Oshkosh, WI · Flat Roof

Flat Roof Contractors in Oshkosh, Wisconsin

Commercial or residential flat roof — compare local roofing companies. 22 local roofers listed.

Short answer: Flat and low-slope roofs in Oshkosh are usually TPO ($5.50–$9 a sq ft installed), EPDM ($4.50–$8) or modified bitumen ($3–$7); the membrane lasts 15–25 years, mostly decided by how well the drains are kept clear. In Oshkosh: 5.1 heavy-rain days a year (1 inch+). Ask any roofer for a license number and a certificate of insurance.

Get a free quote See Oshkosh in numbers
  • 5.1heavy-rain days a year (1 inch+)
  • 36.1 inrain a year
  • 2days a year at 90°F or hotter
  • 40%of homes are not single-family houses

How much life is left in my Oshkosh roof?

Typical lifespans are published ranges for each material; for a Oshkosh house, real life also depends on installation, attic ventilation and the weather Oshkosh gets.

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Flat and low-slope roofs in Oshkosh must be engineered and maintained for snow load — pooling meltwater under a heavy snowpack is the leading cause of membrane failure here, and drain clearing each fall is not optional. Common flat roof systems in Oshkosh include TPO (heat-welded, energy-efficient), EPDM (durable rubber membrane), and modified bitumen — each with different cost, longevity, and maintenance profiles worth discussing with a local contractor.

Oshkosh in numbers

Public records for Oshkosh and its county, not estimates. Each figure shows its source.

  • #196of 209Oshkosh ranks #196 of the 209 cities we cover for largest hailstone on record (low end).
  • #175of 209Oshkosh ranks #175 of the 209 cities we cover for damaging thunderstorm-wind days (low end).
  • #158of 209Oshkosh ranks #158 of the 209 cities we cover for hail days of 1 inch or more (low end).

Hail reports per year in the county

Hail events per year in the county, 2017 to 2026* 1 2017 2 2018 4 2020 2 2021 2 2023 1 2024 1 2025 2 2026*
Hail events per year in the county, 2017 to 2026*
20171
20182
20204
20212
20232
20241
20251
2026*2

15 recorded events across 7 full years plus 2026 to June represented in the data. 2020 had the most events among represented full years: 4.

2026 covers only January to June: NOAA's file ends there, so it is not counted as the worst year or in the yearly average. Years without a data row: 2019, 2022. Missing rows are not treated as zero; no annual average is shown.

Source: NOAA hail events, county level · data as of 2017–2026*

Costliest storm day on record

Jun 14, 2017

5 reports that day (4 wind, 1 tornado); reported property damage $10,000; county FIPS 55139, 2014–June 2026

Source: NOAA Storm Events · data as of 2014–June 2026

When storms hit Oshkosh

Hail reports by month in the county, all years combined 0 Jan 0 Feb 0 Mar 5 Apr 0 May 6 Jun 2 Jul 7 Aug 2 Sep 2 Oct 0 Nov 0 Dec
Hail reports by month in the county, all years combined
Jan0
Feb0
Mar0
Apr5
May0
Jun6
Jul2
Aug7
Sep2
Oct2
Nov0
Dec0

Most hail reports come in August; the season runs April to October. Book inspections and repairs before that window, not after.

Source: NOAA Storm Events · data as of 2014–June 2026

Roofing trade around Oshkosh

  • 18 roofing companies with payroll in the county, employing about 70 people; 78% have fewer than 5 employees.
  • A roofer's median pay here is $58,880 a year (Oshkosh-Neenah, WI Metro Area).
Source: Census CBP · data as of 2023 Source: BLS OEWS, roofers · data as of May 2025

Oshkosh storm record: Winnebago County

What the National Weather Service logged in Winnebago County in 2014–2026. County level, because storm reports are filed by county, not by city limits.

  • 1818Founded
  • 791 ft (241 m)Elevation

Where hail of 1 inch or more was reported in Winnebago County

1 in hail1 in hail1 in hail1 in hail1 in hail1 in hail1 in hail1 in hail1 in hail1 in hail1 in hail1 in hail1 in hail1.5 in hail Oshkosh
  • 141 to 1.74 in
  • 01.75 to 2.74 in, golf ball to tennis ball
  • 02.75 in and up, baseball

Largest plotted stone: 1.5 in. Bigger dots are bigger stones.

14 reports of 1 inch or larger have coordinates. Each dot is a reported location, not a storm path.

Sources: NOAA, Census county outline

Biggest hail days

DateLargest hailReports that dayWhere it was reported
August 1, 2014 1.5 in, about the size of a ping-pong ball 2 Winchester
April 12, 2014 1 in, about the size of a quarter 2 Pickett
August 14, 2015 1 in, about the size of a quarter 2 Larsen
“Quarter size hail fell near the intersection of Highway 76 AND Country Highway II.”
National Weather Service report, August 14, 2015
Source: NOAA Storm Events Database · data as of 2014–2026

Strongest tornado

EF0 · June 20, 2020

It stayed on the ground for 3.37 miles and was up to 75 yards wide. Multiple eyewitness reports of a tornado over Lake Winnebago 5 to 6 miles southeast of Oshkosh Wittman Field Airport. The tornado dissipated before reaching shore.

Strongest thunderstorm gust

81 mph · July 28, 2021

Thunderstorm winds downed numerous trees and power lines in Omro.

What it means for flat roof

Flat and low-slope roofs hold hail on the surface instead of letting it bounce. With 1.5-inch hail on record in Winnebago County, ask what membrane and cover board the contractor specifies.

Storm data: NOAA Storm Events (public domain). City facts: Wikidata (CC0).

What it costs in Oshkosh

Asphalt-shingle re-roof, 2,000 sq ft home, adjusted for Oshkosh labor and material prices. Your quote depends on roof size, pitch and scope.

That typical price is about 6.3% of the median Oshkosh home value ($168,400).

Source: Census ACS (Oshkosh city) · data as of 2019–2023

Full Oshkosh cost guide by material →

What Oshkosh's climate means for flat roof

  • Flat and low-slope roofs in Oshkosh must be engineered for snow load and kept drained — ponding under a melting snowpack is the top failure point here.
  • Reflective TPO or a white coating earns its premium in Oshkosh, where dark membranes absorb punishing heat and age years faster.
  • Oshkosh's freeze-thaw cycling works open membrane seams and flashing laps — heat-welded TPO seams outlast taped or adhered ones in this climate.

Roofers in Oshkosh, WI

22 listed, first 20 shown. Roofers we verified against a public registry come first.

This list covers roofing companies generally. Confirm flat roof experience, materials, insurance and current availability with each company. A Verified badge refers to the registry check, not a confirmed specialty.

Flat Roof in Oshkosh: questions

How do I find a flat roof company in Oshkosh?
PickARoofer lists roofing companies serving Oshkosh, WI. This is a general roofing directory; confirm flat roof experience and availability with each company. A Verified badge describes a separate registry check, not a confirmed service specialty or insurance check. Confirm scope, insurance and availability directly. Requests go to one contractor at a time, with up to three attempts; a response or start date is not guaranteed. Free for homeowners.
Should I repair or fully re-roof in Oshkosh?
Ask a roofer to document the damage and compare a written repair scope with a replacement estimate. Roof condition, remaining life, materials and the extent of damage affect the decision. Confirm any inspection fee before booking.
When is hail season in Oshkosh?
August is the worst month: 29% of the 24 hail reports NOAA holds for the county came then. Reports run from April to October. Book the inspection before April, while crews still have open dates.
How big does hail get near Oshkosh?
The largest hail NOAA logged near Oshkosh measured 1.5 inches, about the size of a ping-pong ball. Hail of an inch or more fell on 10 days in the same record. The biggest day was August 1, 2014, with 2 reports. The National Weather Service calls hail of 1 inch or larger severe; the bigger the stone, the more likely it is to crack a shingle.
How old are the homes in Oshkosh, and does it matter for the roof?
The median home in Oshkosh was built in 1972, and 59.3% of homes date from before 1980 (Census ACS). A roof on a home that old has often been re-covered at least once, so ask the roofer whether there is a second layer underneath: it changes the tear-off cost. The area sees about 92 freeze-thaw days a year, which loosens flashing and sealant.
What does roofing cost in Oshkosh?
For an average 2,000 sq ft home we model asphalt-shingle re-roof at $6,580 to $14,570 in Oshkosh, around $10,600 in the middle. That is about 6.3% of the median home value of $168,400. Your quote moves with roof size, pitch and how many layers come off.
How many roofing companies work around Oshkosh?
The Census Bureau counts 18 roofing companies with payroll in Winnebago County, employing about 70 people. 77.8% of them have fewer than five employees, so most quotes come from owner-run crews. A roofer's median pay is $58,880 a year (BLS).
How do I maintain a flat roof through Oshkosh's winters?
Flat roof maintenance in Oshkosh centers on drainage: clear drains and scuppers each fall before the first snow. Ponding meltwater under a deep snowpack is the leading cause of membrane failure here — water weighs 5.2 pounds per square foot per inch of depth, and even a few inches of standing water adds significant unplanned load. After heavy snow events, a professional roof rake or heating cables at the drain area prevent the most dangerous pooling. Annual spring inspections after snowmelt catch seam and flashing damage before it compounds.
What is the difference between TPO, EPDM, and modified bitumen for Oshkosh properties?
TPO (thermoplastic polyolefin) uses heat-welded seams and a white reflective surface — the current industry standard for new commercial and residential flat roofs, best for energy efficiency. EPDM (ethylene propylene diene monomer) is a rubber membrane installed with taped or adhesive seams — very durable and forgiving, widely used on residential flat roofs for decades. Modified bitumen is a reinforced asphalt sheet applied by torch or cold adhesive — economical and familiar to many local Oshkosh contractors, though it runs warmer than TPO and may require more frequent coating. Cost, pitch, and building type typically dictate the right choice — a Oshkosh flat-roof specialist can walk you through the tradeoffs for your specific structure.
Do I need a permit for flat roof in Wisconsin?
Permit requirements depend on the property, scope of work and local jurisdiction. Check with the city or county building department and confirm who will obtain any required permit before work starts.

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Figures above: NOAA Storm Events Database (hail, wind, tornado; county of the city, 2014–2026), U.S. Census Bureau American Community Survey 5-year estimates (housing), NASA POWER (temperature and rain, 2014–2023). Prices: our published price method. How we collect data.