Calculate cubic yards, bags needed, and Madison WI-accurate ready-mix costs for driveways, patios, garage slabs, foundations & footings across Dane County and Greater Madison.
Enter project dimensions to calculate volume, bags, and estimated Madison WI material cost.
Use 5 in. for driveways. 4,000 PSI + 6% air entrainment required for all Madison exterior flatwork. Footings must be below 48 in. frost depth. Never use de-icing salts on new concrete in the first winter.
Patio 4–5 in · Sidewalk 4 in · Driveway 5–6 in · Garage 4–5 in · Footing 10–16 in (below 48 in. frost) · Foundation wall 8–10 in
Exterior flatwork minimum: 4,000 PSI + 5–7% air entrainment · Interior slabs: 3,500 PSI (no air required) · Frost depth: 48 in. — all footings must extend below · Driveway thickness: 5–6 in. minimum · W/C ratio: ≤ 0.45 for exterior exposed concrete · De-icers: never on new concrete in first 12 months · Curing: 7-day minimum, insulated curing blankets required for pours below 40°F. Always confirm with the City of Madison Building Inspection before starting permitted work.
A standard 20×20 ft driveway at 5 inches needs ~6.2 cu yd. At Madison pricing ($162–$180/yd for 4,000 PSI air-entrained), material runs $1,004–$1,116. Always specify 5–7% air entrainment — it is the single most critical ingredient for durable Madison exterior concrete. Avoid all chloride-based de-icers for the first full winter after placement.
Madison averages 100+ freeze-thaw cycles per year — water entering concrete micro-pores expands 9% when it freezes, causing progressive surface scaling and spalling. Air entrainment creates billions of tiny air bubbles that act as relief valves for this pressure. Any exterior concrete in Madison without 5–7% air will fail within 2–5 winters — no exceptions. Always ask your supplier to confirm air content at the truck before accepting any load.
All Madison footings must bear below the 48-inch frost depth required by Wisconsin SPS 321. Footings above frost depth will heave during freeze-thaw cycles, cracking foundations and structural walls. Madison's Dane County sandy loam over clay subsoil requires careful bearing verification. A licensed Wisconsin PE or structural engineer should review all foundation designs for new Madison construction.
Never pour concrete when air temperature is below 40°F and falling. For Madison's long shoulder seasons (Oct–April), use heated water in the mix, Type III accelerating cement, insulated curing blankets, and protect forms for a minimum 7 days. Fresh concrete must maintain 50°F for at least 72 hours to hydrate properly. Cold weather pours in Madison without protection produce low-strength, porous concrete that fails quickly under freeze-thaw stress. Consult ACI 306 Cold Weather Concreting for full Madison-applicable protocols.
| Mix Type / PSI | Madison Price / Cu Yd | National Avg | Best For | Air Entrained? | WI Code |
|---|---|---|---|---|---|
| 3,000 PSI | $142–$158 | $130–$148 | Interior slabs, basement floors only | Not Required | Interior Only |
| 3,500 PSI | $150–$168 | $138–$158 | Garage floors, protected interior slabs | Optional | Interior Only |
| 4,000 PSI — Air Entrained | $162–$180 | $148–$166 | All Madison exterior flatwork — standard | 5–7% Required | Compliant |
| 4,500 PSI — Air Entrained | $175–$195 | $160–$175 | Heavy driveways, structural, foundations | 5–7% Required | Compliant |
| 5,000 PSI — High Strength | $188–$215 | $172–$190 | Commercial, tilt-up, heavy structural | As Specified | Compliant |
| Cold Weather Surcharge | +$12–$22/yd | +$10–$20/yd | Heated mix water / accelerator (Nov–Mar) | Separate | Recommended |
City of Madison building permits, Wisconsin SPS 321, and cold-weather concrete standards for Dane County projects.
Apply for Madison building permits for driveways, foundations, retaining walls, and all structural concrete. The City of Madison Building Inspection Division enforces Wisconsin SPS 321 and requires permits and inspections for all structural concrete work including footings, foundation walls, and permitted driveways.
Visit Madison Building InspectionWisconsin SPS 321 (Wisconsin Uniform Dwelling Code) governs all residential concrete construction in Madison, including minimum PSI requirements, air entrainment mandates, frost depth requirements, and footing dimensions. All Madison residential concrete projects must comply with SPS 321 as enforced by the City of Madison and Dane County.
View Wisconsin SPS 321ACI 306 is the governing standard for cold weather concrete practices — essential for any Madison pour from October through April. It covers temperature thresholds, heated mix water protocols, accelerating admixtures, insulated curing blanket requirements, and quality control for concrete placed in below-freezing or near-freezing conditions common to Madison winters.
Visit ACI.org