How does Radon enter a home? Unfinished floors, construction joints, gaps around pipes, support posts, window casements, floor drains sumps, etc. There are a number of factors that result in different Radon levels including bedrock type, soil type, soil moisture level, seasonal freezing and thawing, plus house design and construction. Both newer and older homes should be tested. You can hire a professional: visit htt://c-nrpp.ca/ for a list of Radon testing professionals. Or you can purchase a do-it-yourself kit (online or at a home improvement store) Short term kits are available, however, long term tests are more reliable as Radon levels fluctuate daily and seasonally. A three month test is more accurate and representative of a person’s average exposure. Health Canada has information regarding kits at email@example.com
And just what do you do if high levels of Radon are found in your home…hire a professional! You can seal foundation cracks and potential points of entry, but given the costs of remediation are typically under $4500, your health is worth getting Radon dealt with professionally.
Source: CREA -A Homeowner’s Guide to Radon