DSI - Professional Drainage Solutions
Optigrün Lightweight Roof
Optigrün Lightweight Roof
LIGHTWEIGHT ROOF
The slim green roof structure for roofs with low static reserves (0-5°)
With the LIGHTWEIGHT ROOF , roofs can be greened if their statics only allow a low load. Even when saturated with water, LIGHTWEIGHT ROOF weighs only around 55 kg/m² and is therefore significantly lighter than an average gravel roof with a 50 mm structure. The slim green roof structure is ideal for renovating older roofs without structural reserves and for large industrial roofs, for example.
The LIGHTWEIGHT ROOF system can generally be used on flat roofs with fixed waterproofing. Inverted roofs are unsuitable for the lightweight roof.
The lightweight substrate L exceeds the requirements of the FLL Green Roof Guidelines for extensive single-layer substrates.
The LIGHTWEIGHT ROOF system is suitable for 0-5° roofs and is drained via a solid drainage system (FKD).
| Ecological value |  |
| Maintenance costs |  |
| Costs* | from 44€/m² |
Technical specifications
| Weight* | from 55 kg/m² or 0.55 kN/m² |
| Build-up depth | from 60 mm |
| Roof pitch | 0-5° |
| Vegetation form | moss-sedum |
| Water retention | 40-50 %/year |
| Discharge coefficient** | Cs = 0.5-0.6 |
| Water storage | approx. 18 l/m² |
* Weight specifications refer to saturated conditions; dry weight is approximately 60 - 70 % of the saturated weight.
** In accordance with the current FLL Green Roof Guidelines.
