Norman, OK · Flat Roof

Flat Roof Contractors in Norman, Oklahoma

Commercial or residential flat roof — compare local roofing companies. 29 local roofers listed, 14 verified.

Short answer: Flat and low-slope roofs in Norman 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 Norman: 8.3 heavy-rain days a year (1 inch+). 14 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 Norman in numbers
  • 8.3heavy-rain days a year (1 inch+)
  • 37.8 inrain a year
  • 74days a year at 90°F or hotter
  • 34%of homes are not single-family houses

How much life is left in my Norman roof?

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

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Flat and low-slope roofs in Norman 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 Norman 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.

Norman in numbers

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

  • #10of 209Norman ranks #10 of the 209 cities we cover for hail days of 1 inch or more.
  • #38of 209Norman ranks #38 of the 209 cities we cover for largest hailstone on record.
  • #52of 209Norman ranks #52 of the 209 cities we cover for damaging thunderstorm-wind days.

Hail reports per year in the county

Hail events per year in the county, 2017 to 2026* 17 2017 6 2018 19 2019 43 2020 17 2021 11 2022 92 2023 33 2024 71 2025 20 2026*
Hail events per year in the county, 2017 to 2026*
201717
20186
201919
202043
202117
202211
202392
202433
202571
2026*20

329 recorded events across 9 full years plus 2026 to June represented in the data, about 34.3 per represented full year. 2023 had the most events among represented full years: 92.

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

Feb 26, 2023

5 reports that day (2 hail, 2 tornado, 1 wind); reported property damage $50,033,000; county FIPS 40027, 2014–June 2026

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

When storms hit Norman

Hail reports by month in the county, all years combined 1 Jan 3 Feb 17 Mar 110 Apr 114 May 45 Jun 6 Jul 27 Aug 25 Sep 15 Oct 2 Nov 0 Dec
Hail reports by month in the county, all years combined
Jan1
Feb3
Mar17
Apr110
May114
Jun45
Jul6
Aug27
Sep25
Oct15
Nov2
Dec0

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

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

Roofing trade around Norman

  • 53 roofing companies with payroll in the county, employing about 243 people; 81% have fewer than 5 employees.
  • A roofer's median pay here is $43,680 a year (Oklahoma City, OK Metro Area).
Source: Census CBP · data as of 2023 Source: BLS OEWS, roofers · data as of May 2025

Norman storm record: Cleveland County

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

  • 1889Founded
  • 1,171 ft (357 m)Elevation

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

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  • 691 to 1.74 in
  • 521.75 to 2.74 in, golf ball to tennis ball
  • 192.75 in and up, baseball

Largest plotted stone: 3.41 in. Bigger dots are bigger stones.

295 reports of 1 inch or larger have coordinates; the map shows the 140 largest. 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 4, 2020 3.41 in, about the size of a teacup 19 Lake Thunderbird Dam
April 28, 2021 3 in, about the size of a teacup 11 Norman
October 10, 2021 3 in, about the size of a teacup 5 Norman
“A couple of supercells produced very large hail in central Oklahoma during the afternoon and evening of the 4th. Other storms later produced large hail and damaging wind gusts across portion of southern Oklahoma. One tornado was observed in southeast Cleveland County east of Lexington.”
National Weather Service report, May 4, 2020
Source: NOAA Storm Events Database · data as of 2014–2026

Last big hail on record

May 8, 2026

Hail of 1.75 inches (golf ball) or larger fell on 20 days in 2014–2026. Our records end where NOAA's do, so a newer storm may not be listed yet.

Strongest tornado

EF3 · November 3, 2024

It stayed on the ground for 1.0 miles and was up to 400 yards wide. This tornado developed just northeast of SE 104th Street and Sunnylane Road in southeast Oklahoma City, and moved north-northeast. A number of homes were damaged, including at least one with most of the exterior walls collapsed and significant roof damage.

Strongest thunderstorm gust

105 mph · May 6, 2024

A corridor of significant straight-line wind damage was identified across portions of far northwestern Cleveland County, immediately preceding a tornado across far southern Oklahoma County (see separate entry for details on this event).

What it means for flat roof

Flat and low-slope roofs hold hail on the surface instead of letting it bounce. With 3.41-inch hail on record in Cleveland 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 Norman

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

That typical price is about 4.0% of the median Norman home value ($239,300).

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

Full Norman cost guide by material →

Roofers in Norman, OK

29 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 Norman: questions

How do I find a flat roof company in Norman?
PickARoofer lists roofing companies serving Norman, OK. 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.
Will insurance pay for storm-related flat roof in Norman?
Coverage, deductibles and reporting deadlines depend on your policy and circumstances. Document damage safely, contact your insurer promptly and ask for a written repair scope. This directory cannot determine coverage.
When is hail season in Norman?
May is the worst month: 31% of the 365 hail reports NOAA holds for the county came then. Reports run from March to October. Book the inspection before March, while crews still have open dates.
How big does hail get near Norman?
The largest hail NOAA logged near Norman measured 3.41 inches, about the size of a teacup. Hail of an inch or more fell on 59 days in the same record. The biggest day was May 4, 2020, with 19 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 Norman, and does it matter for the roof?
The median home in Norman was built in 1988, and 38.7% 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 59 freeze-thaw days a year, which loosens flashing and sealant.
What does roofing cost in Norman?
For an average 2,000 sq ft home we model asphalt-shingle re-roof at $5,950 to $13,175 in Norman, around $9,550 in the middle. That is about 4% of the median home value of $239,300. Your quote moves with roof size, pitch and how many layers come off.
How many roofing companies work around Norman?
The Census Bureau counts 53 roofing companies with payroll in Cleveland County, employing about 243 people. 81.1% of them have fewer than five employees, so most quotes come from owner-run crews. A roofer's median pay is $43,680 a year (BLS).
How long does a flat roof last in Norman?
A properly installed flat roof in Norman 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 Norman 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 Norman contractors, though it runs warmer than TPO and may require more frequent coating. Cost, pitch, and building type typically dictate the right choice — a Norman flat-roof specialist can walk you through the tradeoffs for your specific structure.
Do I need a permit for flat roof in Oklahoma?
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.