Uneven Surface:
Plaster is typically applied to create a textured finish, which can be challenging over wallpaper due to its smooth and flat nature. The irregularities and patterns of the wallpaper might show through the plaster, resulting in an inconsistent and visually unappealing texture.
Alternatives to Applying Plaster on Wallpaper:
Even though plastering directly onto wallpaper is not recommended, there are alternative approaches to achieving a similar effect without compromising the integrity of your walls:
1. Removing the Wallpaper:
The most effective and recommended approach is to remove the wallpaper before applying plaster. This involves thoroughly removing the wallpaper using a wallpaper steamer or a wallpaper removal solution. Once the wallpaper is removed, you can prepare the wall surface by cleaning, filling any holes or cracks, and then proceeding with applying the plaster.
2. Skim Coating:
If removing the wallpaper is not feasible or desirable, skim coating is an option to consider. Skim coating involves applying a thin layer of joint compound or plaster over the wallpaper to create a smooth surface. This layer will cover up the wallpaper and provide a substrate for painting or other decorative finishes. It is crucial to ensure a proper bond between the skim coat and wallpaper by preparing the surface, including sanding lightly and applying a primer before skim coating.
3. Faux Plaster Techniques:
In case you are looking for a textured finish without using actual plaster, there are various faux plaster techniques available. These techniques involve using paint and glazing materials to create the appearance of textured plaster. They can be applied directly over wallpaper, as long as the wallpaper is properly prepared and primed. Faux plaster techniques offer versatility in achieving different textures and can be a cost-effective alternative to traditional plastering.
While applying plaster directly to wallpaper is not recommended due to potential adhesion, moisture, and surface texture issues, there are alternative methods to achieve a desired textured wall finish. Removing the wallpaper before plastering or considering skim coating and faux plaster techniques are effective options to ensure a durable and visually appealing result. It’s important to assess the condition of your walls, choose the appropriate method, and prepare the surface adequately to achieve the best outcome for your remodeling project.