Filling substrate, sub-Substrate, HeaVY

Filling Substrate "interroof-Füllsubstrat schwer"

Our sub-substrates are purely mineral and are available both loose and blowable. interroof-Füllsubstrat schwer is a ready-to-use mineral sub-substrate consisting of soil, pumice, lava and sand.

Filling substrate

Field of Application

  • substrate for multilayer structures
  • filler for filling the installation space

Product Description

  • components: Loess, pumice, lava and sand
  • structurally stable mineral sub-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
  • can be processed even in wet conditions and light frost
  • suitable for silo trucks, transportable up to 150 m

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 0-16 mm

Loose bulk density DIN EN 1097-3

approx. 1.100-1.200 kg/m³

Paving compaction

approx. 20 %

Weight when saturated

approx. 1.400-1.500 kg/m³

Max. water capacity

approx. 20-30 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

 ✓   Silo truck