How to Fix Stucco Cracks

Stucco is a popular exterior finish for homes and buildings, providing a durable and aesthetically pleasing finish that can withstand harsh weather conditions. However, over time, stucco may develop cracks or other damage, which can compromise its integrity and reduce its lifespan. In this article, we’ll explore how professionals fix stucco cracks, from identifying the problem to implementing effective solutions.

Identifying Stucco Cracks

Before professionals can fix stucco cracks, they must first identify the type and severity of the cracks. There are several types of stucco cracks, including hairline cracks, spiderweb cracks, and wider structural cracks. Hairline cracks are typically less than 1/16 inch wide and don’t pose a structural threat, but they can be unsightly. Spiderweb cracks are more extensive and may indicate a problem with the stucco’s underlying substrate. Structural cracks, on the other hand, are wider than 1/16 inch and can indicate serious structural issues that require immediate attention.

Determining the Cause of Stucco Cracks

Once professionals have identified the type and severity of the stucco cracks, they must determine the underlying cause of the cracks. Common causes of stucco cracks include:

• Settlement: When the ground beneath a building settles, it can cause the building to shift and crack.
• Moisture: Moisture can penetrate the stucco and cause it to expand and contract, leading to cracks.
• Temperature changes: Extreme temperature changes can cause stucco to expand and contract, leading to cracks.
• Poor installation: If stucco is not installed properly, it can develop cracks over time.

Fixing Stucco Cracks

Once the cause of the stucco cracks has been identified, professionals can begin fixing the problem. Here are some common methods for fixing stucco cracks:

1. Filling and Patching

For small cracks, professionals may simply fill and patch the affected area. This involves using a stucco patching compound to fill the crack and blend it in with the surrounding stucco. The compound is applied in layers, allowing each layer to dry before adding the next.

2. Caulking

For hairline cracks, professionals may use caulk to fill the crack. This is a quick and easy fix that can be done in a matter of minutes. However, caulk is not recommended for wider or structural cracks, as it does not provide the necessary structural support.

3. Re-stuccoing

For more extensive damage, professionals may need to re-stucco the affected area. This involves removing the damaged stucco and applying a new layer of stucco over the underlying substrate. This method provides a more durable and long-lasting solution for stucco cracks.

4. Waterproofing

To prevent future cracks from forming, professionals may recommend applying a waterproofing agent to the stucco. This can help protect the stucco from moisture damage and prevent future cracks from forming.

Stucco cracks can be unsightly and pose a threat to the integrity of your home or building. However, by identifying the cause of the cracks and implementing effective solutions, professionals can fix stucco cracks and ensure the longevity and beauty of your stucco finish. If you notice any cracks or damage to your stucco, it’s important to contact a professional as soon as possible to prevent further damage and ensure the safety of your home or building.