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Mold Contamination of Residential Buildings

3009-600 moisissures

Standard BNQ 3009-600
Mold Contamination of Residential Buildings – Contamination Assessment and Building Rehabilitation

Mold spores are present everywhere, both outdoors and inside buildings. They grow when appropriate conditions are met: the presence of organic matter and water, and an adequate temperature. Mold proliferates when humidity levels are high. In a building environment they can damage materials, lower indoor air quality, and adversely affect human health depending on the extent of their growth, the duration of exposure, and the exposed individual’s health status. 

The new BNQ 3009-600 standard provides a framework for the proper inspection, diagnosis, and decontamination of mold growth in residential buildings. This content of this standard is the product of the deliberation and consensus reached by a balanced standardization committee representing stakeholders.

In order to guide people in their approach towards problems pertaining to mold, the BNQ has prepared a list of resources under the “Guidance related to mold” tab. Please note, however, that the BNQ is a standards development organization and does not provide services, advice or expertise in the field of mold, buildings or health.

A program for the recognition of training related to the standard will come into effect in May 2021. For further details, please click on the Recognition of Training (under development) tab.

Download standard

12795FRNBNQ 3009-600 Contamination des habitations par les moisissures - Investigation et réhabilitation du bâtiment
Version Language Publication date Edition Updated on No. of pages Price

Guidance related to mold (French only)

Financial contributors

The development of the standard and its free availability were made possible thanks to the financial support of the following organizations:

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Standards Committee Members

Number of committee members: 18
Mr. Jérôme AlexandreVille de Québec
Mr. Gabriel Bélanger S.Institut de la qualité de l'air du Québec (IQAQ)
Ms. Madeleine BélisleAssociation des consommateurs pour la qualité dans la construction
Ms. Laurence Côté-LeclercSociété d'habitation du Québec (SHQ)
Ms. Marie-Pier GermainAssociation des professionnels de la construction et de l'habitation du Québec (APCHQ)
Mr. Eddy HunterVille de Montréal
Mr. Jean-François LafrenièreAssociation des microbiologistes du Québec
Mr. Jacques LalibertéCAA-Québec
Ms. Caroline LapointeIngénieure en structure
Mr. Claude LatulippeLes expertises Latulippe & Associés
Mr. Jean-Marc LeclercInstitut national de santé publique du Québec
Mr. Michel LegrisHygiéniste du travail
Mr. Pierre LongpréAssociation de la construction du Québec (ACQ)
Ms. Geneviève MarchandInstitut de recherche Robert-Sauvé en santé et en sécurité du travail (IRSST)
Mr. Daniel PellerinPhoenix Disaster Restoration
Ms. Rymisma RaouiRégie du bâtiment du Québec (RBQ)
Mr. Richard TrempeOrdre des architectes du Québec (OAQ)
Ms. Marie-Alix d'HalewynMicrobiologiste, épidémiologiste terrain

Recognition of Training (under development)

A document on the recognition of training related to the standard BNQ 3009-600 is currently under development by the BNQ with the help of a representative committee of people working in the field. The recognition program is expected to come into effect in May 2021.

The document will contain the recognition rules and also the requirements that must be respected by any instructor or training institute wishing to offer training recognized by the BNQ. The BNQ will also establish the processes and tools necessary for its administration of the recognition program.

The recognition document will be available for download free of charge from the website of the BNQ (in French). Instructors or training institutes wishing to have their training on the standard BNQ 3009-600 recognized by the BNQ will be invited to apply to the designated person in charge from the BNQ’s Certification team. The list of recognized training programs will be available on the website of the BNQ.

If you would like to be notified of the launching of the public consultation on the development of the document and its publication, please subscribe to the BNQ newsletter or write to This email address is being protected from spambots. You need JavaScript enabled to view it. asking to be notified.

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