Sub-Base and Macadam to Green

• Supply and lay geotextile (Terram 1000 or equivalent).
  
• Supply, lay and compact 200mm thick layer of frost resistant stone sub-base (top 50mm laid by laser controlled paver).
  
• Supply, lay and roll 40mm thick layer of 20mm open graded bitumen macadam base course and 25mm thick layer of 10mm open graded bitumen macadam wearing course finished WB tolerances.

Bowline Surface
Supply and lay PRO-WEAVE Bowling Carpet on Textile Underlay to meet World Bowls Board Perfomance Standards (Porous- Medium/Fast).

Specification includes:

• Covering of banks and ditches.
  
• Marking out of rinks and greens.
  
• Live bowl and jack markers.
  
• Provision of ditch infill.
  
• Machine stitched seams.
  
• Seven year guarantee.

Perimeter Path to Bowling Green
Provide 1.2m wide path to perimeter of bowling green with precast concrete paving slabs on sand bed on stone foundation or in tarmacadam – Coloured if required.

OPTIONS

Fencing
1.8m high fence with feather edge panels slotted into 2.4m long concrete posts set 600mm into ground and surrounded in concrete, including 150mm timber gravel board. 

Constructing a structural slab needs calculating for thickness and steel content by a qualified structural engineer for the local ground conditions encountered on site.

This slab is made up of the following:

• A minimum of 150mm of C25 concrete is laid in bays 3.00m wide. Running in the opposite direction of play.
  
• The concrete to have a layer of A 142 steel mesh. The mesh to be no closer than 50mm to the surface.
  
• Between the concrete bays 20mm diameter steel bars must be inserted at one metre centres with one half in a plastic sleeve or coated with bitumen. These steel bars avoid curling during the curing period.
  
• When each bay has been laid to a satisfactory level the concrete should be left until nearly cured and then power floated.
  
• Upon completion of the power floating, the surface of the concrete must be sprayed with a moisture – curing product to avoid evaporation of the concrete.
  
• Upon completion of the concrete laying 25mm deep saw cuts must be created at ten metre centres running in the direction of play.
  
• Upon completion of all structural works the concrete screed must be tested using a three metre straight edge.
  
• The tolerances that should be achieved must be plus or minus 2mm under a three metre straight edge and plus or minus 5mm from datum.

• Excavate to required depth
  
• Compact and Trim
  
• Excavate and Lay Perimeter Drain using Perforated Plastic Pipe, backfill with gravel
  
• Lay Terram or similar (Geo-Fabric Membrane)
  
• Lay Edgings to Green Perimeter laid to a level to meet Bowls requirements
  
• Lay 150mm Type 1 MOT Frost Resistant Stone
  
• Roll and Compact
  
• Lay 20/30mm 6mm to dust granite stone
  
• Laser Grade to a Level, Compact and Roll
  
• Tolerance required to WORLD BOWLS specifications
  
• Form side ditches by laying Kerb Edgings 200mm from edge of playing area
  
• Form End Banks in Brick/Block Work 300mm from edge of playing area and to a finished height of Minimum 250mm above playing surface.

• Strip off existing surface to formation level
• Install drainage using 100mm perforated drainage pipe at 6m centre, wrapped in geotextile and covered in 20-25mm gravel.
• Connect drainage runs into 150mm collecting pipe.
• Backfill with 20-25mm gravel, discharge to suitable outlet.
• Cover formation level with non-woven geotextile.
• Install 150 x 50 flat top edgings to perimeter.
• Lay Dales bonded aggregate base 80- 100mm thick and laser grade to World Bowls tolerances.
• Laser grade 3 -5mm sharp sand to achieve final tolerances prior to underlay and carpet installation.