Background: Indoor air quality and water damaged buildings are increasingly a focus of civil litigation and public health concern. This paper reviews the science and practice of dealing with damp and mould in the built environment. The focus is on education for solicitors, barristers and arbitrators, builders and building consultants, architects, engineers and real estate personnel who have a common interest in dispute resolution within the property law space. In Australia, there is currently no consistent consensus regarding how and what to measure when buildings get wet or there are adverse health claims. Possible reasons include commercial self-interest from groups within the remediation industry and uneven response to claims from the insurance, residential and commercial tenancy or landlord and building sectors due to a lack of policy or professional conduct guidelines. Ignorance of basic biology and infection control are also salient factors. In the absence of defined expectations and thresholds for both the assessment and remediation stages, the occupant may be left inside a building that remains contaminated or where inappropriate resources have been applied or misapplied without justification or based on flawed reasoning. This could result in liability for key stakeholders or result in disproportionate allocation of funds that could create an unequal public health care response. The recent announcement of the Inquiry into Biotoxin-related Illnesses in Australia is likely to shine a spotlight on the need for objective evidence collection and analysis during all stages of decisionmaking about human exposure and remediation of fungi within diverse building structures. To illustrate, I review the AustLII database of the Victorian Civil and Administrative Tribunal between 1998-2018 for all cases about mould. Both the number and frequency of cases is trending up with a dominance of disputes within residential tenancy at 50%, followed by 31% for building. These results reveal issues concerning minimum housing standards and difficulties dealing with unexpected outcomes caused by newer building practices as well as dispute over contract terms, costs or health status. Compliance principles are suggested with reference to key citation and consensus methods or documents that can be used to improve the assessment and practical cleanup of indoor water damage.