FAQ
Quick answers,
straight from the team.
Everything we get asked about radon, mold, VOCs, asbestos, and particulate matter testing. Don’t see your question? Get in touch.
Health Canada recommends a long-term test of at least 91 days — ideally 3 to 12 months — with at least 91 days in the heating season, to estimate your home's yearly average. We also offer 2–7 day short-term tests — useful when time is limited, such as during a home sale — and ~4-hour diagnostic scans that show where radon is getting in. Both are screening tools: Health Canada says short-term results aren't appropriate for deciding on mitigation.
Short-term tests (2–7 days) provide a quick screening snapshot. Long-term tests (at least 91 days) average out natural fluctuations and give a reasonable estimate of your yearly average. Because radon varies with weather, pressure, and occupancy, Health Canada says only a long-term result should be compared with the 200 Bq/m³ guideline or used to decide on mitigation.
Health Canada recommends re-testing in the next heating season after renovations that affect the structure or ventilation (like finishing a basement or installing a new furnace), energy retrofits (new windows, insulation or sealing), major excavation next to the home, new damage to the foundation or basement walls, a lower floor becoming lived-in, or a radon mitigation system being installed. Test a new home in its first heating season and again 2 years after construction, and a home with an active soil depressurization system every 5 years. If a result below 200 Bq/m³ had fewer than 91 days in the heating season, re-test next heating season.
Test when you notice a musty odour, visible growth, water damage, persistent respiratory symptoms, or if your home has high humidity or poor ventilation. Our assessment also looks for the moisture source — without fixing moisture, mold returns.
Airborne testing tells you whether asbestos fibers are in the air — for example after materials in an older (pre-1990) building have been damaged or disturbed. It isn't an asbestos survey: before renovation or demolition, a hazardous materials survey by a WorkSafeBC-licensed asbestos professional is needed. We test air only and don't sample building materials.
Radon, mold and fungal spores (Cladosporium, Aspergillus, Stachybotrys), Volatile Organic Compounds (VOCs), airborne asbestos (Serpentine and Amphibole types), and particulate matter (PM2.5 and PM10).
We serve all of Vancouver Island — including Victoria, Sidney, Sooke, Duncan, Nanaimo, Parksville, Qualicum Beach, Port Alberni, Courtenay, Comox, Campbell River, and the West Coast (Tofino / Ucluelet).
Yes. Our radon testing follows Health Canada's guide for radon measurements in homes and the Canadian National Radon Proficiency Program (C-NRPP) measurement protocols. Nasser Ferdosi is a C-NRPP Certified Radon Measurement Professional and a member of the Canadian Association of Radon Scientists & Technologists (CARST).
Every report includes measured concentrations, guideline comparisons, plain-language interpretation, and practical recommendations. We focus on translating technical data into clear, practical next steps.
We recommend concrete next steps. For radon, Health Canada recommends reducing a long-term average above 200 Bq/m³ within 1 year — sooner if it's higher — and a sub-slab depressurization system can typically reduce levels by 80–95%. For mold and VOCs, source control and ventilation are usually the most effective actions. For asbestos, professional abatement may be required. We don't install or remediate — we'll point you to certified professionals and can re-test radon or mold afterwards.
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