Using a concrete trowel involves a combination of technique, balance, and practice to achieve a smooth, professional finish. The short answer is: use it in conjunction with a mag float, employing one hand for balance and to push off while the other hand smooths the concrete.
Here's a more detailed explanation:
Understanding the Tools
Before using a concrete trowel, it's helpful to understand the typical tools involved in the finishing process:
- Mag Float: This tool helps level and consolidate the concrete surface. It is usually used before the trowel.
- Concrete Trowel: Used to create a smooth, dense surface on freshly poured concrete. Trowels come in various sizes and materials.
Basic Troweling Technique
-
Timing is Key: Begin troweling when the concrete surface has lost its sheen but is still plastic. This is crucial for achieving a good finish.
-
Stance and Balance: Good balance is crucial. As the video suggests, use one hand to provide support and to push off. This ensures stability as you work across the concrete surface.
-
Float First (Optional but Recommended): After the concrete has been poured and screeded, use a magnesium float (mag float) to level any imperfections and bring paste to the surface.
-
Initial Troweling: Hold the trowel with a slight angle and use long, overlapping strokes across the surface. Apply moderate pressure. The goal is to flatten any remaining imperfections and begin smoothing the concrete.
-
Successive Troweling Passes: As the concrete stiffens, make subsequent passes with the trowel. Gradually increase the angle of the trowel and apply more pressure with each pass. These later passes are what create the final smooth, hard surface.
-
Edging: Use an edging tool to create smooth, rounded edges along the perimeter of the concrete slab.
Tips for Success
- Keep the Trowel Clean: Regularly clean the trowel blade with water to prevent concrete buildup.
- Avoid Digging In: Don't apply too much pressure in one area, as this can leave marks.
- Overlap Strokes: Overlapping each stroke prevents lines and inconsistencies in the finish.
- Practice: Consistent, smooth finishes take practice. Start with a small area to get a feel for the trowel.
- Consider Power Trowels: For larger slabs, consider using a power trowel to speed up the finishing process and ensure a uniform finish.
By following these steps and practicing proper technique, you can effectively use a concrete trowel to achieve a professional-looking concrete finish.
