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SOPRARETENTIO BOARD

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SOPRARETENTIO BOARD is a drainage board with water retention properties made from 100% recycled polyester.

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Frequently Asked Questions

The boards are ballasted with a weight that is calculated according to the wind uplift requirements. There should therefore be sufficient weight on the panels so that there is no movement in the system.

The drainage layer at the bottom of the system is designed for that exact purpose. The water flows to drains underneath the green or hybrid roof.

The SOPRARETENTIO BOARD’s targeted function is not capillarity per se. There is a small amount of residual water (out of a maximum of 21.6 L/m2 at full capacity) that gets stored in the polyester blend, but not enough to be used as passive irrigation. It does, however, keep some moisture content in the complete system that provides better retention of water and carbon sequestration from plants.

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