Independent indoor air quality assessors · Since 1999
Mould and Microbial Assessment for Commercial Buildings
Mould indicates a moisture condition needing investigation. We assess visible growth, hidden contamination and conditions after remedial work. Our findings are independent of remediation contractors.
Established 1999 · 2,500+ assessments · SafeContractor approved · BOHS Affiliate Member · London & South East
Our Mould and Microbial Assessment for Commercial Buildings Services
Office Mould Investigation
Inspection, moisture mapping and targeted sampling to define cause, extent and a contractor-ready remedial scope.
Learn morePost-Remediation Verification
Independent visual, moisture and sampling checks after mould remediation has been completed.
Learn moreIAQ Microbial Assessment
Airborne and surface assessment of fungi and bacteria, including relevant HVAC components.
Learn moreFungal Spore Testing
Question-led air sampling with indoor and outdoor comparison and clear sampling limitations.
Learn moreDamp and Mould Air Quality Testing
Moisture investigation and indoor air assessment after leaks, floods or recurring condensation.
Learn moreCommercial teams we support
Why This Matters
A leak, rain penetration, cold-surface condensation, residual flood moisture or an affected HVAC component requires a different response. Investigation before treatment directs resources towards the source, defines the area requiring attention and creates a baseline for verification.
- Leaks can wet concealed finishes before staining appears
- Condensation can recur on cold surfaces
- Flooding may affect concealed construction
- HVAC water systems can support microbial growth
Our Approach
We review the history, inspect affected materials and trace likely moisture pathways. Measurements and samples are selected only where they can test a defined question. The report separates observations, probable causes and uncertainty, then prioritises actions for the appropriate contractor.
Choose the route that matches your question
Each service supports a different decision. Starting with the right route avoids broad sampling when inspection or verification is the real requirement.
| If you need to… | Page |
|---|---|
| Find the cause and extent of visible or suspected growth | Office Mould Investigation |
| Check a treated area independently after remediation | Post-Remediation Verification |
| Assess airborne and surface bacteria and fungi | IAQ Microbial Assessment |
| Decide whether fungal spore sampling will answer a question | Fungal Spore Testing |
| Investigate damp, condensation or post-flood indoor air concerns | Damp and Mould Air Quality Testing |
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Commercial moisture sources
Roof, façade and plumbing defects may be intermittent, while cold surfaces can collect condensation. Flood water can remain within concealed construction after surfaces appear dry. Basements add below-ground fabric and restricted air movement. We follow the moisture history rather than assuming one cause.
From evidence to action
The report maps affected locations and distinguishes repair, drying, removal, cleaning and HVAC attention. It gives contractors a reasoned scope and clients an independent basis for verification.
Is this the right page?
Use this hub when you are choosing a mould or microbial assessment. For a specific visible or suspected problem, start with Office Mould Investigation. For broader chemical, particulate, comfort or ventilation questions without a moisture-led concern, use Indoor Air Quality Testing.
Limitations and what this assessment cannot tell you
A mould survey records accessible evidence within the agreed areas and operating conditions.
- Concealed cavities cannot be characterised without suitable access or intrusive work by others
- A spot sample represents its location and sampling period, not every condition in the building
- Species identification alone does not establish the moisture source or health effect
- Building repairs, drying and remediation are undertaken by appointed contractors
- Verification is a separate stage after the agreed work and cleaning are complete
What the mould assessment report includes
- Building history, complaint question and agreed scope
- Affected-area map and photographic condition record
- Moisture, temperature and humidity evidence
- Sampling methods and laboratory results where commissioned
- Cause assessment with confidence and limitations
- Prioritised repair, remediation and verification actions
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Frequently Asked Questions
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