To whitewash brick using mortar, you can employ a modern technique known as the "German smear," which creates a distinctive, aged look by applying a thinned mortar mixture.
Understanding the German Smear Technique
The German smear method provides a durable whitewashed effect on brick by using a mixture of mortar and water. This technique differs from traditional paint-based whitewashing as it uses a cementitious material that physically adheres to the brick and mortar joints, offering unique texture and character.
Preparing the Mortar Mixture
According to the reference, a key aspect of the German smear is the specific ratio of materials used to create the application mixture.
- Ratio: The mixture consists of 70 percent mortar and 30 percent water.
- Consistency: This ratio results in a thicker consistency compared to paint-based whitewashes, which is crucial for the application and texturing process.
Application Process
Applying the German smear mixture involves both application and removal steps to achieve the desired finish.
- Mix the Mortar: Combine 70 percent mortar with 30 percent water in a suitable container and mix thoroughly until a consistent, thick mixture is achieved.
- Apply the Mixture: Use a trowel or grout sponge to apply the thicker mixture directly onto the brick surface, including the mortar joints. Ensure good coverage based on the desired final look.
- Remove Excess: Immediately or shortly after application (depending on how quickly the mixture starts to set), remove enough of the applied mortar to leave a thin coating on the brick and in the joints. This removal step is critical for creating the whitewashed effect, allowing some of the original brick color and texture to show through while the mortar mixture remains in the recesses and provides the smeared, aged appearance. The amount removed dictates the final look, from heavily covered to lightly coated.
This process allows for variation, giving each project a unique, hand-crafted appearance. The result is a textured, weathered look that highlights the brick's natural form while softening its color with the mortar overlay.
