Which surfaces can typically be cleaned after mold exposure?

The correct choice is semi-porous materials because these surfaces, such as wood, drywall, and concrete, can be effectively cleaned and remediated after mold exposure with appropriate methods. When mold colonizes semi-porous materials, it can penetrate somewhat but doesn’t embed as deeply as in porous materials like fabrics or carpets, which are prone to holding mold spores and may require replacement rather than cleaning.

Cleaning semi-porous surfaces typically involves using cleaning solutions or fungicides that can effectively remove mold without causing significant damage to the underlying material. This remediation process can include scrubbing, sanding, or using specialized techniques to ensure that the mold is removed.

Porous materials often hold mold spores more deeply and can be much more difficult to clean effectively; usually, these items are discarded. While it might seem like 'all surfaces' could be cleaned, not every type of surface is practical or effective to remediate after a mold incident, especially with porous materials requiring different handling based on their susceptibility to mold. As for the option of no surfaces, this does not apply since cleaning can be performed on certain types of materials, particularly semi-porous ones.