Roof Substrate "interroof-intensiv extra leicht"

According to FLL Directive

The roof substrate interroof-intensiv extra leicht is extra light, ready-to-use, blowable substrate according to FLL consisting of pumice, lava, expanded clay and compost for very low roof loads.

A large variety of plants is available for intensive greening. The intensive greening is therefore comparable with a common green area.

intensive substrate for green roofs

Field of Application

  • sophisticated roof greening with higher maintenance ("roof garden")
  • for perennials, small bushes and shrubs
  • very low roof loads

Product Description

  • components: pumice, lava, expanded clay and compost
  • 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 processing 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. 700-800 kg/m³

Paving compaction

approx. 20-25 %

Weight when saturated

approx. 1.200-1.300 kg/m³

Max. water capacity

approx. 40-50 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