Indoor Environmental

​Odours are the human body’s reaction to a particular chemical or chemical mixtures.  These odorous chemicals come from mould, bacteria, sewer gases, decomposing rodents or their wastes, combustion gas fumes (car or furnace), and pets (to name a few of the common odour sources).  These certainly affect indoor environmental quality problems in buildings. Odours are organic or inorganic compounds and can be both pleasant and unpleasant. Some chemicals (at low concentrations) can be health hazards before they are detected by the nose, while others even at relatively high concentration are irritating, but not a health hazard for most people (people with environmental or chemical sensitivities may have health effects at very low concentrations of many chemicals). While most chemical contaminants originate from within the building, chemicals can be drawn into a building from the outdoors as well.  We will work to identify what these chemicals are, whether they are a health hazard or not in your circumstances, where they come from, and most importantly, what can be done to eliminate this problem.

Mould (mold in US) is a type of fungus that is also commonly called mildew.  Mould grows from microscopic spores into visible mould colonies in as little as 48 hours.  To grow, mould requires 4 things: moisture (also high air relative humidity), a food source, oxygen and heat (0 degrees Celsius or above is sufficient).  These factors are present in the indoor environment but the only one that we can control enough to prevent mould growth is to control moisture and humidity.  Mould releases spores in order to spread but the spores that are released, regardless of the number, that land on a surface will not develop into mould unless there is sufficient moisture or high humidity present.  While indoors, breathing in large amounts of these spores and the by-products they produce can negatively impact your health.  For this reason, mould should not be tolerated indoors.  We can help by identifying hidden mould, the seriousness of mould that is present, the causes of the mould growth and how to prevent mould from coming back.


  • Mould evaluation and testing
  • General air quality evaluations
  • Bacterial contamination evaluation and testing
  • Radon evaluation and testing
  • Indoor environmental evaluation prior to home or business purchase
  • Asbestos surveys, audits, assessments and testing
  • Environmental Assessments- Phase I and II
  • VOC (volatile organic compounds) and formaldehyde testing
  • Airborne and surface dust measurements
  • Airborne chemical pollutants measurements


We not only scientifically evaluate the risk and extent of environmental problems (such as pollutants including mould) in a building, but we can advise you on the safest and most effective specific techniques for solving these problems.


CALL  514  990-7167



Indoor Air Quality Consultants with Integrity
Indoor Air Quality Consultants with Experience


We offer you scientifically sound, unbiased evaluations.  We aren’t compromised by slanting our evaluation of your problem or situation by wanting to sell you something (a product that supposedly solves the problem we identified or a service offered in-house) or by looking to refer you to someone else for a commission.


Our principal investigator, Roderick Thorpe, has 20+ years of experience in the indoor air quality/environmental evaluation field.  He has examined a wide range of problems and situations in thousands of large and small buildings of all types (including residential, commercial, institutional, governmental) from a single closet in a house to an entire large high rise building or a large school or a small office.

Indoor Air Quality Consultants Customer Service

We care

Because we are a small company, there is always the same person to be there to first listen to what you have to say, then clearly explain to you how we can help solve your problem or assess your building’s condition.  That same person will be the same one to come to your premises or business and work to solve your problem or assess the condition.  He will work relentlessly at this task until we have a viable solution for you.


In summary, we commit to do an unbiased evaluation of your building’s problems or conditions to arrive at a viable solution helped by our appropriate education, training and experience and all because we care


Indoor Air Quality Consultants Eductation and Trainin

Education and training

Roderick Thorpe has sound fundamental knowledge in the indoor environmental consulting field after having completed an MSc degree in chemistry plus a graduate course in indoor air quality at the Building Studies Department, Engineering Faculty of Concordia University.  Further specific investigational training has come from an Indoor Air Quality Professional course from the American Indoor Air Quality Council (now American Council for Accredited Certification- ACAC) and an indoor air quality inspection course from Canada Mortgage and Housing Corporation- CMHC.  He supplements this training by regularly attending conferences, courses and seminars throughout North America on new developments in the indoor environmental field.

CALL  514  990-7167

Indoor Air Quality services residential and commercial
Solutions for mold decontamination residential and commercial
Solutions for Indoor Air Quality problems residential and commercial


Indoor Air Quality



A general survey includes an investigation to determine the air quality of the office environment in your building. The investigation includes a comprehensive report to you with all of our findings and specific recommendations for actions to correct any problems found.



Protocol Design For Mould Decontamination


After identifying the extent of the mould contamination, we will then develop the appropriate decontamination specifications based on the published and widely accepted mould remediation guidelines of the Canadian Construction Association, Canada Mortgage and Housing Corporation (CMHC).



Solutions To Indoor Air Quality Problems


Mould, mildew, bacteria, fungi, yeasts. require analysis of a specialist to make the right suggestions for an effective and most environmentally-friendly control techniques for microbial contamination in the indoor environment.





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