Which common cleaning method is recommended for efflorescence removal?

Dry brushing is the recommended method for removing efflorescence due to its effective and gentle approach. Efflorescence consists of mineral salts that form on the surface of masonry when water evaporates, leaving the salts behind. This method involves using a stiff-bristle brush to physically remove the white, powdery deposits without causing damage to the masonry surface or compromising the building material.

In contrast, other cleaning methods may not be suitable for efflorescence removal. For instance, sandblasting can be overly abrasive and may harm the masonry by eroding the surface. Pressure washing, while powerful, runs the risk of driving water deeper into the material, potentially exacerbating the problem by promoting further efflorescence. Using chemical cleaners can sometimes be effective, yet they may not address the underlying moisture issue and could damage the masonry if not used properly. Therefore, dry brushing is often considered the safest and most effective method for this particular cleaning task.