Blown plaster - why removing wallpaper might lead to replastering.
- info624025
- Sep 1, 2023
- 2 min read
When it comes to decorating our homes, there's something timeless and classic about wallpaper. However, as decorating trends evolve, you might find yourself wanting a change in your interior design. Removing old wallpaper is a common step in this process, but what do you do when you discover blown plaster underneath? In this blog post, we'll explore what blown plaster is and why it often requires replastering your walls. Let's dive in!
What is Blown Plaster?
Blown plaster, also known as loose or cracked plaster, occurs when the plaster that covers your walls begins to separate from the underlying surface. This separation can be caused by various factors, including age, moisture damage, or even the previous application of wallpaper.

The Wallpaper Connection
One of the most common culprits behind blown plaster is the removal of wallpaper. Wallpaper can be applied to walls in several ways, including adhesives, glues, or paste. Over time, the moisture from these adhesives can seep into the underlying plaster, weakening its bond with the wall. As a result, when you decide to remove that old wallpaper, you might uncover the extent of the damage to your plaster.
Signs of Blown Plaster:
Visible Cracks and Peeling: The most obvious sign is when you notice cracks or areas where the plaster has started to peel away from the wall.
Bulging or Blisters: Blown plaster can sometimes form bulges or blisters on the wall's surface, creating an uneven and unsightly appearance.
Hollow Sounds: When you tap the wall, it might produce a hollow sound, indicating that the plaster has separated from the wall underneath.
Difficulty Removing Wallpaper: If you find it unusually challenging to remove wallpaper from a wall, it might be a sign that the plaster beneath has already begun to deteriorate.
Addressing Blown Plaster
Discovering blown plaster while removing wallpaper doesn't have to be a nightmare. Here's how you can address the issue and breathe new life into your walls:
Assessment: Start by assessing the extent of the damage. If it's a small area, you might be able to repair it without replastering. However, extensive damage may require a more comprehensive approach.
Patch and Repair: For minor damage, patching and repairing the affected areas can be a viable solution. Use a plaster patching compound to fill in cracks and gaps. Once it dries, sand it smooth and paint over it.
Replastering: In cases of severe damage, or if you prefer a completely fresh canvas, replastering is the best option. A professional plasterer can apply a new layer of plaster to your walls, ensuring a smooth and even finish.
Prime and Paint: After patching or replastering, it's crucial to prime your walls before painting. Primer helps the paint adhere better and provides a consistent finish.
Conclusion
While discovering blown plaster during wallpaper removal may seem like a setback, it's an opportunity to revitalize your walls and create a fresh, beautiful space. Whether you opt for patching or replastering, addressing the issue properly will ensure your walls look their best for years to come. So, don't be disheartened by blown plaster – embrace it as a chance to enhance your home's interior!