Every guide is written by a sector expert from real experience in the field — working notes from a New Zealand mould analysis laboratory, drawn from the samples, reports and inspections that cross our benches, not rephrased from someone else's article.

Together they explain what a mould test actually measures, what your report is telling you, and what the genera we identify mean for a building and the people inside it. The library runs in three threads: laboratory insights — how we identify and quantify mould under the microscope, and how to read the result; health and exposure — what specific genera and mycotoxins mean for occupants; and property and remediation — what a mould assessment uncovers that a standard inspection misses, and why surface cleanup so often fails.

If something here raises a question about your own place, the team that writes these guides is the same one that analyses your samples. Start with the genus guide below, or send a sample to our lab.

Mould sample under microscope at Scaada NZ

Laboratory Insights

Understanding Different Types of Mould — A New Zealand Laboratory Genus Guide

A laboratory guide to the common indoor mould genera in New Zealand — Aspergillus, Penicillium, Cladosporium, Stachybotrys and more — with Scaada NZ microscopy of each genus...

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A calibrated spore trap collecting an indoor air sample in a modern New Zealand interior

Laboratory Observations · New Zealand

From the Field: What 3,000+ Spore Traps Tell Us About New Zealand Buildings

Field observations from a New Zealand mould laboratory — the hidden mould crisis in modern airtight homes, Dry Standard failures in new builds, and what trans-Tasman patterns tell us about NZ buildings specifically...

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Extract from a Scaada NZ mould test report showing an IICRC S520 condition rating

Laboratory Insights · Report Interpretation

How to Read Your Mould Test Report — A Lab's Guide to IICRC S520 Conditions

A walk-through of a real Scaada NZ test report — what Fs/cm² means, the indoor-vs-outdoor reference comparison, and what each IICRC S520 condition rating (1, 2, 3) requires...

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Mould bleeding through painted-over skirting at a Scaada NZ inspection site

Laboratory Insights · Remediation

Why Bleach (and Vinegar) Don't Kill Mould — What We See in Lab Samples After DIY Cleanup

Lab evidence on why surface treatment with bleach or vinegar fails: mould returns from within porous materials within weeks, often worse than before. Includes when (and how) to engage an IICRC-certified remediator...

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Mould growth on subfloor timbers in a New Zealand residential property

Property Transactions · Mould Assessment

What Mould Assessments Reveal That Property Inspections Miss

Real case studies: subfloor timber decay, efflorescence from a failed membrane, concealed water damage beneath carpets — and the hidden sources a building inspector won't find...

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Aspergillus spores down scaada microscope - Aspergilliosis

Health & Safety Insights

Mould Exposure and Health: What You Need to Know

Biological pollutants, including mould, amplify in the built environment where there is poor ventilation or water ingress...

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