What can porous materials in a siding system, such as brick, do with water?

Porous materials in a siding system, such as brick, have the ability to absorb water and subsequently dry out. This characteristic is significant because it allows these materials to manage moisture, which can be beneficial in preventing water from penetrating the underlying structures of a building. When rain or humidity affects the brick, it may soak in some moisture, but under dry conditions, it typically releases that moisture back into the air. This process helps to regulate humidity levels within the wall assembly and can prevent a buildup of moisture that might lead to mold or rot in less permeable materials.

The ability to absorb and then dry out is crucial for maintaining the integrity of the structure as it promotes a healthier building envelope. This property of porous materials supports their use in construction, as they offer a natural way to deal with moisture rather than allowing water to accumulate and potentially cause damage over time.