Green Bay, WI · Flat Roof

Flat Roof Contractors in Green Bay, Wisconsin

Commercial or residential flat roof — compare local roofing companies. 27 local roofers listed.

Short answer: Flat and low-slope roofs in Green Bay 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 Green Bay: 6.4 heavy-rain days a year (1 inch+). Ask any roofer for a license number and a certificate of insurance.

Get a free quote See Green Bay in numbers
  • 6.4heavy-rain days a year (1 inch+)
  • 36.8 inrain a year
  • 0days a year at 90°F or hotter
  • 36%of homes are not single-family houses

How much life is left in my Green Bay roof?

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

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Flat and low-slope roofs in Green Bay 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 Green Bay 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.

Green Bay in numbers

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

  • #48of 209Green Bay ranks #48 of the 209 cities we cover for share of homes built before 1980.

Hail reports per year in the county

Hail events per year in the county, 2017 to 2026* 5 2017 1 2018 3 2019 6 2021 5 2022 3 2023 3 2024 2 2025 18 2026*
Hail events per year in the county, 2017 to 2026*
20175
20181
20193
20216
20225
20233
20243
20252
2026*18

46 recorded events across 8 full years plus 2026 to June represented in the data. 2021 had the most events among represented full years: 6.

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: 2020. 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 5, 2016

3 reports that day (3 wind); reported property damage $75,000; county FIPS 55009, 2014–June 2026

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

When storms hit Green Bay

Hail reports by month in the county, all years combined 0 Jan 0 Feb 6 Mar 10 Apr 3 May 11 Jun 1 Jul 11 Aug 7 Sep 0 Oct 0 Nov 0 Dec
Hail reports by month in the county, all years combined
Jan0
Feb0
Mar6
Apr10
May3
Jun11
Jul1
Aug11
Sep7
Oct0
Nov0
Dec0

Most hail reports come in June; the season runs March to September. Book inspections and repairs before that window, not after.

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

Roofing trade around Green Bay

  • 16 roofing companies with payroll in the county, employing about 229 people; 44% have fewer than 5 employees.
  • A roofer's median pay here is $59,320 a year (Green Bay, WI Metro Area).
Source: Census CBP · data as of 2023 Source: BLS OEWS, roofers · data as of May 2025

Green Bay storm record: Brown County

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

  • 1634Founded
  • 581 ft (177 m)Elevation

Where hail of 1 inch or more was reported in Brown 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 in hail1 in hail1.25 in hail1.25 in hail1.25 in hail1.25 in hail1.25 in hail1.25 in hail1.5 in hail1.5 in hail1.5 in hail1.5 in hail1.75 in hail1.75 in hail1.75 in hail1.75 in hail1.75 in hail2 in hail2.5 in hail Green Bay
  • 251 to 1.74 in
  • 71.75 to 2.74 in, golf ball to tennis ball
  • 02.75 in and up, baseball

Largest plotted stone: 2.5 in. Bigger dots are bigger stones.

32 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
September 7, 2021 2.5 in, about the size of a tennis ball 6 Wrightstown
June 24, 2026 1.75 in, about the size of a golf ball 7 Pulaski
March 30, 2026 1.75 in, about the size of a golf ball 5 Ashwaubenon
Source: NOAA Storm Events Database · data as of 2014–2026

Last big hail on record

June 24, 2026

Hail of 1.75 inches (golf ball) or larger fell on 5 days in 2014–2026. Our records end where NOAA's do, so a newer storm may not be listed yet.

Strongest tornado

EF0 · August 7, 2019

It stayed on the ground for 6.2 miles and was up to 90 yards wide. A tornado quickly formed southeast of the city of Green Bay and moved southeast into the town of Bellevue. Three power poles sustained damage and a business sign was heavily damaged in Green Bay. The tornado continued southeast and damaged at least 100 trees along the path (DI 27 and 28, DOD 1-3).

Strongest thunderstorm gust

75 mph · June 15, 2022

What it means for flat roof

Flat and low-slope roofs hold hail on the surface instead of letting it bounce. With 2.5-inch hail on record in Brown 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 Green Bay

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

That typical price is about 5.5% of the median Green Bay home value ($191,500).

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

Full Green Bay cost guide by material →

What Green Bay's climate means for flat roof

  • Flat and low-slope roofs in Green Bay must be engineered for snow load and kept drained — ponding under a melting snowpack is the top failure point here.
  • Green Bay'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 Green Bay, WI

27 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 Green Bay: questions

How do I find a flat roof company in Green Bay?
PickARoofer lists roofing companies serving Green Bay, 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 Green Bay?
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 Green Bay?
June is the worst month: 22% of the 49 hail reports NOAA holds for the county came then. Reports run from March to September. Book the inspection before March, while crews still have open dates.
How big does hail get near Green Bay?
The largest hail NOAA logged near Green Bay measured 2.5 inches, about the size of a tennis ball. Hail of an inch or more fell on 12 days in the same record. The biggest day was September 7, 2021, with 6 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 Green Bay, and does it matter for the roof?
The median home in Green Bay was built in 1971, and 66.8% 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 86 freeze-thaw days a year, which loosens flashing and sealant.
What does roofing cost in Green Bay?
For an average 2,000 sq ft home we model asphalt-shingle re-roof at $6,580 to $14,570 in Green Bay, around $10,600 in the middle. That is about 5.5% of the median home value of $191,500. Your quote moves with roof size, pitch and how many layers come off.
How many roofing companies work around Green Bay?
The Census Bureau counts 16 roofing companies with payroll in Brown County, employing about 229 people. 43.8% of them have fewer than five employees, so most quotes come from owner-run crews. A roofer's median pay is $59,320 a year (BLS).
How do I maintain a flat roof through Green Bay's winters?
Flat roof maintenance in Green Bay 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 Green Bay 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 Green Bay contractors, though it runs warmer than TPO and may require more frequent coating. Cost, pitch, and building type typically dictate the right choice — a Green Bay 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.