Reliable radon and moisture mitigation

Radon is a colorless, odorless, and tasteless radioactive gas generated by the natural decay of uranium that is found in nearly all soils. It typically moves up through the ground and into a house or building, where it is trapped and continues to build up. Radon is the second most common cause of lung cancer. EnkaRadonVent has been developed to intercept radon and prevent its leading to health problems for occupants.

At the same time, EnkaRadonVent mitigates moisture rise which can negatively affect building foundations.

This is EnkaRadonVent

EnkaRadonVent mats are high-performance building composites. They consist of a 0.8 or 0.9 inch/20 or 23 mm thick matrix of entangled polyamide filaments which forms the core and air space of the product. This matrix is either fully encapsulated in nonwoven polyester fabric, or connected to a nonwoven on one face only. The different types were developed to facilitate their applications with prefabricated concrete slabs and in situ poured concrete alike. The fabric on the lower face separates the underlying soil and aggregate from the core, thus ensuring that the air space remains free from clogging. In applications where the encapsulated product type is used, the cement milk-tight fabric prevents cement from entering the core. Although EnkaRadonVent is very lightweight and easy-to-handle, it withstands the weight of concrete floors without being significantly compressed.

How EnkaRadonVent is used for radon and moisture control

The three-dimensional structure of EnkaRadonVent is very open. The radon mat’s void space exceeds 95 %, which allows radon and air to flow in every direction. Airflow rates significantly exceed those of commonly used aggregate. The result: radon levels are reduced by up to 97 %. Additionally, the circulation of air helps minimize moisture and keep the building dry. EnkaRadonVent also efficiently vents hydrocarbon gases from the soil.

What makes EnkaRadonVent the ideal reinforcement for crack-free subfloors


  • Over 95 % of void space for free flow of radon and air
  • Highly compression-resistant
  • Lightweight: a 100’ / 30 m roll weighs only 27 lbs / 12.2 kg
  • Hinged crease for easy placement along foundation wall
  • Resistant to most soil chemicals and solvents
  • Meets all requirements of floating slab construction


  • Cost-efficient 2-in-1 solution
  • High flow system reduces radon levels up to 97 %
  • Creates an efficient moisture evacuation path
  • Able to sustain the load of a 12″ / 30 cm concrete slab without loss of functionality
  • Easy to handle and install
  • Adaptable to sump systems
  • Creates a healthier living environment
  • Increases the lifespan of the concrete structure
Select region
  • Americas
  • Asia Pacific
  • Europe, Middle East & Africa
Document types
  • Product brochure
  • Solutions brochure
  • Radon Ventilation EnkaRadonVent
    pdf 1mb
  • Building Applications
    Solutions for Drainage, Ventilation, Sound and Spacing
    PDF 2mb
Where to buy EnkaRadonVent (Contact your nearest office)
Sales office
No.9 Xingtang West Road, Chunjiang Zhen, New District 213034 Changzhou, China
Sales, Manufacturing & R&D
1301 Sand Hill Rd, Enka,
NC 28728,
United States