Energy efficient improvements can help lower utility bills and keep the home at the right temperature, but the tighter windows, doors and HVAC system mean the air is now essentially trapped. Radioactive radon gas can linger in these tight spaces and accumulate. If these levels rise too high, you need to take action.
After installing a new HVAC system with new ductwork or replacing windows and doors with energy-efficient alternatives, it is recommended to have a radon test conducted after the dust settles. Many homeowners fail to discover elevated levels until they plan to sell the home. Retesting before you sell can help you lower your risk of long-term exposure and allow you to create a remediation plan.