Stucco is a popular choice for exterior finishes due to its durability and attractive appearance. However, the process of applying stucco involves several steps to ensure a strong, long-lasting finish. Whether you’re considering stucco for a new build or a renovation, understanding the application process can help you appreciate the craftsmanship involved.
The Stucco Application Process: Step by Step
Applying stucco is a multi-step process that requires careful preparation and skilled execution. Here’s how it’s typically done:
- Surface Preparation: The process begins with preparing the building surface. This might involve cleaning the surface, applying a moisture barrier, and installing a metal lath or mesh for the stucco to adhere to.
- Scratch Coat Application: The first layer of stucco, known as the scratch coat, is applied over the metal lath. This layer is usually about 1/4 to 1/2 inch thick and is scored with horizontal grooves to help the next layer adhere properly.
- Curing the Scratch Coat: The scratch coat is left to cure for several hours to days, depending on the weather conditions. This curing time is crucial for ensuring the strength of the stucco.
- Brown Coat Application: Once the scratch coat is cured, the second layer, called the brown coat, is applied. This layer is thicker, typically around 3/8 inch, and is smoothed out to create an even surface.
- Curing the Brown Coat: Similar to the scratch coat, the brown coat needs to cure, often for a week or more. This layer forms the foundation for the final finish.
- Finish Coat Application: The final layer, known as the finish coat, is applied after the brown coat has cured. This layer can be textured and colored according to the desired aesthetic. The finish coat is usually thinner, around 1/8 inch, and provides the final appearance of the stucco.
- Curing the Finish Coat: After the finish coat is applied, it needs to cure properly. Depending on the weather and the type of stucco used, this can take several days.
- Final Inspection and Touch-Ups: Once the stucco has fully cured, a final inspection is done to check for any imperfections or areas that need touch-ups. This step ensures a flawless finish.
