In masonry, what effect does moisture intrusion have on structures?

Moisture intrusion in masonry can have significant detrimental effects on structures, making the response highlighting the potential for efflorescence and structural damage the most accurate. When moisture penetrates masonry walls, it can dissolve soluble salts present in the materials. As the moisture evaporates, these salts are left behind on the surface, resulting in a white, powdery residue known as efflorescence. This not only affects the aesthetic appearance but can also indicate underlying moisture problems that may lead to more severe issues.

Furthermore, continuous moisture exposure can weaken the structural integrity of the masonry. It can cause materials to expand and contract, leading to cracking, spalling, and other forms of deterioration that compromise the stability and longevity of the structure. Therefore, understanding the implications of moisture intrusion is critical for maintaining the health of masonry work.