Which types of surfaces are typically more challenging to clean after mold exposure?

Surfaces that are classified as porous materials are typically more challenging to clean after mold exposure due to their structural characteristics. Porous materials, such as wood, drywall, and fabric, have numerous tiny openings or pores that can absorb moisture and organic matter. When mold spores land on these surfaces, they can penetrate deeply into the pores, making it difficult to fully remove them by merely wiping the surface.

Cleaning porous materials often requires specialized methods, such as thoroughly scrubbing or even replacing the affected materials if the infestation is severe. In contrast, non-porous surfaces, like glass and metal, do not retain moisture or organic material in the same way, allowing for more effective cleaning with simpler techniques. Semi-porous surfaces may present moderate challenges depending on their composition, but still tend to be easier to clean than deeply porous surfaces. Thus, the inherent absorption capability of porous materials is what makes them particularly problematic when addressing mold contamination.