Stucco application is a well-known method for wall finishing, traditionally done using a hock and trowel. However, this method requires considerable skill to achieve a visually appealing result. An alternative approach is spraying stucco, which raises the question: Can stucco be effectively sprayed?
Spraying Stucco: A Feasible Method
Yes, spraying stucco on walls is a viable alternative to hand application. This technique encompasses all stucco coats, from base to finish, and is suitable for both cement-based and acrylic/synthetic materials. However, it requires different types of spraying equipment for various materials, leading to some confusion. This article aims to clarify these complexities in a straightforward manner.
The Process of Spraying Base Coats
Base coats of stucco usually range in thickness from 3/8″ to 1/2″. To achieve this depth, a substantial amount of material needs to be sprayed onto the wall. Sprayers for base coats are capable of moving large quantities of material. Professional stucco companies often use large pumps capable of spraying over 8,000 pounds of material per hour. For non-professionals, smaller units are available, consisting of a sprayer with a hopper connected to a compressor that can deliver a significant amount of cubic feet per minute (cfm).
Applying Finish Coats through Spraying
Finish coats of stucco are thinner than base coats, typically between 1/16″ and 1/4″, with most falling in the range of 1/16″ to 1/8″. Sprayers for these materials don’t need to be as robust, and they require less air pressure compared to those used for base coats. Both large professional sprayers and smaller drywall style hoppers can be effective for finish coats, provided they are used with the right materials, nozzles, and air pressure settings.
Utilizing a Drywall Hopper for Stucco
Many people successfully use a drywall texture hopper for spraying stucco finish coats, but not for base coats. A drywall hopper’s capacity is limited and is not suitable for the wetter, heavier material used in stucco base coats. It is best suited for cement-based finish coats with finer sand (20-30 mesh).
Exploring Different Types of Stucco Sprayers
There are various stucco spraying setups available:
- Large Setups: These are substantial units, often as large as a small to medium-sized truck, costing upwards of $10,000. They are typically used by large stucco companies with crews of 10 or more people.
- Smaller Setups: Suitable for professionals with smaller teams, these can handle both base and finish materials. An example is the Imer Small 50, which offers a balance of material output and speed.
- Mortar Sprayers: These are more affordable, ranging from $50 to $350, and are designed for spraying base coat materials. They are smaller and usually require a powerful compressor.
- Drywall Sprayers/Hoppers: Available online and in home improvement stores, these are inexpensive options for spraying cement-based finishes with finer sand, priced between $30 and $60.
Addressing Safety and Professional Recommendations
It is important to recognize the potential risks and limitations of DIY stucco spraying. Spraying base coats, in particular, requires professional training due to the technical skills and safety considerations involved. Inadequate application can lead to structural and aesthetic issues. As such, it is advisable to consult with a professional before attempting to spray stucco, especially for base coats.
Choosing the Right Sprayer and Material
Selecting the appropriate sprayer and material for your specific needs is crucial. Factors to consider include the type of stucco being applied, the scale of the project, and your level of expertise. It’s essential to balance cost, efficiency, and safety when making this decision.
A Starting Point for Spraying Stucco
This article serves as an introductory guide to spraying stucco, providing a basic overview of the process, equipment options, and considerations. While it is a helpful starting point, it should not replace professional expertise and safety precautions. Always prioritize safety and consider consulting with a stucco professional for guidance tailored to your specific project needs.
