Broom finishing is a technique where a broom is used to brush the surface of freshly poured concrete. It creates a textured pattern by dragging the bristles of a broom across the surface while the concrete is still wet. This method is commonly used for sidewalks, driveways, and other flatwork applications to improve the traction and reduce the slipperiness of the surface. Broom finishing also adds decorative appeal and can help conceal imperfections or blemishes on the concrete.
Applying Broom Finish to Set Concrete:
Contrary to popular belief, broom finishing is not limited to only freshly poured concrete. It is entirely possible to apply broom finish to set concrete, although some factors need to be considered.
Surface Preparation:
Before attempting to broom finish the set concrete, the surface must be thoroughly cleaned and free from any debris, dirt, or loose particles. A power washer can be used to remove any loose material or contaminants. This step is crucial to ensure proper adhesion of the broom finish and to achieve a consistent texture.
Water Application:
To create the desired texture, water is typically applied to the surface before broom finishing. This hydrates the concrete, making it easier to brush and manipulate the surface. However, when applying broom finish to set concrete, excessive water must be avoided. Applying a minimal amount of water using a spray bottle or sprinkler can help facilitate the broom finishing process without causing damage or compromising the integrity of the set concrete.
Choosing the Right Broom:
When broom finishing set concrete, it is essential to select the appropriate broom for the job. A stiff-bristle broom, such as a push broom or a concrete finishing brush, is typically recommended. The bristles should be rigid enough to create the desired texture without causing excessive damage or leaving marks on the concrete surface.
Execution of Broom Finish:
To broom finish set concrete, start by dampening the surface lightly without saturating it. Next, take the chosen broom and drag it across the concrete at a consistent angle and direction. It is generally recommended to work in small sections to maintain a uniform texture. Overlapping strokes can create a more visually appealing finish. After completing the broom finish, it is crucial to allow the concrete to dry fully before using or applying any further treatments or coatings.
Benefits and Considerations:
Broom finishing set concrete offers various benefits. It enhances traction and reduces the slipperiness of surfaces, making it a popular choice for outdoor areas and high-traffic locations. Broom finishing can also help hide imperfections and add decorative appeal to plain concrete surfaces. However, certain considerations should be taken into account. Broom finishing may not be suitable for all types of concrete, such as those with decorative aggregate or where a smooth finish is desired. Additionally, excessive force or improper technique during broom finishing can lead to damage or leave unsightly marks on the concrete.Broom finishing is a feasible method to apply to set concrete. With appropriate surface preparation, water application, the right broom selection, and proper execution, one can achieve the desired texture and appearance while enhancing the functionality and aesthetic appeal of the concrete. However, it is essential to consider the specific needs and requirements of the project to determine whether broom finishing is the appropriate choice.