A good mold assessment report sample shows the whole chain: where the water came from, what it damaged, how you measured it, what the lab found against the outdoor control, which IICRC S520 condition each area is in, and what has to happen next, with a signed certification at the end. Open the 44-page sample assessment (PDF) and read it alongside this page; each section below gives the page numbers from its footer.
The sample comes from a demonstration job: a fictional firm, Delaware Valley Environmental, assessing an attic HVAC condensate overflow at a two-story house in Media, Pennsylvania. MoldMind drafted it from the job's photos, notes, meter readings and lab PDF; it is the same format a customer's report takes. The file is 44 pages because the body runs to 40 and the lab's certificate and the chain of custody are appended after it.
What goes in the executive summary? (page 3)
The finding, its cause and the evidence, in one paragraph. The sample names the organisms and the affected areas, then traces the overflow path from the secondary condensate pan through the platform decking, insulation and ceiling into the Bedroom 3 wall cavity. It gives the headline numbers (the attic air sample at 23 times the outdoor control for Aspergillus/Penicillium-like organisms, decking at 26.4% MC) and the deficiency behind them: a capped secondary drain and no float shutoff, already noted in an earlier pre-purchase inspection.
What to copy: a reader who stops after this page should know what is wrong, where, why, and how sure you are. Anything that is not supported later in the report does not belong here.
Why separate scope of work, property description and conditions? (pages 5–7)
Because each answers a different challenge. The scope of work records who asked for the assessment and why, so nobody can later claim you assessed the wrong thing. The property description fixes the building (construction year, foundation, cladding, HVAC location) that the findings refer to. Environmental conditions record temperature, relative humidity and dew point indoors and at the outdoor baseline, and the sample notes the prior night's rain — the kind of fact that changes how an outdoor control reads.
The sample also names the ASHRAE climate zone (4A, mixed-humid) as context for the season. That is context, not a pass/fail standard; see ASHRAE climate zones and moisture.
How should per-area findings be written? (pages 8–25)
One section per area, each in the same order: what the area is, what you observed, the photographs, the moisture readings, the concerns, and the IICRC S520 condition. In the sample the attic and Bedroom 3 carry the damage, while the hallway, primary bedroom, living room, basement and exterior are documented too. A report that only describes the bad rooms invites the question of whether you looked at the rest.
Two habits worth copying:
- Every photo has a caption that says what it shows and why it matters, not "Photo 12". The pin-meter photo on page 11 is captioned with the substrate, the location and the reading.
- The condition is stated per area with its extent, for example "Equipment platform, decking and joist bays 2–4 — Condition 3" on page 12. Where a fact could not be established, the sample says so: the onset of the Bedroom 3 wall damage "could not be dated from available physical evidence" (page 17).
For the condition definitions themselves, see Condition 1, 2 and 3.
What belongs in the moisture survey? (pages 26–27)
The method before the numbers. The sample states which meter was used on which material: a pin meter on solid wood, reported as % MC, and a pinless meter on painted gypsum and carpet pad, reported only as elevated or dry relative to a same-material reference, because a wood-scale reading on a non-wood material is comparative only. It names the dry-standard reference (a north gable rafter tie at 9.8% MC), which follows the IICRC S500 comparative approach (IICRC, S500).
It also explains its status bands (normal, elevated, saturated) as the fixed bands used in this assessment, not as thresholds from a standard. That one sentence heads off a cross-examination question. See pin vs pinless moisture meters for the method behind it.
How should lab results be presented? (pages 28–31)
As a table, then an interpretation against the outdoor control. The sample lists each air sample with location, volume, flow rate, method (spore trap analysis by optical microscopy per ASTM D7391) and cassette type (ASTM, D7391). The interpretation reads every indoor sample against the same-day outdoor control, using the comparative approach in the AIHA's indoor mold guidance (AIHA, Recognition, Evaluation, and Control of Indoor Mold): the living room and primary bedroom came back within outdoor range; Bedroom 3 and the attic did not.
The tape-lift result is reported semi-quantitatively (heavy 4+, moderate 3+) and the sample says outright that surface results are not spore counts per cubic meter and are not comparable to the air samples. See how to read a lab report and interpreting indoor/outdoor ratios.
What do conclusions and recommendations need? (pages 32–34)
Quantities, priorities and the open questions. The sample lists each affected area with an estimated square footage (about 150 sq ft in all), states that the source "cannot be considered controlled" until the capped drain and missing float switch are corrected, and labels each recommendation by priority (prompt, short-term, long-term). The hallway, whose condition the recorded data could not establish, is flagged for investigation instead of being given a guessed condition. The section closes by telling the owner to hand the contractor the assessment, the affected-area plan and the lab report, followed by a Standards Referenced list that says what each standard was used for. Remediation keyed to the moisture source and the documented extent is the EPA's framing too (EPA, Mold Remediation in Schools and Commercial Buildings). The remediation protocol template shows how those recommendations become a scope of work, and the 30-page sample protocol is the same job's protocol.
Why end with limitations, certification and appendices? (pages 35–40)
Limitations say what was not inspected or not accessible, which is where a claim against an assessor usually starts. The inspector certification (page 36) is a signed statement that the report is the assessor's professional opinion, dated, with credentials. The appendices carry the complete photographic record and the lab's own report, so every number in the body can be traced to its source.
Want your own reports in this shape? Try MoldMind free — 3 jobs, no card. For a fill-in version, use the mold inspection report template; for the return visit, the 38-page sample clearance and the clearance report template.
Sources
- IICRC S520 and S500 Standards (opens in a new tab)
- ASTM D7391, Standard Test Method for Categorization and Quantification of Airborne Fungal Structures by Optical Microscopy (opens in a new tab)
- AIHA, Recognition, Evaluation, and Control of Indoor Mold (opens in a new tab)
- EPA, Mold Remediation in Schools and Commercial Buildings (opens in a new tab)