Mankato, MN · Flat Roof

Flat Roof Contractors in Mankato, Minnesota

Commercial or residential flat roof — compare local roofing companies. 25 local roofers listed, 12 verified.

Short answer: Flat and low-slope roofs in Mankato 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 Mankato: 4.9 heavy-rain days a year (1 inch+). 12 of the roofers below have a license we checked; for any other, ask for a license number and a certificate of insurance.

Get a free quote See Mankato in numbers
  • 4.9heavy-rain days a year (1 inch+)
  • 34.1 inrain a year
  • 9days a year at 90°F or hotter
  • 46%of homes are not single-family houses

How much life is left in my Mankato roof?

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

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Flat and low-slope roofs in Mankato 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 Mankato 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.

Mankato in numbers

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

  • #36of 209Mankato ranks #36 of the 209 cities we cover for largest hailstone on record.
  • #170of 209Mankato ranks #170 of the 209 cities we cover for damaging thunderstorm-wind days (low end).
  • #162of 209Mankato ranks #162 of the 209 cities we cover for yearly rainfall (low end).

Hail reports per year in the county

Hail events per year in the county, 2017 to 2026* 4 2017 2 2019 4 2020 6 2021 13 2022 3 2023 1 2024 4 2025 8 2026*
Hail events per year in the county, 2017 to 2026*
20174
20192
20204
20216
202213
20233
20241
20254
2026*8

45 recorded events across 8 full years plus 2026 to June represented in the data. 2022 had the most events among represented full years: 13.

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: 2018. 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 16, 2014

7 reports that day (7 wind); reported property damage $610,000; county FIPS 27013, 2014–June 2026

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

When storms hit Mankato

Hail reports by month in the county, all years combined 0 Jan 0 Feb 0 Mar 20 Apr 12 May 15 Jun 6 Jul 12 Aug 3 Sep 0 Oct 0 Nov 0 Dec
Hail reports by month in the county, all years combined
Jan0
Feb0
Mar0
Apr20
May12
Jun15
Jul6
Aug12
Sep3
Oct0
Nov0
Dec0

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

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

Roofing trade around Mankato

  • 7 roofing companies with payroll in the county; 43% have fewer than 5 employees.
  • A roofer's median pay here is $50,250 a year (Mankato, MN Metro Area).
Source: Census CBP · data as of 2023 Source: BLS OEWS, roofers · data as of May 2025

Mankato storm record: Blue Earth County

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

Where hail of 1 inch or more was reported in Blue Earth 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 in hail1 in hail1 in hail1 in hail1 in hail1.25 in hail1.25 in hail1.25 in hail1.25 in hail1.25 in hail1.5 in hail1.5 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 hail1.75 in hail1.75 in hail1.75 in hail1.75 in hail2 in hail2 in hail2 in hail2.5 in hail2.5 in hail2.75 in hail3 in hail3 in hail3.5 in hail Mankato
  • 311 to 1.74 in
  • 141.75 to 2.74 in, golf ball to tennis ball
  • 42.75 in and up, baseball

Largest plotted stone: 3.5 in. Bigger dots are bigger stones.

49 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
April 13, 2026 3.5 in, about the size of a teacup 8 Lake Crystal
June 2, 2020 2.5 in, about the size of a tennis ball 4 Lake Crystal
August 22, 2021 2 in, about the size of a hen egg 6 Mankato
“Many thunderstorms produced large to very large hail measuring as large as 3.5 in diameter as well as four tornadoes across southern Minnesota.”
National Weather Service report, April 13, 2026
Source: NOAA Storm Events Database · data as of 2014–2026

Last big hail on record

April 13, 2026

Hail of 1.75 inches (golf ball) or larger fell on 9 days in 2014–2026. Our records end where NOAA's do, so a newer storm may not be listed yet.

Strongest tornado

EF1 · April 13, 2026

It stayed on the ground for 5.68 miles and was up to 200 yards wide. The tornado moved into Blue Earth County from Watonwan County. But some storm chaser video showed it to be entirely from the same parent circulation, hence one tornado. The tornado hit several farms. The maximum wind speed was estimated at 90 mph.

Strongest thunderstorm gust

100 mph · June 16, 2014

A storm survey concluded that severe straight-line winds caused damage to half of a metal building system north of Minnesota Lake. The building's metal wall and roof panels were peeled off with most of the northern half of the building collapsed.

What it means for flat roof

Flat and low-slope roofs hold hail on the surface instead of letting it bounce. With 3.5-inch hail on record in Blue Earth 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 Mankato

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

That typical price is about 4.3% of the median Mankato home value ($250,600).

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

Full Mankato cost guide by material →

What Mankato's climate means for flat roof

  • Flat and low-slope roofs in Mankato 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 Mankato, where dark membranes absorb punishing heat and age years faster.
  • Mankato'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 Mankato, MN

25 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 Mankato: questions

How do I find a flat roof company in Mankato?
PickARoofer lists roofing companies serving Mankato, MN. 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 Mankato?
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 Mankato?
April is the worst month: 29% of the 68 hail reports NOAA holds for the county came then. Reports run from April to September. Book the inspection before April, while crews still have open dates.
How big does hail get near Mankato?
The largest hail NOAA logged near Mankato measured 3.5 inches, about the size of a teacup. Hail of an inch or more fell on 16 days in the same record. The biggest day was April 13, 2026, with 8 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 Mankato, and does it matter for the roof?
The median home in Mankato was built in 1981, and 49.6% 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 90 freeze-thaw days a year, which loosens flashing and sealant.
What does roofing cost in Mankato?
For an average 2,000 sq ft home we model asphalt-shingle re-roof at $6,720 to $14,880 in Mankato, around $10,800 in the middle. That is about 4.3% of the median home value of $250,600. Your quote moves with roof size, pitch and how many layers come off.
How many roofing companies work around Mankato?
The Census Bureau counts 7 roofing companies with payroll in Blue Earth County. 42.9% of them have fewer than five employees, so most quotes come from owner-run crews. A roofer's median pay is $50,250 a year (BLS).
How do I maintain a flat roof through Mankato's winters?
Flat roof maintenance in Mankato 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 Mankato 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 Mankato contractors, though it runs warmer than TPO and may require more frequent coating. Cost, pitch, and building type typically dictate the right choice — a Mankato flat-roof specialist can walk you through the tradeoffs for your specific structure.
Do I need a permit for flat roof in Minnesota?
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.