Roofing in Sioux Falls
Sioux Falls roofs carry heavy snow in winter and face violent wind in summer. After major storms, many roofers come to town, and the city's licensing rules help you sort them out.
The city's roofing license
In Sioux Falls, contractors doing shingling, siding, or window and door replacement with no structural changes on one- and two-family homes and townhomes need the city's Residential Roofing & Repair license. It requires an exam, a $20,000 compliance bond and at least $300,000 of general liability insurance. Structural work needs the Residential Building Contractor license. Ask any roofer for their city license before you sign.
Snow and ice dams
NOAA's engineering weather data for Sioux Falls lists a 50-year ground snow load of 40 pounds per square foot and about 75 freeze-thaw cycles a year. Heat escaping into the attic melts snow on the roof, and the water refreezes at the cold eaves, forming ice dams that push water under shingles. Ask the roofer about ice and water barrier membrane at the eaves and valleys, and about attic ventilation and air sealing; a roof can't fix an attic that's leaking heat.
Wind
On the night of September 10–11, 2019, severe storms brought straight-line winds of 80 to 100 mph and three brief EF-2 tornadoes within Sioux Falls. During the May 12, 2022 derecho, straight-line winds of 50 to 70 mph were widespread, with gusts measured at 97 mph in Madison and 107 mph in Tripp. Wind damage usually starts at edges and ridges. Ask about the shingle's wind rating, how many nails per shingle, and how the starter strip and ridge cap will be installed.
After a storm
After big storms, door-to-door roofers arrive. Be cautious with anyone asking for a large deposit, pressuring you to sign that day, or asking you to sign over your insurance claim. Check the city license, get your own estimate, call your insurer and choose a roofer with a local address and references.
What a bid should include
Ask every roofer for the same details: tear-off, decking repair pricing, underlayment, ice and water barrier, flashing, ventilation, drip edge, shingle brand and line, permit and cleanup. Ask about both the manufacturer's warranty and the roofer's workmanship warranty, and who registers the manufacturer warranty.
Winter work
Shingles don't seal well in cold weather. If you're roofing late in the year, ask how the roofer handles cold-weather installation and sealing.