INSTALLATION GUIDE
Laying course (optional)
WATER COURSES FOR RIVER/CANAL BANKS:
GRASSGRID GROUND REINFORCEMENT INSTALLATION Sub-base If ground is unstable, prepare sub-base of granular type 1 material If heavier traffic is envisaged, please refer to our Technical Department for guidance Bedding/laying Prepare 20mm compacted laying course of sharp sand and (if available) loam: mix 50:50 Screed lightly and lay units in rows or half-bonded (preferably in restrained area) Tamp down with paviour’s maul Fill cavities with Topsoil to BS 3882 General Purpose or Premium Grade to within 30mm of surface: sow with grass seed* and top up cavities with soil to level of surface
Units GRASSGRID MAINTENANCE Ideally sow seed in Spring and wait 4 weeks minimum before allowing trafficking.
Laying course
Sub-grade Sub-grade Sub-base Condition of the sub-grade needs to be assessed with extra care. It must be stable before laying. Sub-base Not normally required. Laying course Material: geotextile membrane (eg. Terram – see Fig 5). Staggered vertical jointing plus every 2nd or 3rd row staked with 500mm wood or metal pins to ensure stability. Edge restraints Not normally required (see under Laying design). Sub-grade Laying course Perforations: (to allow root penetration/ stem reinforcement during growth of reeds and aquatic plants): 0.2-0.4mm (200- 400 microns). Protects sub-soil and prevents erosion by waterflow. Laying course (optio al) Units
PCC Edging
Water regularly to sustain growth and prevent soil shrinkage, especially after heavy trafficking or prolonged dry weather.
Laying course (optional)
Units
Metal pins or wooden stakes placed every 2 or 3 rows to act as shore restraints
*recommended: British Seed Houses Mixture A7.
PCC Edging
Metal pins or wooden stakes placed every 2 or 3 rows to act as shore restraints
Laying course (optional)
Geotextile fabric beneath Grassgrid
Units
Metal pins or wooden stakes placed every 2 or 3 rows to act as shore restraints
Fig 4. G radients – with shore restraint pins.
Fig 5. Water courses – with geotextile fabric and shore restraint pins.
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TECHNICAL INFORMATION: charcon.technical@aggregate.com
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