Rochester, MN · Flat Roof

Flat Roof Contractors in Rochester, Minnesota

Commercial or residential flat roof — compare local roofing companies. 27 local roofers listed, 20 verified.

Short answer: Flat and low-slope roofs in Rochester 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 Rochester: 5.1 heavy-rain days a year (1 inch+). 20 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 Rochester in numbers
  • 5.1heavy-rain days a year (1 inch+)
  • 35.8 inrain a year
  • 4days a year at 90°F or hotter
  • 32%of homes are not single-family houses

How much life is left in my Rochester roof?

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

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Flat and low-slope roofs in Rochester perform reliably when drainage is maintained and membrane seams and penetrations are inspected annually — most flat roof leaks trace to neglected drains or failed seals around HVAC units and vents. Common flat roof systems in Rochester 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.

Rochester in numbers

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

  • #44of 209Rochester ranks #44 of the 209 cities we cover for median home value.
  • #157of 209Rochester ranks #157 of the 209 cities we cover for damaging thunderstorm-wind days (low end).

Hail reports per year in the county

Hail events per year in the county, 2017 to 2026* 27 2017 11 2018 4 2019 2 2020 4 2021 22 2022 9 2023 3 2024 7 2025 5 2026*
Hail events per year in the county, 2017 to 2026*
201727
201811
20194
20202
20214
202222
20239
20243
20257
2026*5

94 recorded events across 9 full years plus 2026 to June represented in the data, about 9.9 per represented full year. 2017 had the most events among represented full years: 27.

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.

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

Costliest storm day on record

Apr 17, 2026

7 reports that day (4 tornado, 3 hail); reported property damage $8,978,000; county FIPS 27109, 2014–June 2026

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

When storms hit Rochester

Hail reports by month in the county, all years combined 0 Jan 0 Feb 2 Mar 18 Apr 47 May 18 Jun 13 Jul 5 Aug 5 Sep 1 Oct 0 Nov 0 Dec
Hail reports by month in the county, all years combined
Jan0
Feb0
Mar2
Apr18
May47
Jun18
Jul13
Aug5
Sep5
Oct1
Nov0
Dec0

Most hail reports come in May; 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 Rochester

  • 15 roofing companies with payroll in the county, employing about 125 people; 60% have fewer than 5 employees.
  • A roofer's median pay here is $61,940 a year (Rochester, MN Metro Area).
Source: Census CBP · data as of 2023 Source: BLS OEWS, roofers · data as of May 2025

Rochester storm record: Olmsted County

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

  • 1854Founded
  • 3,379 ft (1,030 m)Elevation

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

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  • 531 to 1.74 in
  • 81.75 to 2.74 in, golf ball to tennis ball
  • 02.75 in and up, baseball

Largest plotted stone: 2 in. Bigger dots are bigger stones.

61 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
May 29, 2018 2 in, about the size of a hen egg 8 Rock Dell
June 16, 2017 1.75 in, about the size of a golf ball 6 Chester
May 11, 2022 1.75 in, about the size of a golf ball 3 Oronoco
Source: NOAA Storm Events Database · data as of 2014–2026

Last big hail on record

April 17, 2026

Hail of 1.75 inches (golf ball) or larger fell on 4 days in 2014–2026. Our records end where NOAA's do, so a newer storm may not be listed yet.

Strongest tornado

EF2 · April 17, 2026

It stayed on the ground for 9.71 miles and was up to 250 yards wide. This strong EF-2 tornado began on the northeast side of Stewartville resulting in damage to several homes. The tornado then moved northeast through rural areas of Olmsted County while being highly visible on MNDOT cameras and from Rochester.

Strongest thunderstorm gust

81 mph · July 13, 2024

The ASOS at Rochester International Airport recorded an 81 mph wind gust.

What it means for flat roof

Flat and low-slope roofs hold hail on the surface instead of letting it bounce. With 2-inch hail on record in Olmsted 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 Rochester

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

That typical price is about 3.8% of the median Rochester home value ($287,500).

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

Full Rochester cost guide by material →

Roofers in Rochester, MN

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 Rochester: questions

How do I find a flat roof company in Rochester?
PickARoofer lists roofing companies serving Rochester, 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 Rochester?
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 Rochester?
May is the worst month: 43% of the 109 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 Rochester?
The largest hail NOAA logged near Rochester measured 2 inches, about the size of a hen egg. Hail of an inch or more fell on 23 days in the same record. The biggest day was May 29, 2018, 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 Rochester, and does it matter for the roof?
The median home in Rochester was built in 1987, and 42.2% 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 89 freeze-thaw days a year, which loosens flashing and sealant.
What does roofing cost in Rochester?
For an average 2,000 sq ft home we model asphalt-shingle re-roof at $6,720 to $14,880 in Rochester, around $10,800 in the middle. That is about 3.8% of the median home value of $287,500. Your quote moves with roof size, pitch and how many layers come off.
How many roofing companies work around Rochester?
The Census Bureau counts 15 roofing companies with payroll in Olmsted County, employing about 125 people. 60% of them have fewer than five employees, so most quotes come from owner-run crews. A roofer's median pay is $61,940 a year (BLS).
How long does a flat roof last in Rochester?
A properly installed flat roof in Rochester lasts 15 to 25 years depending on material and maintenance. TPO and EPDM systems at the higher end; modified bitumen at the lower end without coating renewal. The biggest variable is drainage maintenance: a flat roof that drains properly and gets annual inspections reaches its rated lifespan; one with chronically clogged drains fails years early. Commercial buildings and multi-family properties benefit from a maintenance agreement that includes two drain clearings per year.
What is the difference between TPO, EPDM, and modified bitumen for Rochester 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 Rochester contractors, though it runs warmer than TPO and may require more frequent coating. Cost, pitch, and building type typically dictate the right choice — a Rochester 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.