Pre-formed geocellular sub-base replacement unit attention/ infiltration system. The ArborRaft System creates an artificial forest floor which prevents soil compaction and protects the hard landscape. It creates an air void which diverts root growth away from the surface. It works with the tree’s roots to guarantee delivery of essential water and nutrients yet also encouraging root growth that mirrors the tree’s canopy.


Can be combined with:

  • Tree Guard.
  • Tree Grille.
  • ArborTex 300 Membrane.
  • ArborRaft Connector.
  • ArborRaft TRC30 Membrane.
  • Mona Irrigation.
  • GT Rootbarrier.
  • Anchor System.
  • ArborRaft Soil.

Standard product features






3.28 kg.

Size (l x w x h):

708 x 354 x 150 mm.

Technical properties:

  • Short term compressive strength: Vertical: 715 kN/m²; Lateral: 156 kN/m².
  • Short term deflection: Vertical: 1 mm/ 126 kN/m²; Lateral: 1 mm/15 kN/m².
  • Tensile strength of a single joint: Ultimate: 42.4 kN/m²; 1% secant modulus: 18.8 kN/m².
  • Bending resistance: Unit: 0.71 kN/m; Single joint 0.16 kN/m.
  • Volumetric void ratio: 95%.
  • Effective perforated surface area (average): 52%.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-40-65/360 Underground guying
45-65-35/307 Plastics geocell sheets

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying



gtSpecifier by Green-Tech Ltd


+44 (0)1423 332114

Product reference

ArborRaft Unit

Manufacturer details

Rabbit Hill Park,
Great North Road,
North Yorkshire, HG5 0FF
Tel +44 (0)1423 332114
Fax +44 (0)1423 332101
NBS Plus