Cupolex Windi

CUPOLEX® WINDI® creates a ventilated floor in new or remodeled buildings without affecting the structure of the building. The adoption of CUPOLEX® WINDI® allows you to save on waterproof sheathing and guarantees a constant seal against dampness. CUPOLEX®-WINDI® may also be easily attached to walls to create a void capable of ventilating and eliminating mold or installed to create ventilated flat or pitched roofs.

CUPOLEX® WINDI®, protects the upper concrete from the rising damp, while the void created underneath can be mechanically or naturally ventilated to eliminate humidity and/or gasses.


  • Radon & Soil Gas Mitigation
  • Basement ventilated floor
  • Post tensioned reinforced Concrete Slabs
  • Concrete Slab on Grade or basement slabs
  • Replacing Gravel Drainage Layers
  • Replacing Vapor Barriers & Liners
  • Technical/Electrical Sub Floors
  • Ventilating flat or pitched roofs
  • Green Roofs
  • Solution to provide a drainage layer on terraces and balconies.



Humidity and Vapor Intrusion/Radon Mitigation


Bad or Expansive Soils


Celle Frigo


Stormwater Management


Concrete Roads


  • Guarantees an optimal ventilation
  • Saves gravel or other infill material
  • Mechanical or natural ventilation
  • CUPOLEX, being a closed cell element, creates a waterproofing layer
  • Can be laid on any sub-layer: concrete underground layer, soil, gravel etc.
  • Easy and quick installation
  • Supports any traditional finishing: straight edge, helicopter etc.
  • 14 LEED points


  • Prepare sub-base as specified
  • Each WINDI® Form has an installation arrow
  • Forms are Installed by starting from left to right and top to bottom
  • Installation follows a design layout
  • Lay the reinforcing mesh directly on top of WINDI leaving the appropriate cover
  • Pouring and finishing of the concrete slab in the conventional manner


Pontarolo Engineering S.p.a. gives full technical assistance with project design, specifications, BIM objects and logistic service.


  • Typical WINDI slab design
Typical WINDI slab design
Structure use Dead Load (Kg/m2) Live Load (Kg/m2) Slab Thickness (cm) Reinforcement
Residential 200 200 4 d.5/20×20
Offices 200 300 5 d.5/20×20
Garages 300 700 5 d.6/20×20
Industry 300 1200 6 d.8/20×20
Industry 300 1600 7 d.8/15×15

In case of higher loads please contact our technical office.

Values in the following table shows the maximum uniformely distributed loads accepted and the reinforcement as a function of the slab thickness, keeping in consideration a soil Kw = 0.02 N/mm3 , 10cm of  concrete underneath, and slab concrete on top of class C25/30.


  • Brochures
  • Data Sheets
  • DWG and CAD
  • BIM
  • Specifications
Data Sheets


San Vito al Tagliamento

PONTAROLO ENGINEERING SPA have been working in the construction business for over 55 years.
+39 0434 857010

Subscribe to our Newsletter

Directly receive all the updates on our events and technologies


    Follow our news and activities on social media

    Privacy Policy

    Cookie Policy