tape, extension cord, and spray paint will be used to measure and mark the desired area
for your putting green. The lawn spray, weed killer, and weed barrier will be used to kill and
block vegetation from growing under your sub-base. The shovel, wheel barrow, and rake will
be used to move and spread the sub-base material. The garden hose, spray nozzle, ride-on
roller, lawn roller, or gas tamp will be used to compact the sub-base. A gas tamp, also
called a plate on roller compactor, will compact the sub-base much quicker than the lawn
roller. A ride-on roller can be rented for about $155 a day which
compacts the fastest. A lawn roller can be rented
for about $8 - $12 a day, and a gas tamp will cost about $20 - $30 a day to rent.
spreader and the push broom will be used to fill the putting green with sand. The small hand
shovel is used to dig the regulation holes in the sub-base. The utility knife will be used
to cut the holes out of the turf.
If you are installing your putting green on concrete, you need not be
concerned with the sub-base material.
The best sub-base consists of 4" of crushed rock (also known as Class
"A" rock) topped with 4" unwashed crushed limestone. The crushed stone
underlying sub-base should be clean and have no fines. However, most people
feel that 4" of crushed limestone, by itself, is adequate. The following materials
and instructions are based on installing a 4" sub-base of crushed limestone.
This is an unwashed crushed limestone compacted to form a solid foundation for your
golf putting green. It is known by several different names in different areas of the country. It
has been called:
- Granite crush and run
- Manufactured sand
- DG (disintegrated granite)
- Crushed fines
- Stone dust
- Limestone or limestone dust
Be sure that the crushed limestone is 1/4" minus. If 1/4" minus
is unavailable, you can get by with 3/8" minus. This means that no piece of stone is
larger than 1/4" or 3/8". You want the smaller, finer pieces of stone to help in
the compaction process. You will be able to find the stone at a local stone company, rock
quarry, or gravel pit at a cost of about $10-$15 per ton delivered. When calling, be sure
to tell them you must have stone that is NOT washed.
To determine how much sub-base you will need, use this formula: for every 12'x6' area (or
72 sq. ft.), you will need one ton of crushed limestone. For example, if you have a
12'x24' (or 288 sq. ft.) putting green, you will need 4 tons of stone. (four 12'x6' areas
or 288 divided by 72 = 4). You will need the same amount of stone for the
crushed rock, beneath the crushed limestone, if you choose to use both.
Sand-Fill for Polypropylene Putting Greens
White and black sandblasting sand (30 - 35 grit or medium): make sure it is
sandblasting sand and not all-purpose sand. If you can't find a 35 grit, then a 40 or 60
grit can be substituted. It will be a little bit finer sand and may take a little longer
to push into the turf. You will be able to find this sand at a local sandblasting supply
store for a cost of $4-$6 per 100lb. bag. For aesthetic purposes, 20% of the sand
you buy needs to be black or putting green sand.
To determine how much sand you will need, use this formula: The
Performance turf will take about 2.5 lbs of sand per sq. ft.; the 1"
Performance turf requires 5 lbs. of sand per sq. ft. For the Performance putting green, take your total square footage and
multiply it by 2.5 or 5. For example, a 12'x24' Performance
1/2" putting green is
288 sq. ft., so 288 x 2.5 = 720 or approximately 7-100 lb. bags of sand.