Algoma Radon Testing strongly recommends that all new buildings install a Radon Reduction Control System as part of initial construction. This will help facilitate corrective action to lower radon levels.
If you are constructing renovations in your home or building such as installing new windows and doors or adding insulation you should always test for radon after completion. These types of renovations will lower the air exchange rates and the radon could accumulate to high levels.
When planning major structual renovations, such as converting an unfinished basenent area into living space, it is important to test for radon before you begin renovations. If your test results indicate a radon problem, radon ressistant techniques can be inexpensively included as part of the renovation. Because major renovations can change the level of radon in any home or building always test after work is completed.