7 Causes of Paint Bubbling on Walls and How to Fix Them

Paint Bubbling on Walls

Paint bubbling on walls can be a frustrating issue that detracts from the beauty of your interior spaces. Understanding the common causes behind this problem is the first step toward finding effective solutions. In this comprehensive guide, we’ll explore seven frequent reasons why paint bubbles occur on walls and provide practical tips on how to fix them for a smooth and flawless finish.

How to Prevent Paint Bubbling on Walls?

Before diving into the remedy, it is essential to know the causes of paint bubbling on walls. Afterward, it would help if you fixed paint bubbling on walls by eliminating these root causes. PS Painting Services Singapore recommends the following tips that will help you locate the reasons why paint bubble on walls and their possible solutions.

1. Moisture Infiltration

One of the primary culprits of paint bubbling on walls is moisture infiltration. This can occur due to leaks in plumbing, condensation buildup, or high humidity levels within the room.

Solution: Identify and fix any sources of moisture, such as repairing leaks, improving ventilation, using a dehumidifier, or applying waterproofing sealants to vulnerable areas like bathrooms and kitchens. Before painting, ensure that the walls are completely dry to prevent moisture from getting trapped under the paint.

2. Poor Surface Preparation

Inadequate surface preparation is another common cause of paint bubbling. Painting over dirty, greasy, or damp surfaces can prevent proper paint adhesion and lead to bubbling issues.

Solution: Thoroughly clean the walls before painting by removing any dirt, grease, or residue. Use a mild detergent solution and water to wash the walls, then rinse with clean water and allow them to dry completely. Sanding rough areas and using a primer can also improve adhesion and prevent paint bubbling.

3. Application in High Temperatures or Direct Sunlight

Painting in high temperatures or direct sunlight can cause paint to dry too quickly, trapping air bubbles beneath the surface and resulting in bubbles as it cures.

Solution:

  1. Paint during cooler times of the day or when the room is shaded.
  2. Use proper painting techniques, such as working in smaller sections and maintaining a wet edge, to prevent rapid drying and air entrapment.
  3. If painting outdoors, consider using a sunshade or painting early in the morning or late in the afternoon when temperatures are lower.

Causes of Paint Bubbling on Walls

4. Excessive Humidity During Painting

Excessive humidity during the painting process can interfere with paint drying properly, leading to bubbling issues as moisture gets trapped within the paint film.

Solution:

  1. Monitor humidity levels in the room and paint when humidity is within the recommended range (typically around 40-50%).
  2. Use fans or dehumidifiers to control humidity levels during painting and drying.
  3. If painting in a high-humidity environment, consider using paints specifically designed for such conditions.

5. Using Low-Quality or Expired Paint

Low-quality or expired paint may contain additives or contaminants that can cause bubbling issues during application and curing.

Solution:

  1. Invest in high-quality paint from reputable brands and ensure it is within its recommended shelf life.
  2. Follow the manufacturer’s instructions for proper storage, handling, and application of the paint.
  3. Avoid diluting paint with excessive amounts of water or other additives, as this can affect its quality and performance.

6. Applying Too Many Coats Too Quickly

Applying multiple coats of paint slowly and allowing sufficient drying time between coats can lead to solvent entrapment and paint bubbling.

Solution:

  1. Follow the recommended drying times between coats as specified by the paint manufacturer.
  2. Avoid overloading the roller or brush with paint, and apply thin, even coats to prevent solvent entrapment.
  3. If necessary, use a primer between coats to improve adhesion and prevent bubbling.

Why Paint Bubbling on Walls

7. Chemical Reactions with Substrates

Certain substrates, such as old oil-based paints or incompatible coatings, can react chemically with new paint, causing bubbling or blistering issues.

Solution:

  1. Test for compatibility by applying a small test patch of paint in a hidden corner.
  2. If no adverse reactions occur after drying, proceed with painting.
  3. Remove any incompatible coatings or prime the surface with a suitable primer before painting. It’s

 It is essential to follow the manufacturer’s recommendations regarding substrate preparation and compatibility to avoid paint bubbling and other issues.

Conclusion

By addressing the root causes of paint bubbling on walls and following proper painting techniques and maintenance practices, you can prevent and resolve this common issue effectively. Remember to prioritize surface preparation, use high-quality materials, control environmental factors during painting, and follow manufacturer guidelines for best results. With these tips and solutions, you can enjoy a beautifully painted space free from unsightly paint bubbles, ensuring a smooth and long-lasting finish for your walls.

Frequently Asked Questions

As the fresh coat of paint dries and contracts, air or water trapped beneath it creates pockets. Some of these pockets naturally flatten or burst, reducing the visibility of the uneven surface.
Make sure each coat of paint is fully dry before applying another layer. If the previous coat hasn't dried completely before adding the next one, the additional moisture can lead to the formation of air pockets, resulting in a bubbled effect on the surface.
During cold weather, water vapor penetrates the walls and condenses. Over time, this condensed water seeps into the siding, saturating the paint and leading to blistering and peeling.