Foundations That Work

A solid, level foundation is the difference between doors that swing perfectly and doors that rub. This page helps you choose the right base for your site and walk through a proven build sequence.

Outcome: A level, square, well‑drained foundation (skids on gravel, concrete piers, or slab) that matches your plan.

Foundation Options (Pick What Fits Your Site)

skids easyshedplans.com

Skids on Compacted Gravel (most DIY‑friendly)

Best for: Level to mildly sloped yards, good drainage, fast builds

What it is: A compacted gravel pad with pressure‑treated skids supporting the floor

Why people choose it: Quick, affordable, movable, no concrete curing

Concrete Piers (great on slopes or frost‑heavy regions)

Best for: Sloped sites, clay soils, deeper frost lines

What it is: Concrete footings/tubes at set points with adjustable anchors or post bases

Why people choose it: Positive bearing at known points, height adjustability

concrete piers
slab on grade

Slab on Grade (clean and permanent)

Best for: Flat sites, mower/ATV storage, sweeping, and hose‑down convenience

What it is: A reinforced concrete pad with anchor bolts

Why people choose it: Integrated floor, ultra‑rigid base, easy to roll in equipment

How to Choose (Quick Guide)

Drainage: If water lingers after rain, prefer piers or raise the gravel pad higher.

Slope: More than ~6 in drop across the shed width often points to piers.

Use case: Heavy rolling loads (rider mower, ATV) favor a slab.
Budget & speed: Skids on gravel are typically the fastest and most cost‑effective.

Build the Gravel Pad (Skid Foundation)

A reliable baseline method shown for a 10×12; scale to your size.

1. Prepare the area
Strip sod 12–18 in beyond the footprint; remove roots/organic matter.
Rake relatively flat; shoot elevations with a line level or laser.

2. Set forms (optional but helpful)
Use 2×4 or 2×6 screed rails temporarily to guide the level.

3. Add and compact gravel
Use 3/4‑in minus (well‑graded). Place in 2 in lifts; compact each lift.
Aim for 3–4 in compacted thickness minimum; add more to raise above the surrounding grade.

4. Level and crown
Pull a slight crown toward the middle (≈1/2 in) so water runs to edges.
Confirm level side‑to‑side and corner‑to‑corner.

5. Place skids
Typical: two or three pressure‑treated 4×4 or 4×6 skids running the long direction.

6. Space skids equally under joists per your plan. Shim only with treated, solid material if required.
Re‑check square
Measure both diagonals; adjust skids until equal.

gravel pads easyshedplans.com
piers layout

Concrete Pier Layout (Overview)

1. Plan the grid
Mark pier locations per span requirements. Common starting grids:
8×10: 2 rows × 3 piers (≈ 6 total)
10×12: 2 rows × 4 piers (≈ 8 total)
12×16: 3 rows × 4 piers (≈ 12 total) Adjust to your plan’s joist span and skid/beam size.

2. Set strings and mark centers
Use batter boards beyond corners; square lines; mark pier centers with paint.

3. Dig to frost depth
Bell or enlarge bases where required; keep holes plumb.

4. Pour and set tubes
Use footing at base if required, then set form tubes. Finish tops to a leveled string line.

4. Install anchors or post bases
Set embedded anchors while green or drill/epoxy later as specified.

Level, Square, and Drainage Checks

Level: Within 1/4 in across the footprint.

Square: Diagonals match; walls and floor will go faster.
Drainage: Surrounding grade slopes away; no low pockets near edges.

Checklist card prompt: “A small ‘Foundation Checks’ card with three checkboxes: Level, Square, Drainage. Simple icons, white background.”

Materials & Tools (Foundation Stage)


Base. 3/4‑in minus gravel, landscape fabric (optional)
Lumber. PT 4×4 or 4×6 skids, stakes, temporary forms
Concrete. Form tubes, mix or ready‑mix order, anchors/post bases
Tools. Plate compactor or hand tamper, shovel, rake, level/laser, string line, saw
Safety. Glasses, hearing protection, gloves, boots

prep for shed easyshedplans.com
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EASY Step‑by‑Step Build

Follow the sequence or jump to the step you need.

  1. Planning, Codes, and Site Prep
  2. Foundations that Work
  3. Floor Framing and Sheathing
  4. Wall Framing
  5. Siding and Weather‑Resistive Details
  6. Doors and Windows
  7. Roof: Choose Your Style
  8. Rafters, Trusses, and Fascia
  9. Roof Sheathing and Roofing
  10. Ventilation, Trim, and Final Details
  11. Troubleshooting and Pro Tips
  12. FAQs

Troubleshooting

Pad looks level, but doors stick later: Re‑check square; shim skids to remove twist before floor sheathing.

Water puddles at edges: Add gravel to raise the pad; feather the surrounding grade away.

Piers not in plane: Snap a reference line on blocks/tubes and grind or shim with approved materials.

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