Hybridgrass Installation

STEP 1

Prepare lower rootzone layer;

  • Levels. Maximum allowed undulation
    < 10mm measured under 3 meter straight edge at 3 meter intervals in longitude and lateral direction;
  • Soil stability > 1,5N/mm² measured by penetrometer (cone 1 cm²)
  • Soil fertility level in accordance with applicable climate zone, type of grass and watering regime;
  • Granulometry of the lower rootzone in accordance with HYBRIDGRASS specifications.
  • Sprinkler heads will need to be levelled at 20mm above finished lower rootzone level. Ensure the surrounding soil is evenly compacted;

STEP 2

Clear the field runoff areas / perimeter of obstacles and waste. Allow 3 meters clearance at one side of the field to place the HYBRIDGRASS rolls;

STEP 3

Unload the HYBRIDGRASS rolls with 4m long carpet pin and transport the rolls to the cleared area beside the field. Ensure no vehicles traverse the prepared and levelled lower rootzone layer within the playing field contours and the runoff areas that will be fitted with HYBRIDGRASS carpet;

STEP 4

Set out the corner points of the area that will be fitted with HYBRIDGRASS carpet. Allow an excess of +150mm to all sides, drill in a solid marker pin at each corner and fit a yellow or white string line between each marker pin; 

STEP 5

Set out the corner points of the area that will be fitted with HYBRIDGRASS carpet. Allow an excess of +150mm to all sides, drill in a solid marker pin at each corner and fit a yellow or white string line between each marker pin; 

STEP 6

Unroll the carpet using a tractor mounted equator at the 3 point linkage of a 40HP tractor or use a roller wheel device at the front link of a 20-30HP tractor. All tractors to be fitted with wide turf tyres;

STEP 7

The first roll is manually to be moved into position at one side to meet the string line that marks the outer perimeter of the carpet + 150mm. ensure the carpet is gently stretched lengthways ensuring no wrinkles appear;

STEP 8

Manually turn over 400 mm of the carpet edge on the side of the direction of installation (side B) of the first roll (and each consecutive roll) and cut clean the excess backing up to the first tuft line without artificial turf fibres fitted. This strip of cleared backing will act as the carrier tape for the carpet adhesive;

STEP 9

Unroll the second roll and manually bring the carpet into position whereby the outer tuft line will be covering the previously cleared adhesive carrier strip. Ensure all wrinkles are stretched;

STEP 10

Manually turn over 400 mm of the carpet edge on the side opposite of the direction of installation (side A) of the first roll (and each consecutive roll) and cut clean the excess backing up to the first tuft line without artificial turf fibres fitted. This strip of cleared backing will act as the carrier tape for the carpet adhesive;

STEP 11

Prepare the 1 component PU carpet adhesive. Only use adhesive specified for HYBRIDGRASS. Gently mix the adhesive in the tub and pour into the HYBRIDGRASS Adhesive Applicator (HAA). Fill the bucket to ¾ of the available volume;

STEP 12

Place the HAA into position at the outer edge of the adhesive carrier strip, pointing the triangle shape into the direction of the application. Open the gate valve at the rear of the HAA and start walking the HAA over the adhesive carrier strip in such a way that the adhesive is dispersed over this strip. The amount of adhesive applied onto the strip can be altered by opening and closing the gate valve and the speed of walking. The viscosity of the adhesive is depending on ambient temperatures and will dictate the settings of the HAA.

STEP 13 and 14

Ensure the level of the adhesive in the bucket of the HAA remains at required level with a minimum fill of 10%;

If weather conditions dictate, the adhesive carrier strip and the adhesive itself will have to be sprayed with a mist of water to improve the curing time of the adhesive;

STEP 15

When the adhesive feels ‘sticky’ the prepared carpet (10.) will be gently unfolded and moved onto the adhesive ensuring both tuft lines match perfectly

STEP 16

After closing the seam it will have to be rolled by using a specific HYBRIDGRASS Carpet Roller (HCR). The timing and intensity of the rolling is depending on the weather conditions. After both carpets have been joined the adhesive will have to be checked every 10 minutes by gently lifting the edge of top carpet. Once the bottom carpet is no longer coming loose from the top carpet the rolling will commence. Roll the seam twice in a gentle pace and ensuring no wrinkles appear in front of the HCR;

STEP 17

Allow for sufficient curing time (6-12 hours) before the carpet is ready to receive the infill. Check the seams and repair any loose seams with HATKO repair glue in cartridges;

STEP 18

Repeat steps 8. to 17. until the complete field has been covered by HYBRIDGRASS carpet;

STEP 19

Fold back the HYBRIDGRASS carpet for 1 meter following the outer perimeter of the field;

STEP 20

Excavate a shallow trench (100mm wide and 150mm deep) at one goal end and one side lengthways of the field. Trench along the inside of the string line and place the spoil on the outside of the string line. Unfold the carpet, place in the trench and stretch whilst backfilling with the spoil that was deposited beside the trench. Compact the trench by tractor tyre and re-level the soil;

STEP 21

Start the carpet infill procedure by preparing the infill or ordering in premanufactured infill. Deposit the infill on a clean hard surface as close as possible to the field entry. Ensure the material is dry and keep sufficient amount of plastic liner available to cover the infill in case of rain;

STEP 22

Load the infill in the hopper of a specialist sports field top-dresser, either tractor mounted or fitted as attachment to a Guzman or JD Gator type of vehicle. All equipment has to be fitted with low ground pressure turf tyres. The maximum weight should not exceed 1500 kg per load. Spread the infill in layers of maximum 6mm over the contours of the field ensuring an even spread either by drop spreader or rotary spreader;

STEP 23

Use a tractor mounted HYBRIDGRASS Infill Brush (HIB) to gently brush in the infill in the carpet whilst exposing the artificial turf fibres. Start brushing in the counter direction of the direction of the fibres in the longitude direction of the carpet. Use a hydraulic top-link attachment to the tractor in order to easily adjust the level of the brush to the surface;

STEP 24

After all infill has been dispersed in the carpet and fibres have been exposed the next application of infill can be spread by repeating 22. and 23.;

STEP 25

Complete the infill to an overall depth of 35mm measured with an infill tester;

STEP 26

Ensure the connection to the surrounding runoff area is level and without any obstacles or ridges;

STEP 27

After reaching an infill level of approximately 25-30mm the carpet on the remaining two sides of the field that had not yet been fixed in the soil can be fixed according the procedure as specified in 20.;

STEP 28

Expose any irrigation sprinkler heads by placing a X in the carpet of approximately 100 x 100mm from the centre of the sprinkler head and fold down the carpet adjacent to the sprinklers. Mark the sprinkler by tagging with a sprinkler flag and digitally survey the location of each sprinkler head prior to the HYBRIDGRASS installation; 

STEP 29

Apply the start fertiliser based on soil chemical analysis and prepare the seedbed;

STEP 30

Drill in the grass seed by using a specialist tractor mounted spike-seeding device, Redexim Speedseed or Blec Multiseeder or equivalent.

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