Woollatt Building Supply is now stocking the full line of Radon Corp. products. They have products for testing and mitigation. Radon gas is carcinogen, causing thousands of cases of lung cancer a year. Check the links below to see what Radon is and how it gets in your homes.
https://www.healthunit.com/radon
http://www.hc-sc.gc.ca/ewh-semt/radiation/radon/radon-eng.php