What happens when water moves through masonry?

When water moves through masonry, one significant consequence is that it can lead to efflorescence. Efflorescence occurs when water infiltrates the masonry, dissolving soluble salts that are present in the material. As the water evaporates, it leaves behind these salts on the surface, resulting in white, powdery deposits known as efflorescence.

This phenomenon is important because while efflorescence itself may not directly damage the masonry, it can indicate underlying moisture issues that could lead to more serious problems. For instance, prolonged moisture exposure can weaken the masonry structure, lead to mold growth, and cause more extensive deterioration if not addressed.

The other options relate to different effects or concepts. Strengthening the structure or improving ventilation does not occur as a result of water moving through masonry. Instead, moisture generally poses risks. While rusting can be a concern in metal components adjacent to masonry, it is not a direct effect of water moving through the masonry itself. Thus, efflorescence is the most accurate outcome related to the movement of water through masonry.