Prolonged exposure to radon can cause health problems. Approximately 2,500 deaths per year are attributed to lung cancer resulting from radon inhalation.

Radon is a naturally occurring radioactive gas, produced as uranium decays to lead. Where radon rises outside buildings it disperses harmlessly, however, harmful radon concentrations can occur where the gas rises within buildings.

There are two levels of radon protection - Basic and Full:

Basic Protection
consists of a continuous radon barrier across the whole footprint of the building including external walls.

Full Protection
consists of a continuous radon barrier across the whole footprint of the building including external walls, plus provision for sub-floor ventilation (e.g. a radon sump for ground-bearing slab situations).