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How to Fix Hairline Cracks in Stucco?

Stucco is a popular exterior finish known for its durability and longevity. However, hairline cracks can develop over time, compromising the stucco's structure. These hairline cracks can be unsightly and let moisture penetrate. This can lead to more significant problems.

If you want to know how to fix hairline cracks in stucco, this blog post is for you. This guide covers everything you need to learn about repairing hairline cracks in plaster. From materials to tools, we've got you covered.

Old Wall With Falling Paint
How To Fix Hairline Cracks In Stucco? 2

DIY Stucco Repair: Tips and Tricks for Dealing with Hairline Cracks

Step 1: Gather Your Materials

Before you repair your stucco, you’ll need to gather all the necessary materials. You'll require a good-quality stucco repair mix, trowel, and wire brush. You will also need a bucket, bonding agent, and paint. Make sure to purchase high-quality materials. It ensures your stucco repair job lasts for years.

Step 2: Inspect the Damaged Area

The next step is to inspect the damaged area thoroughly. Look for cracks that are less than 1/8 inch wide. These cracks are considered hairline cracks and can be repaired easily. If the crack is wider than 1/8 inch, it may require professional help. Check for any loose or chipping stucco around the crack as well.

Step 3: Prep the Area

The next step is to prep the area around the cracks. This involves clearing loose debris and washing the area with water and a mild detergent. Once the surface is clean, use a wire brush to remove any loose or uneven material around the crack. Doing so will give you a clean surface.

Step 4: Mix the Stucco Repair Solution

Follow the manufacturer's instructions to mix the repair mix. Once the mixture is ready, add the bonding agent to help the repair adhere to the existing stucco. Be sure to blend the bonding agent into the repair mix thoroughly. Mix only the repair solution you'll need, as it dries out quickly.

Step 5: Apply the Stucco Repair Solution

With the mix ready, it’s time to apply the solution to the hairline cracks. Using a trowel, apply enough repair solution to fill the gap. Smooth the mix using a scoop, ensuring it’s level with the surrounding area. You may need to apply the solution in layers to achieve a smooth finish. So make sure each layer dries before using the next.

Step 6: Paint or Seal the Patched Area

The final step is to paint or seal the patched area to protect it from moisture and weathering. Use a high-quality, water-resistant paint or sealer. Ensure it matches the color and texture of the surrounding stucco. Allow the paint or sealer to dry completely before exposing the area to rain or intense sunlight.

Professional Stucco Repair vs. DIY: Making the Right Choice

DIY Repair

One of the benefits of taking on a DIY project is the cost savings. DIY projects can be accomplished with the materials and tools you already have. Additionally, DIY repairs can be completed on your schedule or timeline.

Professional Stucco Repair

Working with a professional stucco repair company has numerous benefits. Skilled contractors are trained and experienced in identifying underlying issues. They also have the necessary equipment to complete the job efficiently.

Additionally, most professionals offer a warranty on their work. This ensures that any issues that arise after the repair is complete will be handled quickly.

Hiring a professional stucco contractor does come with a higher cost than a DIY project. However, the peace of mind and assured quality of the repair make it well worth the investment.

Making the Right Choice

Regardless of your choice, addressing hairline cracks in your stucco immediately is vital. Ignoring the issue can lead to more significant problems down the line. Before deciding, consider your personal skill level and your budget.

If you have some experience and feel confident in your abilities, a DIY project could be a viable option. However, if you're unsure, it's best to leave the repairs to the professionals.


Regarding hairline crack repairs in stucco, what works best for you will depend on your skill level and budget. While a DIY project can be cost-effective, it could lead to safety risks if not done correctly. Hiring a professional contractor ensures a safe option. Whatever you decide, address the issue immediately to avoid more significant problems.

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