Green roofs
The drainage course and part of the growing medium, at the lowest saturated weight available.
Horticulture & green roof
Leca Green Roof 8–16
Product code ALG-0816
The green roof drainage layer: light and frost-stable.
A uniform 8–16 mm fraction with high porosity: rapid drainage in heavy rain, moisture storage for the dry spell after it.
- Grain size
- 8–16 mm
- Loose bulk density
- 280–340 kg/m³
Description
The drainage layer in both extensive and intensive green roofs. Its low saturated weight cuts the roof dead load sharply compared with a gravel drainage course.
Packaging & shipping
- Big bag 1 m³
- Bulk tipper 60–90 m³
Standards
- FLL
- EN 13055-1
Technical data
| Grain size | 8–16 mm |
|---|---|
| Loose bulk density | 280–340 kg/m³ |
| Particle density | 560 kg/m³ |
| Crushing resistance | 1.1 MPa |
| Thermal conductivity | 0.093 W/m·K |
| Water absorption (24 h) | 18 % |
| pH | 7.2 |
| Fire resistance | 1150 °C |
Values published in datasheets are typical production values within the stated tolerance band. They do not replace engineering design, mix-design trials, or the requirements of a project specification.
Applications
Filtration & water treatment
Filter bed and biofilm carrier in wastewater treatment and drainage systems.
Related grades
Horticulture & green roof
Leca Garden 4–10
Washed and dust-free, for growing media and hydroponics.
- Grain size
- 4–10 mm
- Loose bulk density
- 300–380 kg/m³
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