Since mould is often hidden, here are some key times to conduct testing:
Before Closing a Sale
Before purchasing a home, consider conducting a mould test. Given its hidden nature, mould issues are usually unknown until they cause health or structural problems. Testing ensures the property is free from such concerns.
If the Home Experienced Construction Delays
Weather-related delays, such as heavy rain or snow, can expose building materials to prolonged moisture. Mould testing helps homeowners confirm whether any lingering issues have developed - the testing process can be found here.
After Noticing Persistent Odours
Musty or earthy smells in a new home may indicate hidden mould growth, even if no visible signs are present. Testing can confirm and pinpoint the source of the issue.
Following Cleaning or Debris Removal
Once construction dust and debris have been cleared, mould testing ensures accurate results by eliminating interference from airborne particulates.
How to complete the testing:
Here are some key techniques to identify if mould is present:
1. Start with a Visual Inspection
Before conducting formal testing, perform a thorough visual inspection. Pay attention to:
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Moisture-prone areas such as basements, bathrooms, kitchens, and around HVAC systems.
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Water stains, discolouration, or peeling paint, which could indicate trapped moisture.
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Poorly sealed windows, improperly installed flashing, or gaps in siding that could allow water intrusion.
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Hidden areas, such as behind cabinets or under sinks.
2. Air Sampling
Air sampling is an effective way to measure mould spore concentrations in the home’s air - the testing process can be found here.
3. Inspect HVAC Systems
HVAC systems can harbour mould and distribute spores throughout the home. During inspections:
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Check air ducts, filters, and vents for visible mould or excessive dust buildup.
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Schedule regular duct cleaning and system maintenance if mould or moisture is detected.
4. Test After Cleaning and Ventilation
Construction debris and dust can cloud test results. Ensure the home has been thoroughly cleaned and ventilated before conducting air or surface sampling.
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Use HEPA-filtered vacuums to remove fine particulates.
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Verify proper ventilation in bathrooms and kitchens to ensure fans exhaust air outside rather than into attics or crawl spaces.
5. Pay Attention to Environmental Conditions
Ambient conditions during testing can influence mould growth and sample accuracy:
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Record temperature and humidity levels at the time of inspection. Humidity above 60% can encourage mould development.
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Avoid testing during active construction or immediately after cleaning activities that may increase airborne debris.
