In what situation is grouting particularly important?

Grouting is particularly important when constructing hollow block walls because it serves several critical functions that enhance the structural integrity and performance of the wall. Hollow blocks are designed with spaces or voids that can be filled with grout, which not only adds strength but also helps to bond the blocks together, creating a unified structure. This bonding is essential for the stability of walls that may bear loads, as it reduces the risk of cracking or shifting.

Moreover, the grout fills the voids in the blocks, which significantly contributes to their overall strength and load-bearing capacity. In addition to structural benefits, grouting also helps prevent the intrusion of water and provides added resistance against environmental factors, thus improving the durability of the wall. These functionalities make grouting a crucial step in the construction of hollow block walls, directly impacting the overall safety and longevity of the structure.