Concrete in a deep-frost city
Few climates are harder on concrete than Sioux Falls. NOAA lists a 50-year frost depth of 102 inches and about 75 freeze-thaw cycles a year. Water that soaks under a slab freezes and lifts it; water in surface pores freezes and flakes the top. Spring storms add runoff, with a 100-year rainfall rate of 3.5 inches per hour. This checklist covers what to do each season.
April and May: inspect the damage
- Walk every slab after the frost leaves the ground. Look for heaved sections, cracked corners, scaling and open joints.
- Note where water stands after rain; low spots freeze and heave next winter.
- Plan repairs for the construction season. Sioux Falls contractors book quickly in spring.
June through August: pour and seal
- Pour new concrete in mild weather if you can. Ask about air-entrained concrete, which resists freeze-thaw damage, and about base preparation and drainage.
- Seal cracks and joints with a flexible sealant.
- Apply a penetrating sealer if the contractor recommends it for your slab.
September and October: prepare for freeze
- Fill and seal cracks so water cannot get under the slab.
- Check downspouts and grading. Water should drain away from slabs and foundations.
- Mark slab edges along driveways so snowplows and snow blowers do not catch them.
November through March: winter care
- Shovel early, before snow packs into ice.
- Use de-icers carefully. Rock salt can damage young concrete; ask your contractor what is safe for your slab.
- Use sand for traction on steep driveways.
- Avoid metal ice chippers that spall the surface.
Permit fees
Many slab, driveway and patio projects need a building permit. The City of Sioux Falls' 2026 fee schedule charges $40.00 for residential work valued up to $4,000; above that the fee rises with valuation, for example $80.50 for a job valued at $9,001 to $10,000 and $140.50 for $19,001 to $20,000. Remodels and renovations are valued at the actual bid price.
Hiring a concrete contractor
The City of Sioux Falls requires a Residential Building Contractor license of anyone doing work on one- and two-family homes and townhomes that needs a building permit. The license takes a passing score on a code exam, a compliance bond and general liability insurance. Homeowners working on their own homes need no license but must get the permits. Ask for the license number and check it.
What a good quote says
- slab thickness and base material and depth;
- reinforcement;
- air entrainment and mix strength;
- joint spacing and finish;
- curing method and how long to stay off the slab.
Keep records
Keep pour dates, mix details and repair dates. In frost country, knowing how a slab was built explains how it fails.