Alcohol, hydrogen peroxide, vinegar, baking soda and bleach compared: when you may remove small patches of mould yourself, how to protect yourself while you do it, why painting over achieves nothing and when a measurement is more useful than another round of scrubbing.

Spots, musty smells, condensation and irritated airways: which signs point to mould, who is more sensitive, what “black mould” really means and when an air sample gives you a clear answer.

What tenants and property managers in Germany should do when mould appears: report it correctly, document it, understand rent reduction and its risks – and know what a lab report proves and what only an expert can settle.

From registration to report: how your AirTrap air sample is posted, scanned and analysed with AI assistance in the lab, how long it takes, what the report contains and what the analysis costs.

Settle plates, quick tests or an air sample with lab analysis: what each route actually answers, where DIY tests go wrong, what they cost – and when only a lab result will do.

Spores/m³ from a total spore count or CFU/m³ from culture: how the two lab methods work, where their strengths and limits lie, what the German UBA guideline and ISO 16000 say – and which method fits which question.

What the 2024 edition of the German UBA mould guideline changes and what it asks of measurement strategy, air sampling, outdoor reference, assessment to Table 10 and documentation – condensed for surveyors, building biologists and remediators, with an honest look at what the AirTrap system covers.

When a clearance test is needed, what state the room has to be in, how many air samples to take, how the results are assessed and what belongs in the record – step by step for remediation contractors and site managers.

Results page, data table, trace images: what each part of the AirTrap lab report means, how the indoor–outdoor comparison works and what to do with the result.