Extensive Mineral Substrate Light for Green Roofs

Roof Substrate "interroof-mineral light"

According to FLL Directive

The mineral substrate interroof-mineral light is a light, ready-to-use and extensive blowable substrate for single-layer construction according to FLL consisting of pumice, lava and expanded clay for low roof loads.

Extensive Mineral Substrate Light

Field of Application

  • simple roof greening with low maintenance (e.g. garages, carports, industrial halls)
  • for sedum sprouts, succulents, herbs and small root ball plants
  • drainage substrate, as well as a filling substrate for intensive greening with higher layer structures at low roof load

Product Description

  • components: pumice, lava and expanded clay
  • structurally stable mineral / organic roof substrate
  • pressure-resistant, segregation-proof
  • optimum tread resistance
  • good structural stability
  • little subsidence
  • provides for hard-wearing green areas
  • good root development
  • good water permeability
  • good water storage capacity
  • better air supply 
  • prevents waterlogging
  • supplies the roots with sufficient nutrients and water
  • buffers the nutrients and promotes growth
  • pH-stable, low salt, long-term stable
  • weed-free
  • suitable for silo trucks, transportable up to 150 m
  • can be processed even in wet conditions and light frost

iNTERBiMS GmbH stands for careful sorting and preparation as well as for the production and supply of high-quality products with a quality management system that meets the requirements of ISO 9001:2015 according to the certificate of TÜV SÜD.


Grain size 0-12 mm

Loose bulk density DIN EN 1097-3

approx. 800-900 kg/m³

Paving compaction

approx. 10-15 %

Weight when saturated

approx. 1.100-1.250 kg/m³

Max. water capacity

approx. 25-35 Vol.-%

PH value (CaCI2)

approx. 6,5-7,5

Salt content

approx. 0,1-0,5 g/l

Delivery Form

 ✓   Truck 

 ✓   Big Bag at 1.00 m³ / 1.50 m³

 ✓   Bag of 25 litres / 40 litres

 ✓   Silo truck