Definition

Blistering in paint refers to the lifting of the paint film from the underlying surface, resulting in the formation of bubbles or blisters in the paint layer. This phenomenon can occur due to various factors such as heat, moisture, or a combination of both.

Basic Information

Paint blistering is synonymous with paint bubbling. It occurs when pockets of fluid or air develop between layers of dried paint. These bubbles can eventually burst, leaving behind damaged paint surfaces with holes and marks. Paint blistering can manifest shortly after painting or over a more extended period.

Common Causes

• Painting in direct sunlight or on a surface that is excessively hot

• Applying an oil-based or alkyd paint over a damp or wet surface

• Exposing fresh paint to dew, high humidity or rain

• Moisture infiltration through interior walls from sources like washrooms, kitchens or laundry rooms

Progression

Paint blistering begins with small bubbles or blisters that may go unnoticed initially but can worsen over time, spreading and deepening across the affected area. Factors like sunlight, moisture, and temperature fluctuations accelerate this process. If left untreated, blistering can lead to greater damage, including paint peeling and exposure of the underlying surface, highlighting the importance of timely intervention to preserve the integrity of the painted structure.

Solution

Identifying the cause of blistering is crucial for implementing effective solutions:

(Repair loose caulking and improve building ventilation to prevent recurrence)

• Remove blisters by scraping, sanding, or pressure-washing down to underlying coats of paint or primer. It's important to prioritize safety by wearing respirators and eye protection.

• After removing the paint, thoroughly clean the surface to eliminate dust particles and allow it to dry completely.

• Finally, choose a high-quality paint or oil system to recoat and ensure a long life expectancy for this surface moving forward. Choosing the best paint/oil/finish will restore the appearance and enhance the durability and lifespan of the painted surface. Ensure the surface temperature is below 90ºF (32ºC) during and immediately after paint application.

It's essential to select paints suited for the specific project to ensure long-lasting results and prevent future occurrences of blistering. Proper surface preparation, including addressing underlying issues such as moisture or heat exposure, is key to achieving a durable and visually appealing paint finish.

Kindly be advised that these recommendations are offered as a courtesy. We cannot ensure or accept liability for the outcomes achieved through your personal implementation of these methods. Should you require further clarification, feel free to consult a member of our team.