How to Plan a Slab for a Shed

Every shed will function better with a concrete slab. The concrete creates a surface for driving a riding lawn mower into the building, for example. Planning the framing is relatively simple, since only basic materials are required. Don't skimp on the amount of concrete used for actual construction, however, since a thin floor will crack more easily over time. A thinner base also makes the slab vulnerable to moisture from ground soil. Plan the construction of the slab carefully to look nice from all angles, since a shed may rest on top of the slab and leave the perimeter visible.

Measuring tools
Sketch pad
List of shed dimensions

Instructions

- 1
  Measure the yard space allowable for a shed. Sketch a basic slab, making sure it will not be near trees or plantings that will eventually grow large roots. Plan to build a framework using 2-by-8-inch boards lined with roll-type metal grid work, which will add strength to the concrete pour. Design the slab to fit the dimensions of the shed exactly, so select the shed model to be used before the slab is constructed.
- 2
  Locate digging tools to prepare yard space for the slab. Use a rotary tiller, for instance, to break up the soil. Acquire shovels for one or two workers to dig out the slab space. Plan to have a hoe, as well, since rocks might be in the way. Level the slab space to allow for a concrete base 8 inches deep that will be at least a couple of inches above surrounding soil. Pour the slab deeper than 8 inches, if needed, to allow for a surface slightly above ground level.
- 3
  Discuss all aspects of the pour with a concrete company. Talk with experts concerning the type of concrete needed for the pour, the costs involved, and special needs for allowing yard room for the delivery truck. Keep in mind that lawn flower beds or special plantings might dictate that wheelbarrows be used to fill the slab framework. Plan to hire workers to help with this, if needed.
- 4
  Plan to build the slab surface to shed water. Slope the top surface, when the slab is constructed, to shed water since extreme rain might cause standing water. Allow for a floor scrubbing from time to time, too. Design the flooring framework slightly higher on the front side by one-half inch. During the slab pour, utilize a 2-by-4-inch lumber board to finish the pour to a smooth texture.
- 5
  Design a landscaping border for the slab. Do this to allow for a bed of pebbles or mulch, for example, around the perimeter. Incorporate this border into the plan, so that lawn mowing will be easier near the shed. Install a border to keep weeds from growing near the new building, too. Design a border around the shed slab with a flat brick on the edge of the overall perimeter installed perfectly flat. Use this flat brick space for a lawn mower wheel to ride on.

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