How often should concrete masonry blocks be wet before installation?

For the installation of concrete masonry blocks, it is important to understand the conditions that affect the bonding and overall integrity of the masonry work. The correct answer emphasizes that concrete masonry units should not be wet before installation, as excess moisture can hinder the setting and bonding process of the mortar.

When you wet the blocks prior to installation, it can prevent the mortar from adhering properly, leading to weaker bonds and potential structural issues once the wall is completed. The moisture in the blocks can absorb water from the mortar, impeding its ability to set effectively. This principle underlines the necessity for dry conditions as optimal for achieving strong adhesion between the mortar and the blocks.

In practice, it's essential to maintain a balance with moisture. While it might sometimes be discussed to wet blocks under specific circumstances, such as in very high-temperature environments where the blocks might absorb moisture too quickly, this does not apply as a standard procedure for all installations. Understanding the context and specific conditions of your project informs best practices for masonry installation, reinforcing the guideline that blocks should generally be installed dry.