Cost and turnaround time

Cost including inspection and complete report by a scientist, one air test per floor as well as surface tests

  • Single-floor apartment ± $840
  • Bungalow or two-floor apartment ± $1 020
  • Cottage or three-floor apartment ± $1 200

Turnaround time

  • Verbal results in 5 to 7 business days

Questions? Appointment?

You can call us at 514 990-2063 or fill out the form below and we will contact you as soon as possible.

Test quality and credibility

The laboratory participates in the EMPAT program of the American Industrial Hygiene Association (AIHA). EMPAT is a performance evaluation program for environmental microbiology laboratories in accordance with the base requirements of organizations such as Health Canada and the Institut national de santé publique du Québec (INSPQ). Multitest as well as the laboratory are covered by errors and omissions liability insurance.

What is it?

Mold and spores (which is how mold reproduces—similar to the role that pollen plays for flowers) are a health hazard. Testing thus consists in checking for contamination and suggesting corrective measures, if necessary. Inspection, air tests and surface tests, which last 2 to 3 hours, are carried out by a chemist or a microbiologist (university-level science training that enhances the report’s credibility) and is followed by a complete report by this expert with recommendations for decontamination work, if required.

Learn more about our mold tests

What is mold?

Mold is comprised of microscopic fungi that can grow on almost any type of surface. Mold often appears as a stain or a mark and may have a moldy or damp earth smell.

In order to grow, mold requires moisture and a suitable medium—usually cellulose-based materials (cardboard, gypsum or wood) as the fungi feed on the organic compounds contained in these materials. Mold can also grow on plastic, metal or other materials such as concrete in the right environment (the presence of dust and high humidity are often enough). Mold may even be found on plants and food.

To reproduce, mold releases tiny spores into the air (400 to 2,000 times smaller than a hair) that can enter mucous membranes (mouth, lungs, eyes, etc.) and cause health problems.

What does mold testing involve?

It consists of a visual inspection performed by a chemist or a microbiologist (university-level science training that enhances the report’s credibility) to look for visible fungal growths or excessive humidity. Humidity levels of indoor air and certain building materials are measured using a hygrometer, an electronic tool that is non-intrusive (as it does not damage materials).

In addition, at least two air tests will be performed: one outside (weather permitting) to serve as a reference (baseline) value to compare with the results of the air test(s) taken inside the building (at least one test per floor). The number of spores in the building should ideally be lower than, but at most equal to the number of spores outside.

Finally, at least two surface tests (also called tape tests or swabs) will be done. This type of test is particularly useful since certain types of molds sometimes emit very few spores, making it difficult to interpret the results using air tests.

It is important to note that an air test is only valid for one floor (sometimes less than one floor). The expert may recommend an additional air or surface test, which will represent an additional cost.

Health risks

According to Health Canada, excessive humidity and mold may aggravate the following conditions:

  • Eye, nose and throat irritation;
  • Coughing and phlegm;
  • Wheezing and shortness of breath;
  • Asthma symptoms;
  • Allergic reactions.

Reactions to mold depend on the degree of exposure and people’s general health. Certain people are more vulnerable, such as children, senior citizens and people who have a weakened immune system or other health issues such as asthma, acute allergies or other respiratory illnesses.

Useful information

  • As specified by Health Canada, the recommended humidity level for your home is around 50% in summer and 30% in winter; using a dehumidifier may be necessary.
  • Spraying a water/bleach solution is not the ideal solution for cleaning mold.
  • Cleaning visible mold off a wall will not solve the problem.
  • A mold test is strongly recommended after performing decontamination or renovation work involving materials affected by mold.
  • Always wear a half-mask respirator with P100 (HEPA) filters when handling material that has been affected by mold.

FAQ on mold air testing

What is a mold test including an air quality test?

It consists of a visual inspection performed by a chemist or a microbiologist (university-level science training that enhances the report’s credibility) to look for visible fungal growths or excessive humidity. Humidity levels of indoor air and certain building materials are measured using a hygrometer, an electronic tool that is non-intrusive (as it does not damage materials).

In addition, at least two air tests will be performed: one outside (weather permitting) to serve as a reference (baseline) value to compare with the results of the air test(s) taken inside the building (at least one test per floor). The number of spores in the building should ideally be lower than, but at most equal to the number of spores outside.

Finally, at least two surface tests (also called tape tests or swabs) will be done. This type of test is particularly useful since certain types of molds sometimes emit very few spores, making it difficult to interpret the results using air tests.

It is important to note that an air test is only valid for one floor (sometimes less than one floor). The expert may recommend an additional air or surface test, which will represent an additional cost.

Can i choose a testing time?

No. Our expert will contact you to schedule the appointment.

How long will your expert be on site?

Approximately 2 hours.

If it is contaminated, is it dangerous for my health?

According to Health Canada, excessive humidity and mold may aggravate the following conditions:

  • Eye, nose and throat irritation;
  • Coughing and phlegm;
  • Wheezing and shortness of breath;
  • Asthma symptoms;
  • Allergic reactions.

Reactions to mold depend on the degree of exposure and people’s general health. Certain people are more vulnerable, such as children, senior citizens and people who have a weakened immune system or other health issues such as asthma, acute allergies or other respiratory illnesses.

Do you carry out remediation work if the test result is positive?

We do not perform this type of work. However, we can refer you to contractors if necessary.

Some testimonials from our clients

“Quick availability for our tests, competent and rigorous professionals, clear reports… what more could you ask for. We do business with Multitest regularly and are very satisfied, thanks to all your team :)”

Martin Forgues, partner │ Aire D3 inc. – decontamination services

“I highly recommend Multitest. They took the time to give me good advice as I dealt with a delicate situation. I felt supported and 100% confident with this team. Rigor, efficiency in communications, respect for the estimate. A great experience.”

Daphné Caron, Google review, Greater Montréal

“I wouldn’t have enough words to tell you what a great experience doing business with a gang who have fun with the customer and are very attentive. Fast and unparalleled service without complications. They return the calls to you and explain how they do it and you don’t talk to a machine; this is greatly appreciated. Well done to your team and keep up the good service to your customers, this is the recipe for success. You can count on me to do propaganda for your business, well done!”

Daniel Therrien, Google review, Greater Montréal

“Thank you for taking the time to explain to me, for your wise advice and your references for corrective work!”

Caroline Gauthier, Google review, Greater Montréal

“Great service from Mr. Forest. Multitest took the time to answer my questions and provide relevant information for the good of our organization. Impeccable!”

Patricia Dubois, Google review, Greater Montréal

Main areas served by our mold air testing experts

North Shore of Montreal

We serve the North Shore of Montreal, including Laval, Mascouche, Terrebonne, Mirabel, Saint-Jérôme, Le Gardeur, Deux-Montagnes, Saint-Eustache, Pointe-Calumet, Saint-Joseph-du-Lac, Sainte-Marthe-sur-le-Lac, Blainville, Boisbriand, Bois-des-Filion, Lorraine, Rosemère, Sainte-Anne-des-Plaines, Sainte-Thérèse, Charlemagne, L’Assomption, Repentigny, Saint-Sulpice and L’Épiphanie.

City of Montreal

We serve the greater city of Montreal, including the following boroughs: Ahuntsic-Cartierville, Anjou, Côte-des-Neiges–Notre-Dame-de-Grâce, Lachine, LaSalle, Le Plateau-Mont-Royal, Le Sud-Ouest, L’Île-Bizard–Sainte-Geneviève, Mercier–Hochelaga-Maisonneuve, Montréal-Nord, Outremont, Pierrefonds-Roxboro, Rivière-des-Prairies–Pointe-aux-Trembles, Rosemont–La Petite-Patrie, Saint-Laurent, Saint-Léonard, Verdun, Ville-Marie and Villeray–Saint-Michel–Parc-Extension.

South Shore of Montreal

We serve a large portion of Montérégie, including Longueuil, Greenfield Park, Saint-Hubert, Brossard, Belœil, Boucherville, Candiac, Carignan, Chambly, Châteauguay, Delson, La Prairie, McMasterville, Mont-Saint-Hilaire, Otterburn Park, Saint-Basile-le-Grand, Saint-Bruno-de-Montarville, Sainte-Catherine, Saint-Constant, Saint-Isidore, Sainte-Julie, Saint-Lambert, Saint-Philippe, Saint-Jean-sur-Richelieu and Varennes.