Radon Information (General Questions)
How do I test for Radon?
You can use a short-term or long-term Radon test kit, or hire a professional to conduct a thorough assessment.
What is the best time to do a Radon test?
The best time to test for Radon is during the heating season (fall or winter) when homes are closed and radon levels are typically higher. However, Radon testing can be done any time of the year, and long-term testing provides the most accurate results.
Is a one-day radon test during a home inspection reliable?
No. A one-day radon test during a home inspection is generally not reliable and is not recommended for determining long-term radon exposure. Radon levels fluctuate throughout the day depending on weather, ventilation, and pressure differences in the home.
Health Canada recommends testing for at least 7 days, while long-term testing (90 days or more) provides the most accurate average radon level. Shorter tests may provide a quick indication but should be confirmed with longer testing whenever possible.
Health Canada recommends testing for at least 7 days, while long-term testing (90 days or more) provides the most accurate average radon level. Shorter tests may provide a quick indication but should be confirmed with longer testing whenever possible.
What is short-term and long-term Radon Test?
A long-term Radon test measures Radon levels over 90 days or more. It provides the most accurate estimate of the average Radon concentration in a home.
A short-term Radon test measures Radon levels for 2 to 7 days. It provides a quick indication of Radon presence but is less accurate than long-term testing.
A short-term Radon test measures Radon levels for 2 to 7 days. It provides a quick indication of Radon presence but is less accurate than long-term testing.
Which test should I use to know if mitigation is needed?
- A long-term test is the most reliable way to determine whether Radon mitigation is necessary.
- Short-term tests can indicate elevated levels but should be confirmed with longer testing.
- In real estate transactions, short-term tests are often used to quickly identify elevated Radon levels and support mitigation decisions.
What are safe Radon levels?
Health Canada recommends keeping Radon levels below 200 Bq/m³. If levels exceed this threshold, mitigation is necessary.
Is Radon only a problem in older homes?
No, Radon affects both old and new houses. Never homes are build with a tighter construction, however this not guaranteed that Radon can be present inside the house.
Where should a Radon test be placed?
Radon tests should be placed in the lowest level of the home that is regularly occupied, such as a basement or ground floor living area.
How often should Radon testing be done?
Health Canada recommends testing every 5 years, or after major renovations, foundation work, or changes to the home’s ventilation system.
Our Services (CRSS)
Can Radon be removed from my home?
Yes. A Radon mitigation system, such as sub-slab depressurization, can effectively reduce Radon levels in homes and buildings.
How long does Radon mitigation take?
Most mitigation systems can be installed in one day by a certified professional.
Do Radon mitigation systems require maintenance?
Most systems require minimal maintenance, but periodic checks ensure the fan and system components continue working effectively over time.
Can I test for Radon myself or have CRSS perform the test?
You can test your home yourself using a Radon test kit, or RCSS can perform professional Radon testing for you. Professional testing includes proper placement and certified measurement.
Is there a cost if CRSS performs the Radon test?
Yes, professional testing has a service fee. However, if you choose CRSS to install your mitigation system, the cost of your Radon test kit can be reimbursed.
Do you provide Radon test kits?
Yes. CRSS provides radon test kits, and the cost of the kit can be reimbursed when a mitigation system is installed by our team.
How much does Radon mitigation cost?
The cost of Radon mitigation depends on the home structure and system design. Most residential mitigation systems in Canada typically range between $1,500 and $4,000.
Will a Radon mitigation system increase my energy costs?
Radon mitigation systems use a small fan that consumes minimal electricity. The operating cost is typically comparable to running a low-wattage household appliance.
Does installing a Radon mitigation system affect home value?
Installing a Radon mitigation system can improve indoor air safety and may increase buyer confidence when selling a home in areas with known radon risks.
If I’m selling my home, how quickly can Radon mitigation be installed?
Radon mitigation systems can usually be installed in one day. In real estate transactions, installations can often be scheduled within a few days to help meet closing deadlines.


