Question 1

How much does mold testing cost in Markham?

Accepted Answer

Mold inspection in Markham starts from $299, which covers a targeted assessment with air cassette sampling and AIHA-accredited lab analysis. A full-home mold assessment including thermal imaging, moisture mapping, and multiple room air samples runs from $449. Post-remediation clearance testing — confirming that remediation was successful — starts from $249. Considering that professional mold remediation in Markham typically costs $2,000–$15,000 depending on scope, the testing cost is negligible relative to what it confirms or rules out.

Question 2

How do I know if I have mold?

Accepted Answer

The most common indicators of a mold problem in a Markham home are: a persistent musty or earthy odour, especially in basements, bathrooms, or after HVAC runs; visible discolouration on walls, ceilings, or around windows; unexplained respiratory symptoms, persistent coughing, or worsening allergies in occupants; and a history of water damage or flooding. However, mold colonies frequently establish behind finished walls, in attic sheathing, or in HVAC ductwork where visual signs are absent. Air sampling is the only reliable method to detect and quantify mold when the source is hidden.

Question 3

Do you do mold remediation?

Accepted Answer

No — and that independence is deliberate and important. ASADS is a mold inspection and testing service only. We do not perform remediation and have no financial relationship with any remediation contractor. This means our assessment is completely unbiased: if your Markham home tests clean, we tell you that clearly. If elevated spore counts or toxic species are identified, we provide a written remediation scope of work that you can send to any contractor for competitive quotes. Our independent reports are accepted by insurance companies, landlord-tenant tribunals, real estate lawyers, and remediation companies.

Question 4

What is black mold?

Accepted Answer

Black mold typically refers to Stachybotrys chartarum, a species that produces mycotoxins linked to serious respiratory and neurological health effects under chronic high-dose exposure. Critically, not all dark or black-coloured mold growth is Stachybotrys — many common mold species appear dark or black, and Stachybotrys itself requires very specific chronically wet conditions to establish. Visual identification is unreliable. Our AIHA-accredited PCR/DNA testing definitively identifies mold species present in your Markham home, so you are not making remediation decisions based on assumptions. If Stachybotrys is confirmed, we provide a scope of work and remediation protocol consistent with Health Canada guidelines.

Mold Inspection Markham | AIHA Lab Testing | ASADS