Blinder / Bunker Liner
The aim of the whole Blinder process is to provide simple guidelines to achieve the goal for all parties involved. The Blinder can be installed into new and existing bunkers! The aim of the team is to provide the customer with the best solution for there situation.
- Excellent bunkers
- Free of contamination
- Well drained
- Minimum wash in heavy rain
- The right amount of sand easily distributed across the bunker!
Existing bunker preparation Guide for Blinder installation
All sand to be removed. Firm consolidated sub base at a depth adequate for Blinder Liner at 25mm and sand layer 75-100mm (3-4") to be below the bunker/turf edge. Turf Edge of the bunker undercut enough to allow the Blinder Liner to be laid underneath to protect edge of Blinder and minimise contamination from soils. Adequate drainage through the base of the bunker ideally to positive outfalls.
Sub Base Construction
A good firm sub base is essential to any bunker construction. If this cannot be achieved through using the natural sub soil then it would be ideal to line the base with 50mm of type 1 scalping to create the base. At construction stage a shelf can be created approximately 300mm wide around the edge of the entire bunker, so the Blinder can be laid up the face and out of the bunker. This is for a number of reasons! it will give a ledge for the 3 turf revetment to sit on that acts as a contamination barrier and ensures you know where the original bunker edge is, as this can get lost over years of bunker maintenance.
The drains should be in the lowest sections of the bunker, draining ideally to a positive outlet at 1:100 fall. Sub base shaped towards drains so no water lies in the base. Pipe size should be adequate and a 6-10mm gravel over the top at a reasonable depth. A flush point is a very useful addition to the bunker and greatly helps minimise silt build up by flushing through at anytime or ideally before autumn/winter, just prior to irrigation shut down. This is made by bringing the drainage pipe up and out of the bunker to a point at the edge where a small circular plastic lid can be placed over the top, level with the turf surface allowing easy access for drainage maintenance.
- Firm base
- Bunker faces, MAX 35˚
- Bases shaped to maximise drainage
- Drainage to a positive outfall
- Flush points for drainage maintenance
- Ledge construction for reduced contamination
Blinder Bunker liner Installation
- Team arrive and install
- It will take up to 4 days for the base to set (bunker protected with rope, fencing and signage)
- Contamination barrier can then be laid around ledge of the bunker over blinder, 3 turf revetment is ideal out cut to ½ turf cutter width, 150mm approx
- The remaining shaping of the bunker can then be undertaken by building up soil behind revetment and final shaping of turf
- Any contamination can easily be swept off Blinder then washed off and it is ready to sand
The sand should meet USGA specification and be evenly distributed at 75-100mm depth. Tipping of the sand from the edge of the bunker is preferable or using wheelbarrows. If the bunkers are particularly large and utility vehicles have to be used then protection to product should be provided at entry points and vehicle not to be heavily loaded! The product is extremely strong and flexible unlike other bunker lining products! Sand can be padded down to consolidate if needed.