Shed Slabs in Wake Forest, NC

A shed slab looks like a small pour on paper, but the small details are what keep the shed dry and level ten years down the road. Wrong thickness and the anchor bolts pull loose in a windstorm. No gravel base and the slab sits in a bathtub every spring. No moisture barrier and the wood tools and lawn mower spend every summer breathing damp air. Four inches of concrete on four inches of compacted stone with a proper slope and a threshold that clears the door swing is a small pour that either holds or fails on the base prep, not the concrete.

Local Concrete Contractor pours shed slabs and outbuilding pads across North Carolina — 8x10 storage sheds, 10x12 workshops, 12x16 lawn-equipment barns, and pads sized for pre-fab buildings sold at every big-box store. Every job includes a site walk to check grade, drainage, and permit thresholds in your county. The spec — thickness, base depth, moisture barrier decision, anchor plan, edge detail, slope — gets written down before pour day. No deposit, no last-minute add-ons, no assumptions hidden in the number.

Our Shed Slab Services

Shed and outbuilding pads come in a small handful of common sizes, and the spec changes with what will actually sit on the slab.

• Standard shed pads — 8x10, 8x12, 10x10, 10x12, 10x14, 12x12, 12x16, 12x20 poured to the manufacturer's footprint
• Pre-fab building pads for the common big-box models where the manufacturer specifies pad size and anchor pattern
• Lawn-equipment barns and small storage buildings sized for zero-turn mowers, small tractors, or an ATV
• Playhouse and greenhouse bases where a thinner slab or a perimeter footing with gravel infill can be the right answer
• Generator pads and HVAC condenser pads — small pours with the same spec discipline as a shed
• Pool-equipment pads for pump, filter, and heater — often four inches with a lip to contain leaks
• Tie-in pads connecting a shed door threshold to an existing sidewalk or patio at correct elevation
• Thickened-edge pads for pre-fab buildings that specify anchor bolts around the perimeter
• Ribbon or split-strip pads where a full slab isn't needed and only the load lines matter

If you already have the shed on order, bring the pad-size specification from the manufacturer and we'll match it. If not, we'll size the pad against your door swing and the equipment you're storing.

Slab Spec — Thickness, Base, Moisture Barrier

The pour spec for a shed slab is short but every line matters. This is a slab that either holds up because of the base, or fails in the first spring because the base was skipped.

• Slab thickness — four inches is the working default for typical residential sheds and light-storage buildings. Five to six inches is what we spec if the shed will hold a tractor, ATV, or workshop equipment with point loads.
• Compacted gravel base — four inches of number 57 stone over compacted subgrade is the working default. On soft clay we go deeper. On well-drained sand we sometimes go lighter. The base is what keeps water from pooling under the slab.
• Moisture barrier — six or ten mil polyethylene under the slab whenever the shed will store wood, tools, ammunition, electronics, or anything moisture-sensitive. Skip it and the slab wicks ground moisture into the shed year-round.
• Reinforcement — wire mesh is legitimate for small shed slabs where the code allows it. Number-three or number-four rebar on twenty-four-inch centers is the upgrade for a workshop or equipment barn.
• Thickened edge — where the shed anchors down through the slab or where a pre-fab building specifies a perimeter bearing detail. Twelve inches deep by twelve wide is a common thickened-edge dimension.
• Slope — a one-eighth to one-quarter inch per foot slope from back to front keeps the interior dry when the door is open and rain is blowing in
• Anchor bolts or wedge-anchor pattern set into the wet pour to the manufacturer's spec so the shed ties down for wind loads

All of that shows up on the spec sheet you sign.