Ann Arbor, MI · Flat Roof

Flat Roof Contractors in Ann Arbor, Michigan

Commercial or residential flat roof — compare local roofing companies. 28 local roofers listed, 1 verified.

Short answer: Flat and low-slope roofs in Ann Arbor 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 Ann Arbor: 3.4 heavy-rain days a year (1 inch+). 1 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 Ann Arbor in numbers
  • 3.4heavy-rain days a year (1 inch+)
  • 35.6 inrain a year
  • 3days a year at 90°F or hotter
  • 47%of homes are not single-family houses

How much life is left in my Ann Arbor roof?

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

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Flat and low-slope roofs in Ann Arbor 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 Ann Arbor 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.

Ann Arbor in numbers

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

  • #14of 209Ann Arbor ranks #14 of the 209 cities we cover for median home value.
  • #38of 209Ann Arbor ranks #38 of the 209 cities we cover for freeze-thaw days.

Hail reports per year in the county

Hail events per year in the county, 2017 to 2026* 8 2017 4 2018 4 2019 4 2020 3 2021 16 2023 2 2024 1 2025 1 2026*
Hail events per year in the county, 2017 to 2026*
20178
20184
20194
20204
20213
202316
20242
20251
2026*1

43 recorded events across 8 full years plus 2026 to June represented in the data. 2023 had the most events among represented full years: 16.

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: 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 15, 2023

11 reports that day (10 hail, 1 wind); reported property damage $1,001,000; county FIPS 26161, 2014–June 2026

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

When storms hit Ann Arbor

Hail reports by month in the county, all years combined 0 Jan 3 Feb 5 Mar 5 Apr 16 May 16 Jun 18 Jul 2 Aug 4 Sep 0 Oct 0 Nov 0 Dec
Hail reports by month in the county, all years combined
Jan0
Feb3
Mar5
Apr5
May16
Jun16
Jul18
Aug2
Sep4
Oct0
Nov0
Dec0

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

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

Roofing trade around Ann Arbor

  • 16 roofing companies with payroll in the county; 44% have fewer than 5 employees.
  • A roofer's median pay here is $61,730 a year (Ann Arbor, MI Metro Area).
Source: Census CBP · data as of 2023 Source: BLS OEWS, roofers · data as of May 2025

Ann Arbor storm record: Washtenaw County

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

  • 1824Founded
  • 840 ft (256 m)Elevation
  • Ann Isabella AllenNamed after

Where hail of 1 inch or more was reported in Washtenaw 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 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 hail2 in hail2 in hail Ann Arbor
  • 411 to 1.74 in
  • 41.75 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.

45 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 27, 2015 2 in, about the size of a hen egg 14 Hudson Mills
July 20, 2023 2 in, about the size of a hen egg 3 Ypsilanti
June 15, 2023 1.75 in, about the size of a golf ball 10 Delhi Mills · $1 million damage
“Large hail was reported, mainly impacting Livingston and Washtenaw Counties.”
National Weather Service report, May 27, 2015
Source: NOAA Storm Events Database · data as of 2014–2026

Last big hail on record

July 20, 2023

Hail of 1.75 inches (golf ball) or larger fell on 3 days in 2014–2026. Our records end where NOAA's do, so a newer storm may not be listed yet.

Strongest tornado

EF1 · June 23, 2015

It stayed on the ground for 4.33 miles and was up to 100 yards wide. A tornado downed down just east of M-52 and North of Bethel Church Road. The tornado tracked toward the east parallel to Bethel Church Road and lifted just east of Lima Center Road. A consistent path of tree damage was identified between homesteads.

Strongest thunderstorm gust

75 mph · May 13, 2014

Widespread trees down, some of which fell onto homes which caused structural damage.

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 Washtenaw 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 Ann Arbor

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

That typical price is about 2.4% of the median Ann Arbor home value ($435,100).

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

Full Ann Arbor cost guide by material →

What Ann Arbor's climate means for flat roof

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

28 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 Ann Arbor: questions

How do I find a flat roof company in Ann Arbor?
PickARoofer lists roofing companies serving Ann Arbor, MI. 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 Ann Arbor?
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 Ann Arbor?
July is the worst month: 26% of the 69 hail reports NOAA holds for the county came then. Reports run from February to September. Book the inspection before February, while crews still have open dates.
How big does hail get near Ann Arbor?
The largest hail NOAA logged near Ann Arbor measured 2 inches, about the size of a hen egg. Hail of an inch or more fell on 16 days in the same record. The biggest day was May 27, 2015, with 14 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 Ann Arbor, and does it matter for the roof?
The median home in Ann Arbor was built in 1971, and 64.3% 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 97 freeze-thaw days a year, which loosens flashing and sealant.
What does roofing cost in Ann Arbor?
For an average 2,000 sq ft home we model asphalt-shingle re-roof at $6,510 to $14,415 in Ann Arbor, around $10,450 in the middle. That is about 2.4% of the median home value of $435,100. Your quote moves with roof size, pitch and how many layers come off.
How many roofing companies work around Ann Arbor?
The Census Bureau counts 16 roofing companies with payroll in Washtenaw County. 43.8% of them have fewer than five employees, so most quotes come from owner-run crews. A roofer's median pay is $61,730 a year (BLS).
How do I maintain a flat roof through Ann Arbor's winters?
Flat roof maintenance in Ann Arbor 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 Ann Arbor 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 Ann Arbor contractors, though it runs warmer than TPO and may require more frequent coating. Cost, pitch, and building type typically dictate the right choice — a Ann Arbor flat-roof specialist can walk you through the tradeoffs for your specific structure.
Do I need a permit for flat roof in Michigan?
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.