Westminster, CO · Flat Roof

Flat Roof Contractors in Westminster, Colorado

Commercial or residential flat roof — compare local roofing companies. 21 local roofers listed.

Short answer: Flat and low-slope roofs in Westminster 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 Westminster: 0.4 heavy-rain days a year (1 inch+). Ask any roofer for a license number and a certificate of insurance.

Get a free quote See Westminster in numbers
  • 0.4heavy-rain days a year (1 inch+)
  • 17.9 inrain a year
  • 42days a year at 90°F or hotter
  • 34%of homes are not single-family houses

How much life is left in my Westminster roof?

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

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Flat roofs in Westminster take the hardest hit from freeze-thaw cycling: water that infiltrates a membrane seam freezes, expands, and opens the joint further each winter — heat-welded TPO seams hold up better than taped or adhered laps in this climate. Common flat roof systems in Westminster 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.

Westminster in numbers

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

  • #6of 209Westminster ranks #6 of the 209 cities we cover for freeze-thaw days.
  • #8of 209Westminster ranks #8 of the 209 cities we cover for median home value.
  • #196of 209Westminster ranks #196 of the 209 cities we cover for yearly rainfall (low end).
  • #36of 209Westminster ranks #36 of the 209 cities we cover for hail days of 1 inch or more.

Hail reports per year in the county

Hail events per year in the county, 2017 to 2026* 6 2017 18 2018 12 2019 6 2020 16 2021 34 2023 29 2024 12 2025 13 2026*
Hail events per year in the county, 2017 to 2026*
20176
201818
201912
20206
202116
202334
202429
202512
2026*13

146 recorded events across 8 full years plus 2026 to June represented in the data. 2023 had the most events among represented full years: 34.

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*

When storms hit Westminster

Hail reports by month in the county, all years combined 0 Jan 0 Feb 0 Mar 1 Apr 67 May 62 Jun 19 Jul 21 Aug 0 Sep 0 Oct 0 Nov 0 Dec
Hail reports by month in the county, all years combined
Jan0
Feb0
Mar0
Apr1
May67
Jun62
Jul19
Aug21
Sep0
Oct0
Nov0
Dec0

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

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

Roofing trade around Westminster

  • 92 roofing companies with payroll in the county, employing about 1,163 people; 73% have fewer than 5 employees.
  • A roofer's median pay here is $55,830 a year (Denver-Aurora-Centennial, CO Metro Area).
Source: Census CBP · data as of 2023 Source: BLS OEWS, roofers · data as of May 2025

Westminster storm record: Adams County

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

  • 1859Founded
  • 5,384 ft (1,641 m)Elevation
  • Westminster CastleNamed after

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

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  • 1011 to 1.74 in
  • 371.75 to 2.74 in, golf ball to tennis ball
  • 22.75 in and up, baseball

Largest plotted stone: 2.75 in. Bigger dots are bigger stones.

145 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
June 18, 2018 2.75 in, about the size of a baseball 9 Brighton
May 10, 2023 2.75 in, about the size of a baseball 8 Strasburg
July 29, 2018 2.5 in, about the size of a tennis ball 5 Strasburg
“The storms that moved across northern Washington County caused severe agricultural damage. Wheat fields were significantly damaged and the young corn was stripped of all its leaves.”
National Weather Service report, June 18, 2018
Source: NOAA Storm Events Database · data as of 2014–2026

Last big hail on record

June 8, 2026

Hail of 1.75 inches (golf ball) or larger fell on 17 days in 2014–2026. Our records end where NOAA's do, so a newer storm may not be listed yet.

Strongest tornado

EF2 · May 18, 2025

It stayed on the ground for 4.44 miles and was up to 400 yards wide. The largest of the 4 tornadoes on May 18th touched down near 48th and Highway 79 and moved north-northeast over the next 10-minutes. The largest swath of damage occurred just east of Provost Rd where a large barn/workshop was completely destroyed.

Strongest thunderstorm gust

81 mph · September 29, 2014

What it means for flat roof

Flat and low-slope roofs hold hail on the surface instead of letting it bounce. With 2.75-inch hail on record in Adams 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 Westminster

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

That typical price is about 2.4% of the median Westminster home value ($497,400).

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

Full Westminster cost guide by material →

What Westminster's climate means for flat roof

  • Westminster'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 Westminster, CO

21 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 Westminster: questions

How do I find a flat roof company in Westminster?
PickARoofer lists roofing companies serving Westminster, CO. 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 Westminster?
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 Westminster?
May is the worst month: 39% of the 170 hail reports NOAA holds for the county came then. Reports run from May to August. Book the inspection before May, while crews still have open dates.
How big does hail get near Westminster?
The largest hail NOAA logged near Westminster measured 2.75 inches, about the size of a baseball. Hail of an inch or more fell on 41 days in the same record. The biggest day was June 18, 2018, with 9 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 Westminster, and does it matter for the roof?
The median home in Westminster was built in 1987, and 34.6% 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 130 freeze-thaw days a year, which loosens flashing and sealant.
What does roofing cost in Westminster?
For an average 2,000 sq ft home we model asphalt-shingle re-roof at $7,560 to $16,740 in Westminster, around $12,150 in the middle. That is about 2.4% of the median home value of $497,400. Your quote moves with roof size, pitch and how many layers come off.
How many roofing companies work around Westminster?
The Census Bureau counts 92 roofing companies with payroll in Adams County, employing about 1,163 people. 72.8% of them have fewer than five employees, so most quotes come from owner-run crews. A roofer's median pay is $55,830 a year (BLS).
What flat roof problems are most common in Westminster's climate?
Freeze-thaw cycling attacks flat roof seams and flashing laps: water that infiltrates a membrane joint freezes, expands, and pries the joint further open each cycle. Heat-welded TPO seams are much more resistant to this than taped EPDM laps or torch-applied modified bitumen that relied on adhesion alone. After an ice season in Westminster, inspect all penetrations — HVAC curbs, plumbing vents, drains — where differential movement concentrates stress and where most freeze-thaw leaks start.
What is the difference between TPO, EPDM, and modified bitumen for Westminster 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 Westminster contractors, though it runs warmer than TPO and may require more frequent coating. Cost, pitch, and building type typically dictate the right choice — a Westminster flat-roof specialist can walk you through the tradeoffs for your specific structure.
Do I need a permit for flat roof in Colorado?
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.