Best Shed Slab Contractors Chapel Hill NC

The shed pad is a small pour that punishes shortcuts. Out-of-square by an inch and the kit walls fight you; out of level and every door in the building swings itself. On this town's sloped, wooded lots we add two site problems to that list: the uphill edge of a benched pad intercepts the hill's drainage and needs a path to send it around, and the surrounding trees drop enough litter to keep an unsealed slab edge damp year-round. We handle both in the design, cast anchor points to the shed maker's layout, and set the finished floor high enough that storm runoff never gets a vote on what you store inside.

In Chapel Hill specifically, shed slab work runs through neighborhoods like Glen Lennox, Northside, Franklin-Rosemary Historic District. Chapel Hill lots are steeper and more wooded than most of the Triangle, and that changes concrete work: driveways often need thicker edges and washout-resistant base on grades, and tree protection matters during demolition. That local ground truth — not a generic spec sheet — is what the crew builds against when they form up a Chapel Hill slab pour.

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.