The higher absorption limits allowed by the ASTM C90 standard for lower density units do not necessarily correlate with lower resistance to water penetration. One of the reasons is that resistance to water penetration is known to be greatly affected by labor and depends on the details for water management. It is generally recognized that these two factors have a greater influence on the wall's resistance to water penetration than other factors, such as the density of the units.
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Discover the top reasons why masonry retaining walls are a popular choice for landscaping projects. From durability to visual appeal, learn why these walls are a worthwhile investment.
The five masonry challenges we see most often in existing buildings are brick demolition, mortar decay, sandstone erosion, algae growth, and efflorescence. Typical stone walls don't allow leaks, but modern concrete masonry units (CMU) are more porous.