Roof repair in Sullivan, WI: we connect you with top-rated local roofers, checked by our team — their proposals come straight to your Homeshi account. Free for property owners.
Roofs in Sullivan take a beating — hail up to 2.75 inches across has been recorded in Jefferson County in the last 10 years.
In Jefferson County, July highs average about 82°F and January lows about 12°F, with roughly 36 inches of rain a year. Long, cold winters put furnaces and pipes to the test.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, hailstorms and floods in Jefferson County, with hail up to 2.75 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Jefferson County has had 8 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Storms, Tornadoes, And Flooding (2026).
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Look for missing or creased shingles, granules collecting in the gutters, dents on vents and flashing, and new stains on ceilings. A roofer can inspect it and photograph anything they find — book a call and add your photos.
Asphalt shingles usually last 20–25 years, tile and metal much longer.
These are Jefferson County figures — more about homes in Watertown.
Dousman · Summit · Oconomowoc · Palmyra · Oconomowoc Lake · Johnson Creek · Lac La Belle · Jefferson