Bubbling or Bulging Plaster: Causes and How to Fix It
Bubbling or Bulging Plaster: Causes and How to Fix It
Blog Article
Bubbling or bulging plaster is a common problem in many Australian homes, and while it might look like a simple cosmetic issue, it often points to underlying moisture problems in your walls. It’s crucial to address these issues promptly to avoid more serious damage, including structural issues and potential health risks.
In this article, we’ll explain what causes plaster to bubble and bulge, why you should take action quickly, and how to repair it yourself.
What Causes Bubbling or Bulging Plaster?
1. Leaky Roofs
A leaky roof is one of the most common culprits of bubbling plaster. Water from a leaking roof can seep down through the walls, causing the plaster to lift and form bubbles.
This often happens in areas where the roof is damaged or old, allowing water to trickle in unnoticed.
2. Rising Dampness
Rising dampness is another major cause of bubbling plaster. This occurs when moisture from the ground rises through your home’s foundation and walls.
The moisture pushes the plaster upward, causing it to bubble and potentially damage the wall over time. This is more common in homes with poor drainage or areas with high moisture levels in the ground.
3. Condensation
High humidity in areas like bathrooms, kitchens, or laundry rooms can lead to condensation, especially on cooler walls. This moisture buildup can cause plaster to bubble and weaken.
Poor ventilation in these areas makes the problem worse, as moisture has nowhere to escape.
4. Poor Ventilation
Inadequate airflow in your home, particularly in spaces like attics and crawl spaces, can cause moisture to accumulate inside your walls. When moisture gets trapped and isn’t able to escape, it can make its way through your plaster, causing it to bubble and bulge.
This is often seen in older homes or areas with high humidity.
5. Leaks Around Windows and Doors
Water leakage around windows and doors can also lead to bubbling plaster. When seals around these openings break down, rainwater or even moisture from high humidity can seep into the walls, causing plaster to bubble.
6. Damage to Exterior Mortar or Bricks
Cracks in your home’s brickwork or mortar can provide a pathway for water to enter the interior walls, leading to moisture buildup and plaster damage. If your home has an old brick facade, this could be the cause of the problem, especially if the mortar has deteriorated over time.
Why You Should Fix Bubbling Plaster Quickly
If left unchecked, bubbling plaster can lead to serious issues. Here’s why you should address it as soon as possible:
- Structural Damage: Prolonged exposure to moisture can weaken the wall’s structure. Bubbling plaster may seem like a minor issue, but over time, the water can damage the underlying materials, leading to costly repairs.
- Mould Growth: Moisture creates the perfect environment for mould to thrive. If the problem persists, mould can grow behind the plaster, leading to health problems, especially for those with respiratory conditions.
How to Fix Bubbling Plaster
Here’s a simple step-by-step guide to fixing bubbling plaster:
1. Fix the Moisture Source:
Before repairing the plaster, you must identify and stop the moisture from getting into your walls. Whether it’s a leaky roof, rising dampness, or poor ventilation, fixing the source of the moisture is the priority.
2. Remove Damaged Plaster:
Use a putty knife or scraper to carefully remove the bubbled plaster. Make sure you take off all the damaged plaster so that you have a clean surface to work with.
3. Clean the Area:
Once the plaster is removed, clean the area thoroughly. Sweep up any debris or dust to ensure the surface is smooth and ready for the next step.
4. Apply Primer:
To help the new plaster adhere to the wall, apply a suitable primer. This step is essential for creating a solid foundation for the new plaster.
5. Patch the Plaster:
Mix and apply new plaster to fill the gaps. Smooth it out so that it’s level with the surrounding wall.
Let it set according to the manufacturer’s instructions.
6. Repaint the Wall:
Once the plaster has dried, repaint the wall to match the rest of the surface. This will give it a clean, fresh finish.
When to Call in the Professionals
In some cases, bubbling plaster can be caused by more serious moisture problems that are hard to identify or fix on your own. If you’re unsure about the cause or if the problem persists after you’ve made repairs, it’s a good idea to consult a professional plasterer or damp-proofing expert.
They can assess the situation, provide expert advice, and carry out repairs to ensure your home is protected from further damage.
Bubbling or bulging plaster is more than just an eyesore—it’s a sign that moisture is getting into your walls. By addressing the issue quickly, you can prevent costly structural damage, mould growth, and other problems.
Whether you choose to fix it yourself or hire ceiling fixers with Southern Ceiling Repairs, taking prompt action will help keep your home safe and dry. If you’re unsure about the source of the moisture or need help with repairs, don’t hesitate to reach out to an expert in plaster repair or damp-proofing. Report this page