HIP Mould is the only mould remediation company using best practices in building science + health and environmental safety + mycotoxicology Not all mould that appears black or dark is of the deadly variety. There are four varieties of mould that are found in homes: one is deadly; the other three will only create an allergic or respiratory reaction in humans (depending on their tolerance / respiratory health, of course). It is quite easy to rule out the deadly variety and allay fears that fleeing one's home is necessary. Deadly mould (Stachybotrys) has received a good deal of media attention of late;