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Asbestos test results explained

A laboratory result is short, but it matters. This guide explains what it says and what your options are.

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Laboratory result sheet on a desk

What a result contains

For each sample: a reference, a description of the material, whether asbestos was detected and which type. It will also say what was not found. Keep the result with your house records.

If it is negative

It means that sample did not contain asbestos. It does not say anything about other materials in the building. You can plan the job around that material, but other materials still need their own results.

If it is positive

  • Do not drill, sand, scrape or break the material.
  • Tell anyone who may work on it.
  • Decide whether to leave it, seal it, overboard it or have it removed.
  • Ask a contractor to advise on the route that suits the material and its condition.

Reading types

Asbestos is described by type, for example chrysotile (white), amosite (brown) and crocidolite (blue). The type affects how the material is treated, but all types should be handled with care.

This guide is general information. It is not a survey and cannot confirm the presence or absence of asbestos in your building.

Quick answers.

Does positive mean I must remove it?

Not necessarily. Sound material can often be managed in place.

How long should I keep the result?

Keep it with your house records and pass it to future buyers and builders.

Can I challenge a result?

If you doubt it, you can ask the contractor about a second sample or re-analysis.

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