Which type of walls absorb and release water more slowly?

Plaster walls absorb and release water more slowly compared to other wall types because of their dense composition and structure. Plaster is a thick and heavy material, which results in a lower permeability than materials like drywall or brick. This means that when plaster is exposed to moisture, it doesn't allow the water to penetrate and vaporize as quickly as lighter or more porous materials do.

In contrast, drywall is more porous and can absorb moisture quickly, leading to faster evaporation. Concrete walls, while also being dense, can absorb and release moisture more readily than plaster due to their structural properties and the presence of any additives that may increase their porosity. Brick walls, although they can absorb water, tend to have a certain degree of breathability and can release moisture faster than plaster as well.

The nature of plaster's composition—often a mix of gypsum, lime, and water—further contributes to its slow absorption and release capabilities, making it an excellent choice for environments where moisture control is critical. Understanding these different materials and their moisture absorption characteristics is essential in the field of commercial drying, especially when assessing damage and planning effective drying strategies.