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How Much #57 Stone for an 8x8 Greenhouse Floor?

How much #57 stone for an 8x8 greenhouse floor: about 0.8 tons at 3 inches deep. The area is 64 square feet, which is 0.59 cubic yards at that depth.

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The math

  1. Area: 64.0 sq ft.
  2. Depth in feet: 3 ÷ 12 = 0.250 ft.
  3. Cubic yards: 64.0 × 0.250 ÷ 27 = 0.59 yd³.
  4. Tons: × about 1.35 tons per yard = 0.8 tons.

The crushed stone calculator does this for any size.

#57 stone needed by depth

DepthCubic yardsTons of #57 stoneTons +10%
2 in0.400.50.6
3 in0.590.80.9
4 in0.791.11.2
6 in1.191.61.8

Building the greenhouse base

Greenhouse floors need to drain. A few inches of washed stone over landscape fabric keeps roots and weeds down and dries quickly after watering. Avoid stone with a lot of fines, which can turn muddy.

Before the stone goes in

Clear vegetation, rake the soil level and compact it. Lay fabric overlapped at the seams and set edging before spreading the stone.

Getting it delivered

Small dump trucks commonly carry around 5 to 10 tons and tri-axles more, but loads vary by truck and state, so ask the yard what fits in one trip. #57 is a washed stone of roughly 1/2 to 1 inch with few fines; it drains fast but stays a little loose on its own. Round up by about 10 percent for compaction and uneven ground.

Planning the cost

Quarries and landscape suppliers set their own prices, and they change by region and season. Get the price per ton, the delivery fee and the minimum order. If two products will both work, compare cost per square foot at your depth rather than cost per ton.

Tools for the job

A flat shovel, a steel rake, a wheelbarrow and a rented plate compactor cover most residential pads. A landscape rake or the back of a rake levels the top layer, and a long straightedge or a level string shows high and low spots before the final pass.

Questions people ask

How many tons of #57 stone for an 8x8 greenhouse floor?

About 0.8 tons at 3 inches deep.

How many yards of #57 stone for an 8x8 greenhouse floor?

About 0.59 cubic yards.

How many tons of #57 stone are in a cubic yard?

Roughly 1.35 tons for planning, but suppliers vary with stone size and moisture.

Should I put landscape fabric under the stone?

On soft or clay soil, a woven geotextile keeps stone from sinking into the dirt and makes the layer last longer.

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