Shed Flooring Options: Concrete, Plywood, Boards & Finishes Compared

The right floor carries the load, resists moisture, and matches the shed's purpose. Choose wisely—retrofitting is painful.

1. Concrete Slab (Gold Standard for Durability)

• Finish: Broom (non-slip, dust traps) vs. Steel trowel (smooth, easy sweep) vs. Polished (sealed, stain-resistant).
• Seal/Paint: Penetrating silane/siloxane sealer or epoxy paint — prevents dusting, resists oil/chemicals.
• Best For: Heavy equipment, vehicles, wet uses, permanent shops.
• Caution: Cold, hard on feet; add foam mats for standing work.

2. Tongue-and-Groove Plywood (¾" T&G)

• Interlocking edges = unified diaphragm; no telegraphing gaps.
• Glue (construction adhesive) + screw (1⅝" deck screws, 8" OC) to joists.
• Seal edges & face with oil-based primer + porch paint or epoxy.
• Best For: General storage, workshop, potting shed.

3. Pressure-Treated Plywood (¾" T&G or Square-Edge)

• Resists rot/decay if ground moisture wicks up.
• Essential for ground-contact skids or high-humidity regions.
• Same install as above; can be left unsealed (but seal anyway).

4. Solid Wood Boards (Pine, Cedar, Douglas Fir)

• 1×4 to 1×6, square-edge or T&G.
• Nail/screw to joists; gaps allow drainage (dirt falls through).
• Stain/seal or leave raw (rustic).
• Best For: Light storage, aesthetic priority, historic match.

5. Vinyl / Linoleum Over Plywood (Author's Favorite)

• Install ¾" T&G plywood → roll out commercial sheet vinyl (heat-weld seams).
• Waterproof, chemical-resistant, effortless cleanup, warm underfoot.
• 10–15 year life; replaceable without subfloor damage.

6. OSB (Oriented Strand Board) — Avoid If Possible

• Swells at edges; holds dust in texture; weak fastener grip; formaldehyde concerns.
• Only if budget forces it — paint all sides/edges, expect 5–7 yr life.

Decision Matrix

Use	Best Floor	Budget Alt
Lawn mower, tiller, wet boots	Concrete + sealer	PT plywood + vinyl
Workshop, standing work	T&G plywood + epoxy paint	T&G plywood + vinyl
Potting shed, damp	PT T&G plywood + vinyl	Concrete
Dry storage, light	T&G plywood + paint	Boards
Cabana, office, finished	T&G plywood + vinyl/laminate	Concrete + sleepers + subfloor

Invest in the floor. Everything else rests on it.