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Lightweight Grasscrete void former, reinforcement mesh, concrete soil and seed options used to create a monolithic cellular reinforced paving area using in-situ concrete suitable for the following applications:

  • Vehicle parking.
  • Access roads.
  • Fire and emergency access.
  • Laybys and highway verges.
  • Sustainable urban drainage systems (SUDS).
  • Helipads and military installations.
  • Slope protection, drainage channels, swales and spillways.

Structural performance:

  • Modular, pre-cast concrete or plastic systems rely significantly upon grass for stability by forming a composite tensile matrix which, under constant load and vibration from traffic grass root anchorage can be loosened. By contrast Grasscrete isn't structurally influenced by grass and can therefore be trafficked before grass establishment.
  • Modular, pre-cast concrete or plastic systems also require edge restraints or kerbs, Grasscrete however requires no such detail, enabling it to blend naturally with adjacent finishes.
  • The unique pocket profile enables the release of frost heave and hydro-static pressure.
  • Soil pockets are enclosed and protected by concrete structure helping to prevent washout and weed colonisation when used on slopes.

Environmental benefits:

  • Capable of draining at rates of up to 90% that of original ground; a feature that helps to maintain natural ground conditions and the local eco-system.
  • Creates a natural biological filter as part of the percolation process that enables either an attenuated ground water re-charge or rainwater harvesting to choice as part of a Sustainable Urban Drainage (SUDS) scheme.
  • The system can incorporate an integral sprinkler system for use in arid climates.
  • Uses re-cycled materials in manufacture.

Standard product features

Lay formers:

600 x 600 mm recycled plastic formers in depths of 76, 100 or 150 mm.


Reinforcement mesh:

Steel mesh reinforcement to BS 4483.


Three options available consisting of:

– No.1 (For vehicular parking or amenity areas):

  • 35 g/m² sowing rate.
  • 50% perennial ryegrass.
  • 20% slender creeping red fescue.
  • 25% strong creeping red fescue.
  • 5% browntop bent.

– No.2 (For fire paths or shaded low maintenance areas):

  • 30 g/m² sowing rate.
  • 20% chewing fescue.
  • 20% slender creeping red fescue.
  • 30% strong creeping red fescue.
  • 25% hard fescue.
  • 5% browntop bent.

– No.3 (For Slopes or road verges):

  • 20 g/m² sowing rate.
  • 25% perennial ryegrass.
  • 20% strong creeping red fescue.
  • 30% hard fescue.
  • 10% smooth stalked meadow grass.
  • 10% browntop bent
  • 5% white clover.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
20-15-45/110 In situ concrete grass-filled paving system

NBS Specification

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

Product specification

An important note about specifying



Grass Concrete Ltd


+44 (0)1924 379443

Product reference



600 x 600 x 100 mm. Vehicle weight (maximum): 13.3 tonnes. Point load 16.65 kN.
600 x 600 x 150 mm. Vehicle weight (maximum): 40 tonnes. Point load 41.0 kN.
600 x 600 x 76 mm. Vehicle weight (maximum): 4.3 tonnes. Point load 10.77 kN.


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Reinforcement mesh

200 x 200 x 7 mm diameter; for use with GC1 or GC3.
200 x 200 x 8 mm diameter; for use with GC1 or GC2.
200 x 200 x 10 mm diameter; for use with GC2.



Manufacturer details

Duncan House,
142 Thornes Lane,
West Yorkshire, WF2 7RE
Tel +44 (0)1924 379443
Fax +44 (0)1924 290289
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