While possible, wallpapering directly over gloss paint is not recommended for best results. The smooth, non-porous surface of gloss paint hinders proper adhesion, potentially leading to peeling or bubbling. The best approach involves preparation to ensure a long-lasting and aesthetically pleasing finish.
Steps to Prepare Gloss Paint for Wallpaper
Here's a breakdown of the recommended process:
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Clean the Surface: Thoroughly clean the gloss painted wall to remove any dirt, grease, or grime. Use a degreasing cleaner and rinse with clean water. Allow the wall to dry completely.
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Sand the Gloss: Sanding the glossy surface is crucial. Use medium-grit sandpaper (around 120-grit) to roughen the paint. This creates a better key for the wallpaper adhesive to grip. Focus on dulling the shine of the gloss paint. Wipe away sanding dust with a damp cloth and allow to dry.
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Apply a Primer (Highly Recommended): Applying a wallpaper primer or sizing is highly recommended, especially over glossy surfaces. Primer performs several important functions:
- Enhances Adhesion: Primer creates a porous surface that wallpaper adhesive can bond to effectively.
- Seals the Surface: Primer seals the sanded gloss paint, preventing moisture from the wallpaper paste from penetrating and causing issues later.
- Provides a Uniform Surface: Primer ensures a consistent surface for the wallpaper, minimizing variations in texture or color that might show through.
Follow the primer manufacturer's instructions for application and drying time. Usually, one or two coats are sufficient.
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Hang the Wallpaper: Once the primer is completely dry, you can proceed with hanging your wallpaper according to the manufacturer's instructions.
Why Preparation is Essential
Wallpaper relies on a strong bond with the underlying surface. Gloss paint's inherent smoothness and lack of porosity directly impede this bond. Without proper preparation, the wallpaper is prone to:
- Peeling: The wallpaper may begin to peel away from the wall, particularly at seams or edges.
- Bubbling: Air pockets can form beneath the wallpaper, creating unsightly bubbles.
- Poor Adhesion: The wallpaper may not adhere evenly, resulting in a patchy or uneven appearance.
Alternative Considerations
- Consider Removing the Gloss Paint: If the gloss paint is old or in poor condition, consider removing it entirely before wallpapering. This provides the most reliable surface for wallpaper adhesion.
By taking the time to properly prepare the gloss painted surface, you can significantly improve the chances of a successful and long-lasting wallpaper installation.
