What Causes Paint To Peel Beneath An External Window?

Paint peeling under exterior windows is a common issue caused by moisture damage and poor paint adhesion. The main causes include water damage, poor attic ventilation, overflowing gutters, or misdirected sprinklers. To fix exterior paint cracks, it is essential to identify and eliminate any potential issues.

The five most common reasons for new paint peeling include not properly prepping the surface, excessive humidity, condensation building on the windows, and improper surface preparation. Before applying a new coat of paint, it is crucial to sand off the old paint and ensure that the silicone/render/brick pointing is in good condition. High humidity can also lead to paint peeling under certain circumstances.

Meanwhile, condensation building on the windows, especially on cold days, can cause the paint to bubble up and peel off. Moisture from a leak can cause paint to peel or cause mold and mildew growth. These issues can occur indoors or outdoors.

To prevent paint peeling, it is essential to clean the sidings of a house with a pressure washer, ensure adequate surface preparation, and avoid using the wrong paint initially. Another common culprit is poorly sealed, improperly caulked framing, or caulking that has cracked or peeled, allowing water to seep into the paint.

In summary, paint peeling under exterior windows is a common issue that can be addressed by addressing moisture damage, poor adhesion, and proper surface preparation. By following these steps, you can prevent the peeling of your home’s exterior paint job and maintain its appearance.