Windidrain – For Vegetation Drainage, Water Storage & Aeration


WINDIDRAIN® provides superior water drainage, water storage, and aeration to create a harmonious balance of air and water in the substrate soil.

The WINDIDRAIN® elements are specifically designed for extensive and intensive systems where substantial water retention is required for plant usage. They are light weight panels made of 100% recycled polypropylene, molded specially and designed with retention cups and drainage.

The unique design allows for the free drainage of excess water, achieving flow rates from 10 to 30 times higher than that of conventional drainage methods. At the same time, the system is engineered to promote irrigation through capillary action and evaporation into the soil/vegetation level. WINDIDRAIN® may easily be installed over waterproofing membranes or insulation. It is easily cut to fit around penetrations, perimeters, and drains. In applications where intensive systems are required, the retention cups may be filled with mineral substrates.

WINDIDRAIN® may also be installed to create green areas where it was not previously possible. Plants and flowers, now may easily be achieved on existing roofs, terraces and paved yards. The WINDIDRAIN® system, has a wide range of utilizations: To change the terrace floor into a garden plot with shrubs and trees, is easy as laying the WINDIDRAIN® elements on an existing terrace or balcony, applying the required filter fabric, laying the soil and planting.


  • Rounded feet allow elements to be applied directly on the waterproofing;
  • Unlike other systems, WINDIDRAIN® creates a consistent cavity underneath in all directions for passing of irrigation systems, pipes or other services;
  • Ventilation and aeration in all directions;
  • Made of 100% recycled high density polyethylene
  • Suitable for steep roofs, due to its patented interlocking system;
  • Superior drainage of excess water/flow rates;
  • Ideal for use with lightweight engineered soils;
  • Speed and simplicity of assembly are the primary
  • Excellent component for Extensive and Intensive roof assemblies;
  • Cost Competitive;
  • High compressive strength of 6000 kg/m2 ( 9.0 Psi), allowing for
  • Adaptable for both flat and sloped roofs thanks to its patented interlocking design; elements will not move once installed and loaded with substrates; a variety of landscape surfaces, pavers, concrete slabs, pedestrian and vehicular traffic; benefits; plastic;
  • Endless adaptability. Quick cutting using circular saw in unique situations.
  • CUPOLEX WINDIDRAIN® is available in 50mm and 100mm heights.


  • Extensive green roof systems
  • Intensive green roof systems
  • Existing terraces or balconies

Design & Engineering

We provide PE stamped shop drawings through our engineering partners globally, construction training, and installation observation and we work closely with the design team, the contractor, and the owner to ensure the success of the project.  Each site is different, and working with project partners to find installation solutions that address specific site needs is a part of the service we provide.

To begin using CUPOLEX® for your green roof project, visit our Getting Started page for a step-by-step road map on using this product.


  • Rounded feet allow elements to be applied directly on the waterproofing
  • Unlike other systems, WINDIDRAIN creates a consistent cavity underneath in all directions for passing of irrigation systems, pipes or other services
  • WINDIDRAIN elements may also be installed on sloped roofs due to its interlocking design.

The appropriate height of Cupolex Windidrain elements should be selected based upon the required water retention and maximum load capacity for the vegetated roof. This information is provided in the table below:


Form TypeOverall Form DepthPlan Dimension InstalledConcrete Consumption To Top of DomesClear Void EquivalentDead Load of Concrete Structure to Top of DomesData SheetCAD Block
cm (inch)cm (inch)m3/m2 (cy./sq.ft.)cm (inch)kPa (psf)
CUPOLEX WINDI 5-565 (2")56x56 (22"x22")0.008(0.0010)4 (1.57")0.19 (3.96)PDFDWG
CUPOLEX WINDI 10-5610 (4)56x56 (22"x22")0.030(0.0036)7 (2.76")0.71 (14.82)PDFDWG



  • Cupolex Windidrain Green Roof Details


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