Boise, ID · Flat Roof

Flat Roof Contractors in Boise, Idaho

Commercial or residential flat roof — compare local roofing companies. 30 local roofers listed.

Short answer: Flat and low-slope roofs in Boise 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 Boise: 0.2 heavy-rain days a year (1 inch+). Ask any roofer for a license number and a certificate of insurance.

Get a free quote See Boise in numbers
  • 0.2heavy-rain days a year (1 inch+)
  • 18 inrain a year
  • 51days a year at 90°F or hotter
  • 28%of homes are not single-family houses

How much life is left in my Boise roof?

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

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In Boise's high-UV desert climate, the single best investment for a flat roof is reflective coating applied on a defined maintenance cycle: it cuts surface temperature, extends membrane life, and delays full replacement by years. Common flat roof systems in Boise 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.

Boise in numbers

Public records for Boise, not estimates. Each figure shows its source.

  • #201of 209Boise ranks #201 of the 209 cities we cover for hail days of 1 inch or more (low end).
  • #9of 209Boise ranks #9 of the 209 cities we cover for median home value.
  • #196of 209Boise ranks #196 of the 209 cities we cover for largest hailstone on record (low end).
  • #194of 209Boise ranks #194 of the 209 cities we cover for yearly rainfall (low end).

Costliest storm day on record

May 21, 2023

7 reports that day (7 wind); reported property damage $0; county FIPS 16001, 2014–June 2026

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

When storms hit Boise

Hail reports by month in the county, all years combined 0 Jan 0 Feb 1 Mar 3 Apr 1 May 2 Jun 0 Jul 0 Aug 0 Sep 0 Oct 0 Nov 0 Dec
Hail reports by month in the county, all years combined
Jan0
Feb0
Mar1
Apr3
May1
Jun2
Jul0
Aug0
Sep0
Oct0
Nov0
Dec0

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

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

Roofing trade around Boise

  • 87 roofing companies with payroll in the county, employing about 630 people; 66% have fewer than 5 employees.
  • A roofer's median pay here is $60,100 a year (Boise City, ID Metro Area).
Source: Census CBP · data as of 2023 Source: BLS OEWS, roofers · data as of May 2025

Boise storm record: Ada County

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

  • 1863Founded
  • 2,703 ft (824 m)Elevation
  • City of TreesNickname

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

1 in hail1 in hail1 in hail1 in hail1.25 in hail1.5 in hail Boise
  • 61 to 1.74 in
  • 01.75 to 2.74 in, golf ball to tennis ball
  • 02.75 in and up, baseball

Largest plotted stone: 1.5 in. Bigger dots are bigger stones.

6 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 26, 2015 1.5 in, about the size of a ping-pong ball 1 Star
June 5, 2022 1.25 in, about the size of a half dollar 2 Kuna
April 3, 2024 1 in, about the size of a quarter 3 Boise Strawberry Gle
“Largest hail 1.5 inches and smallest about a penny at the intersection of Floating Feather Road and Pollard Lane.”
National Weather Service report, May 26, 2015
Source: NOAA Storm Events Database · data as of 2014–2026

Strongest tornado

EF0 · May 26, 2023

It stayed on the ground for 0.95 miles and was up to 3 yards wide.

Strongest thunderstorm gust

81 mph · September 5, 2019

Extensive damage to the high school campus was surveyed by NWS employees including trees knocked down onto houses in the vicinity. The peak thunderstorm wind was estimated at 80 MPH.

What it means for flat roof

Flat and low-slope roofs hold hail on the surface instead of letting it bounce. With 1.5-inch hail on record in Ada 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 Boise

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

That typical price is about 2.5% of the median Boise home value ($456,000).

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

Full Boise cost guide by material →

What Boise's climate means for flat roof

  • Under Boise's desert UV, membrane choice and reflective coatings drive lifespan more than anything else — plan on coating renewal to reach full service life.

Roofers in Boise, ID

30 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 Boise: questions

How do I find a flat roof company in Boise?
PickARoofer lists roofing companies serving Boise, ID. 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 Boise?
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 Boise?
April is the worst month: 43% of the 7 hail reports NOAA holds for the county came then. Reports run from March to June. Book the inspection before March, while crews still have open dates.
How big does hail get near Boise?
The largest hail NOAA logged near Boise measured 1.5 inches, about the size of a ping-pong ball. Hail of an inch or more fell on 4 days in the same record. The biggest day was May 26, 2015, with 1 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 Boise, and does it matter for the roof?
The median home in Boise was built in 1985, and 42.6% 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 106 freeze-thaw days a year, which loosens flashing and sealant.
What does roofing cost in Boise?
For an average 2,000 sq ft home we model asphalt-shingle re-roof at $7,140 to $15,810 in Boise, around $11,500 in the middle. That is about 2.5% of the median home value of $456,000. Your quote moves with roof size, pitch and how many layers come off.
How many roofing companies work around Boise?
The Census Bureau counts 87 roofing companies with payroll in Ada County, employing about 630 people. 65.5% of them have fewer than five employees, so most quotes come from owner-run crews. A roofer's median pay is $60,100 a year (BLS).
How long does a flat roof last in Boise?
A properly installed flat roof in Boise 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 Boise 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 Boise contractors, though it runs warmer than TPO and may require more frequent coating. Cost, pitch, and building type typically dictate the right choice — a Boise flat-roof specialist can walk you through the tradeoffs for your specific structure.
Do I need a permit for flat roof in Idaho?
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.

More in Boise

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.