Water retention box WRB 80F
Water Retention Box made of recycled HDPE material. With high temporary and possibly permanent retention volume in combination with a Flow Control System for specific regulation of water discharge and/or water storage.
Product properties
| Material | Recycled HDPE |
| Nominal thickness | approx. 80 mm |
| Grammage | approx. 3.6 kg/m² |
| Retention volume | approx. 72.0 l/m² |

Area of use
- For the construction of retention roofs on roof areas with 0° roof pitch
- Suitable for use under extensive and semi-intensive greening
- Not suitable for use under walking or driving surfaces
Specific properties
- For temporary and/or permanent storage of rainwater with regulated water discharge through a Flow Control System
- With Capillary Columns to transport stored rainwater from the drainage level into the substrate layer and to increase evaporation (accessories)
- Flow Control-independent water storage of 3 l/m² or 6 l/m², depending on the laying side
- With freely flowable structure for quick distribution of rainwater within the retention room
- Low delivery costs due to delivery in open state, laying state folded together
- Suitable for inverted roofs (when used on inverted insulation, no permanent water storage is possible)

Optigrün Retention roofs win the PLUS X AWARD
Optigrün international AG is the proud winner of the PLUS X AWARD, the world's largest innovation award for technology, sports, and lifestyle. It honors brands for the quality and innovative edge of their products. The award is presented by an independent, international jury of experts.
Optigrün retention roofs impressed in 5 out of 7 categories and were awarded seals of approval for Innovation, High Quality, Ease of Use, Functionality and Ecology. These serve as a guide for customers and retailers when making purchases, stand for outstanding product features, and help to quickly and clearly recognize the added value of an award-winning product over the competition.