radonbarrière

Radonbarrière is a construction feature designed to limit the ingress of radon gas from soil into buildings. It is typically installed in new-build projects or major renovations in areas with elevated radon potential. The term refers to a continuous, gas-impermeable layer that acts as a barrier between the soil and the interior of the structure.

The barrier is usually a polyethylene film or a specialized polymer membrane placed beneath the ground floor slab, inside foundation walls, or within other parts of the floor assembly. The seams and penetrations are carefully sealed to prevent leaks, and the layer is continuous to minimize pathways for soil gas to reach the interior. The primary function is to reduce the entry of radon and other soil gases, complementing other moisture and vapor management measures.

In practice, radonbarrière is often part of a broader radon protection strategy that may include sub-slab ventilation or radon venting systems. These active systems use a suction point and vent pipe to draw radon-laden air from beneath the building and discharge it above the roofline. The barrier itself is a passive measure but works best when properly integrated with such systems and with good installation practices during construction.

Regulatory and guidance frameworks for radon protection vary by country and region. Many jurisdictions require a radon barrier or equivalent protective measures in new constructions located in high-radon areas, while others rely on performance-based standards or post-construction radon testing to verify safety. Radon testing remains important after occupancy to ensure indoor radon levels remain within acceptable limits.