Building Forensics expands free app to guide mould testing decisions

Building Forensics has expanded its free TRACE app to help homeowners, tenants and professionals choose the right mould and bacteria testing approach before spending money on sampling. The update adds research pathways and decision support for symptoms, water damage, remediation and other contamination concerns.

Why it matters: - Homeowners and tenants often face a confusing mix of air tests, surface swabs, dust analysis and microbial DNA methods. - Choosing the wrong test can waste money and leave key contamination questions unanswered. - The app is designed to make testing decisions clearer before anyone orders sampling or lab work.

What happened: - Environmental hygienist Jeff Charlton and Building Forensics expanded the free TRACE application. - The app reviews home conditions, occupant concerns and possible contamination issues before suggesting sampling and analysis pathways. - TRACE is available through the Building Forensics application collection: More information - Supporting guidance is also linked from the US Environmental Protection Agency’s Mold Testing or Sampling page and the CDC/NIOSH Mold, Testing and Remediation page.

The details: - TRACE starts with the user’s concern, not the test they think they need. - The app considers dampness, condensation, leaks, previous water damage, visible or concealed mould, odours and indoor ventilation conditions. - It also looks at sewage or bacterial contamination concerns, prior cleaning or remediation, continuing concerns after remedial work, reported physical symptoms and whether those symptoms change between environments. - Pets, animal bedding, houseplants and other possible microbial reservoirs are included in the review. - The app then points users toward potentially suitable sampling methods, analytical options and sample locations. - TRACE explains the strengths and limits of air sampling, surface swabs, tape lifts, settled-dust analysis, microbial DNA testing and related methods. - The app is meant to help users avoid buying a test that cannot answer the main question, compare methods and prepare better questions for laboratories, surveyors and remediation contractors. - TRACE also helps users decide when professional investigation is more appropriate than DIY testing. - The application does not present any single test as the answer for every situation. - The app provides environmental decision-support information and does not diagnose illness, prescribe treatment or prove that a building caused symptoms. - Medical assessment and interpretation remain the responsibility of qualified healthcare professionals. - TRACE may also help with post-remediation verification by clarifying what clearance testing needs to answer and which areas may need assessment. - The application highlights the limits of relying on one method alone. - The EPA says sampling is generally unnecessary where visible mould is present and says no federal limits have been established for mould or mould spores. - NIOSH warns that short-duration air samples may not represent actual exposure and do not capture the full range of agents associated with damp buildings. - TRACE draws on Jeff Charlton’s more than three decades of environmental investigation and contamination experience.

Between the lines: - The update reflects a shift away from test-first thinking toward question-first investigation. - The research-support pathways appear aimed at cases where property testing alone may not resolve the issue, especially when symptoms, exposure timing or non-building reservoirs are part of the picture. - The app’s framing suggests a practical middle ground between DIY testing and full professional investigation.

What’s next: - Users can use the updated app to narrow down sampling choices before contacting laboratories or contractors. - Participating professionals can use the research pathways when conventional property testing does not fully answer the question. - The app may be especially useful after water damage or remediation, when verification depends on choosing the right assessment method.

The bottom line: - TRACE is built to help people ask better testing questions first, so they spend less on the wrong mould test and get results that are actually useful.