Short answer: As of October 2026, the one highest-scoring roofing contractors in the Twin Falls, ID metro on The Roofing Brief Contractor Score are Willow Exterior Renovation & Construction (85.0). All of them carry a verifiable manufacturer certification, every rating here was cross-checked against an independent record, and no money changed hands for any placement.
The Roofing Brief scored 1 certified roofing contractors serving the Twin Falls metro on a published, reproducible formula, then researched each of the top one individually to confirm its record. On the Snake River Plain the roof threat is wind: damaging wind reports outnumber hail almost three to one, and on 17 December 2025 a rare winter squall line gusted to 68 mph at the airport, ripped a roof off in Bliss and critically injured two children at a school bus stop. Yet Twin Falls requires no permit for a reroof, no ice and water shield, and Idaho bars any code tougher than the national model. Only one certified firm appears in the directory for the area, and it is ranked.
Quick picks for Twin Falls:
- Willow Exterior Renovation & Construction: best overall (TRB Score 85.0). Verified services: commercial roofing, siding.
Wind, terrain and the Twin Falls housing stock
Idaho registers rather than licenses contractors: anyone doing construction work must register with the Division of Occupational and Professional Licenses, with $300,000 of liability insurance and workers’ compensation or a statement why none is needed, but no exam. The only small-job exemption is a single casual job under $2,000. Working unregistered is a misdemeanour, an unregistered contractor cannot sue to collect or claim a lien, and cities may not run their own contractor licences, so the state registration is the only credential.
In the City of Twin Falls a residential reroof needs no building permit; the city lists it alongside interior paint and carpet. That means the state rule putting the contractor’s registration number on a posted permit never reaches a reroof, and no inspector sees the nailing or underlayment. Door-to-door sellers of services need a city transient merchant licence, and the application asks for criminal convictions and every town worked in the past six months.
Twin Falls designs houses for a 115 mph wind speed and a 15 psf ground snow load with a 25 psf minimum roof load by local ordinance, and does not require ice and water shield, leaving underlayment to the shingle maker’s instructions. Idaho law bars the state from adopting a residential code more restrictive than the national model. We found no Idaho statute on roofers waiving deductibles.
Across 2016 to 2025 Twin Falls and Jerome counties logged 28 thunderstorm wind reports, ten hail reports none larger than 1.5 inches, and two weak tornadoes, with no recorded damage. Forecast zones add 19 high wind reports, including a 70 mph gust at the airport in March 2021, and ten heavy snow days. In August 2021 a 70 to 80 mph downburst peeled a garage roof in Buhl. Nearly half the metro’s homes predate 1980, and 35.9 percent of Twin Falls’s homes are rented.
The one certified roofer ranked in Twin Falls, ID
Scored 2026-10-12. The metro mean rating used as the Bayesian prior for Twin Falls is 4.9, across a pool of 1 certified contractors.
| Rank | Company | TRB Score | Certification | Rating (reviews) | Adjusted | In business since | Based in |
|---|---|---|---|---|---|---|---|
| 1 | Willow Exterior Renovation & Construction | 85.0 | Master Elite | 4.9 (106) | 4.9 | 2018 | Twin Falls, ID |
1. Willow Exterior Renovation & Construction: best overall (TRB Score 85.0)
Willow Exterior Renovation & Construction is based in Twin Falls, ID, in business since 2018, led by Alexander Wondrick, owner, BBB accredited since 7 September 2018, A+ rating, no complaints, and holds Master Elite standing on the GAF certification registry.
| Score component | Points | Max |
|---|---|---|
| Certification tier | 24 | 35 |
| Adjusted rating | 36.0 | 40 |
| Review corpus depth | 15.0 | 15 |
| Metro proximity | 10.0 | 10 |
| Total | 85.0 | 100 |
Independently corroborated:
- Willow Exterior Renovation & Construction LLC holds registration RCE-47692, issued 3 May 2018, active to May 2028, with no discipline on record.. Idaho DOPL contractor register
- Formed 20 March 2018, active and in good standing; registered agent Alexander T. Wondrick.. Idaho Secretary of State
- Accredited since September 2018 with an A+ rating; business started May 2018; no complaints.. BBB business profile
- Residential and commercial roofing and vinyl siding; serves Twin Falls, Jerome, Buhl and Burley, with offices quoted for Pocatello and Meridian.. Company website
What they actually do. Residential and commercial roofing and vinyl siding.
Services we could verify: commercial roofing, siding.
Why it ranks here. A Master Elite firm with a showroom in Filer, just west of Twin Falls, and 106 GAF reviews averaging 4.9. The state, BBB and the company all agree on its May 2018 founding, its registration is active with no discipline, and BBB has accredited it since 2018 without a complaint.
Best fit for: Twin Falls and Jerome homeowners who want a top-tier GAF firm with a clean state and BBB record.
What we would want clarified. It is the only certified firm here and also markets across southern Idaho, so confirm a local crew; Idaho holds no contractor bond, so there is no bond to claim against. We publish this because a ranking that only prints the flattering findings is an advertisement, not an assessment.
Verify the certification yourself on the GAF registry listing. The number carried on that listing is (208) 735-8425, which is the registry’s contact line and is often a directory tracking number rather than the contractor’s own: take the number from the company’s own website and compare the two.
Other registered roofers serving Twin Falls
Only one certified firm is ranked here. These four hold active Idaho contractor registrations with no discipline and BBB A+ ratings. They are not scored and we are not recommending them.
| Company | Verified credential |
|---|---|
| Rainguard Roofing | Complete Construction Inc holds Idaho registration RCE-27297 since 2009 and a public works licence; Owens Corning Preferred on Eldridge Ave; BBB accredited since 2015 at A+. |
| Southern Idaho Roofing LLC | Idaho registration RCE-39004 since 2015, based in Hansen; Owens Corning Preferred; BBB A+, not accredited. Its registration was briefly inactive in mid-2025. |
| Heck Roofing LLC | Idaho public works licence 075117, which carries contractor registration; BBB accredited since 2019 at A+, trading since 2018, service area across the Magic Valley. |
| Roof Rescue | Idaho registration RCE-37148 and Owens Corning Platinum Preferred at a Twin Falls branch on Addison Ave; headquartered in Idaho Falls. |
Roof replacement and repair in Twin Falls, ID
Short answer: In Twin Falls, Willow Exterior Renovation & Construction is the one certified firm ranked: a Master Elite roofer with a Filer showroom, 4.9 across 106 reviews and a clean state and BBB record, doing residential and commercial roofing and vinyl siding. The rule that matters most: the city requires no permit for a residential reroof, so no inspector checks the work, and Idaho’s contractor registration is the only credential to verify.
On the Snake River Plain the roof threat is wind. Across 2016 to 2025 Twin Falls and Jerome counties logged 28 thunderstorm wind reports against ten hail reports, none larger than 1.5 inches, and two weak tornadoes. On 17 December 2025 a rare winter squall line gusted to 68 mph at the airport and ripped a roof off in Bliss. On 16 August 2021 a 70 to 80 mph downburst peeled part of a metal garage roof in Buhl, and in July 2017 a large section of a motel roof near Rogerson was peeled away. May, September and June have the most storm reports.
The rules ask little of a reroof. In the City of Twin Falls a residential reroof needs no building permit, so no inspector sees the nailing or underlayment. The city designs houses for a 115 mph wind speed and a 15 psf ground snow load with a 25 psf minimum roof load, and does not require ice and water shield, leaving underlayment to the shingle maker’s instructions. Idaho law bars the state from adopting a residential code more restrictive than the national model. Under the 2018 IRC a roof replacement is removed down to the deck, and a recover is barred over a water-soaked or deteriorated roof, slate or tile, or two existing layers.
Idaho registers rather than licenses contractors. Anyone doing construction work must register with the Division of Occupational and Professional Licenses, with $300,000 of liability insurance and workers’ compensation or a statement why none is needed, but no exam. Working unregistered is a misdemeanour, an unregistered contractor cannot sue to collect, and Idaho holds no contractor bond to claim against. Door-to-door sellers of services need a city transient merchant licence. We found no Idaho statute on roofers waiving deductibles, and no insurance matching rule was located. With no inspection, write the high-wind nailing pattern, sealed starter strips at eaves and rakes, and ice and water membrane at the eaves into the contract.
Willow Exterior Renovation & Construction, registration RCE-47692 with no discipline on record, does residential and commercial roofing and vinyl siding across Twin Falls, Jerome, Buhl and Burley. It also markets across southern Idaho, so confirm a local crew. Other registered firms, not scored here, include Rainguard Roofing, registered since 2009 and BBB accredited since 2015, Southern Idaho Roofing in Hansen, Heck Roofing, which serves the Magic Valley, and Roof Rescue, an Owens Corning Platinum Preferred firm with a Twin Falls branch. Check any roofer’s registration on the state eDOPL search before you pay anything.
| Rule | What applies | Source |
|---|---|---|
| Contractor registration | Required for construction work; $300,000 liability insurance and workers’ compensation or a statement why none is needed; no exam. The only small-job exemption is a single casual job under $2,000. | Idaho Code 54-5204, 54-5210 |
| Working unregistered | A misdemeanour; an unregistered contractor cannot sue to collect or claim a lien. | Idaho Contractors Board |
| Reroof permit | Not required for a residential reroof in the City of Twin Falls. | Twin Falls Building Safety Department |
| Design loads | 115 mph wind; 15 psf ground snow; 25 psf minimum roof load. | Twin Falls design criteria |
| Ice and water shield | Not required; underlayment follows the shingle maker’s instructions. | Twin Falls design criteria |
| Stricter local code | Barred: the state may not adopt a residential code more restrictive than the national model. | Idaho Code 39-4109(3) |
| 25 percent rule | Idaho has no 25 percent roof rule; the Idaho amendments do not change the 2018 IRC reroofing section. | IDAPA 24.39.30.600 |
Related guides: the 25% roofing rule in Idaho and every other state; how to decide between roof repair and replacement; how to read and compare a roof replacement quote; how to compare roof repair quotes; what homeowners insurance covers on a roof.
The 28 wind reports that shape a Twin Falls roof
Aggregate hail counts tell you very little about a specific roof. These are the individual events: every severe-weather report logged by the National Weather Service across the 2 counties of the Twin Falls, ID statistical area over ten years, with the dates, the stone sizes and the towns they landed on. Over that decade the metro logged 10 hail reports, 28 severe thunderstorm and high wind reports and 2 tornadoes. The database’s property-damage fields are left blank for most of these reports, so it carries no usable loss total for this metro and we do not quote one.
The biggest hail to fall on Twin Falls in a decade
| Date | Stone size | Reported near | County |
|---|---|---|---|
| 9 September 2019 | 1.5 in | Hansen | Twin Falls |
| 9 September 2019 | 1.25 in | Berger | Twin Falls |
| 26 May 2023 | 1.25 in | Hollister | Twin Falls |
| 30 May 2018 | 1.25 in | Murtaugh | Twin Falls |
| 9 September 2019 | 1.0 in | Berger | Twin Falls |
| 9 September 2019 | 1.0 in | Twin Falls | Twin Falls |
The largest stone on record for this metro fell on 9 September 2019 near Hansen, measured at 1.5 inches. That is ping-pong-ball sized, enough to bruise asphalt shingles and shorten a roof’s life without necessarily looking dramatic from the ground.
Wind. The strongest thunderstorm gust logged in the metro was 69 knots, about 79 mph, near Eden on 11 May 2025. Asphalt shingles begin lifting at roughly 67 mph when they are correctly nailed, and considerably below that when they are not.
Tornadoes. 2 tornadoes touched down in these counties over the decade, the strongest rated EF0 near Jerome Co Arpt on 30 June 2016.
What the National Weather Service wrote about it
The NWS logs a written account of each severe-weather episode. This is its description of the 16 August 2021 event near Cedar, reproduced verbatim:
Several residents described a sudden wind storm occurring with little, if any, rain and lasting about 5 to 10 minutes between approximately 7:20 pm and 7:30 pm. A resident described two bursts of wind about 3 minutes apart. Most of the damage was observed on the north side of town… north of Highway 30 between Buhl and the Snake River along E 1500 E road. The damage consisted of numerous large diameter trees (both hardwood and soft wood), which were uprooted and blown down toward the northeast. Some of the falling trees damaged trailers, cars, roofs and fences when they fell. One travel trailer was totally destroyed by a falling tree. Another travel trailer was blown over and rolled by the…
That is the kind of damage a roof in this metro has to be specified against, described by the agency that recorded it rather than by a contractor selling the repair.
When it happens. Severe weather reports cluster in May (12), September (7), June (6). The worst years on record were 2019 (13), 2025 (11), 2017 (5). If you are scheduling non-urgent work in Twin Falls, the months outside that window are when crews are least stretched and least likely to be triaging emergency callouts ahead of your job.
Source: NOAA National Centers for Environmental Information, Storm Events Database, county-level detail files 2016 to 2025, filtered to the counties of this statistical area by The Roofing Brief. Damage figures are as reported to the NWS and undercount insured losses.
What to do with this. Hail is not the governing risk in Twin Falls. Weight your decision toward wind rating, ventilation and flashing detail rather than paying extra for impact-rated shingles.
A wind-country roof market with a light-touch code
County records for Twin Falls and Jerome show 28 damaging wind reports against ten hail reports over the decade, with measured gusts of 77 mph on I-84 near Hazelton in 2020 and 79 mph at the Hansen Bridge in May 2025. In October 2019 about 30 power poles came down along Highway 93 between Twin Falls and Shoshone.
The worst came in December. On 17 December 2025 a squall line riding an atmospheric river front swept the Western Magic Valley, where every automated site topped 45 mph and the airport hit 68 mph. A gust toppled trees onto two children waiting for a school bus south-east of Twin Falls, critically injuring them; a roof was ripped off in Bliss, two pines fell on a house in Hazelton and brick walls toppled in Hollister. The Weather Service called the convective December setup very rare.
Summer downbursts do the rest. On 16 August 2021 a dry downburst of 70 to 80 mph hit the north side of Buhl, where falling trees damaged trailers, cars, roofs and fences and part of a metal garage roof peeled off; in July 2017 a large section of a motel roof near Rogerson was peeled away.
The rules ask little of a reroof here. Twin Falls requires no permit and no ice and water shield, designs for 15 psf of snow, and Idaho forbids a residential code stricter than the national model. That leaves wind resistance to the roofer and the shingle maker’s instructions, with no inspector checking.
So write it into the contract: the nailing pattern the shingle maker requires for high wind, sealed starter strips at eaves and rakes, and ice and water membrane at the eaves even though the city does not demand it. Check the roofer’s Idaho registration on the state search before you pay anything.
Twin Falls’ wind record and the rules on a reroof
| Item | Figure or rule | Source |
|---|---|---|
| Windstorm, 17 December 2025 | 68 mph at the airport; roof off in Bliss; two children critically injured | NWS Boise via NOAA NCEI |
| Buhl downburst, 16 August 2021 | 70 to 80 mph; garage roof peeled | NWS Boise via NOAA NCEI |
| Wind and hail reports, 2016 to 2025 | 28 wind against 10 hail | NOAA NCEI Storm Events |
| Largest hail, 2016 to 2025 | 1.5 inches, Hansen, 9 September 2019 | NOAA NCEI Storm Events |
| Reroof permit, City of Twin Falls | Not required | Twin Falls Building Safety Department |
| Ice and water shield | Not required | Twin Falls design criteria |
| Design loads | 115 mph wind; 15 psf ground snow; 25 psf minimum roof load | Twin Falls design criteria |
| Contractor registration | Required; $300,000 liability; no exam | Idaho Code 54-5204, 54-5210 |
| Stricter local code | Barred by state law | Idaho Code 39-4109(3) |
| Renter-occupied homes, Twin Falls | 35.9% | ACS 2020 to 2024, B25003 |
Source: NWS Boise episode narratives and NOAA NCEI Storm Events Database (Twin Falls and Jerome counties and zones IDZ016 and IDZ030); Idaho Code 54-5204 to 54-5217, 39-4109 and 41-293; Idaho Division of Occupational and Professional Licenses register; Idaho Secretary of State; City of Twin Falls Building Safety Department pages and design criteria; City of Twin Falls clerk licensing; Owens Corning contractor locator; BBB business profiles; US Census Bureau ACS 2020 to 2024.
The checks worth making in Twin Falls
Licensing is required in ID. Idaho requires contractor registration with the Idaho Contractors Board, part of the Division of Occupational and Professional Licenses, for any construction work of $2,000 or more in combined labour and materials. It is a registration rather than a licence.
Registration requires proof of $300,000 general liability insurance and a fee, but no trade examination. Idaho does not test roofing competence at state level, so a registration number confirms that a contractor is insured and on the register, not that anyone has assessed its work. Within 60 days of registering, the number must appear on contracts, advertising, permits, letterheads and purchase orders and at the place of business; because it is written on the building permit, which must be posted at the site, it also reaches the job.
Check here: Idaho eDOPL licence and registration search. Idaho Code 54-5213 stops cities and counties from starting new contractor licensing programmes after 1 January 2007, but some older city programmes still run: Idaho Falls, for one, requires roofers to hold a city Class D licence, earned by passing an ICC code exam, a relevant degree or reciprocity, as well as state registration. Elsewhere, check the state registration and the local building permit. An unregistered contractor commits a misdemeanour and cannot sue for payment.
Four checks to run before you sign anything, in any state.
- Verify certification at the source. Use the GAF verification tool rather than trusting a badge image on a company website.
- Get the certificate of insurance from the insurer, not the contractor, and confirm general liability and workers compensation are both active on the day work starts.
- Confirm who pulls the permit. If a contractor asks you to pull it as the homeowner, that moves liability onto you. Decline.
- Get warranty terms in writing before any deposit, and check the manufacturer warranty being promised actually requires the certification tier the contractor holds.
The Twin Falls market behind this ranking
1 certified roofing contractors serve the principal cities of the Twin Falls, ID statistical area, of which 0 hold the top President’s Club tier. The pool carries 106 customer reviews between them at a mean rating of 4.9. The statistical area had a 2024 population of 122,565, a change of 7.24% against the 2020 census base, per the U.S. Census Bureau Vintage 2024 estimates.
How these Twin Falls rankings were produced
Every contractor in the Twin Falls, ID pool was scored out of 100 on four published components: certification tier, a Bayesian adjusted rating, review depth and distance from the metro centre. In this metro that meant scoring 1 certified contractor, of whom 0 hold President’s Club standing and 1 Master Elite, against a metro mean rating of 4.9. The top one were then researched individually against Better Business Bureau records, state licence registers and manufacturer directories. Good and bad findings are published together, and no contractor paid for a place here.
The full method, the weightings, what the GAF certification tiers actually mean, who is eligible to be ranked and what we do not claim are all set out on our roofer ranking methodology page. Last updated: October 2026. Scoring run: 2026-10-12. Corrections go to the editor and are actioned on verification.
What Twin Falls homeowners want to know
Who is the best roofer in Twin Falls, ID?
What is the 25% rule for roofing in Idaho?
Idaho has no 25 percent roof rule. The Idaho Residential Code is the 2018 International Residential Code with Idaho amendments that do not change the reroofing section. Under R908.3 a roof replacement is removed down to the deck, and R908.3.1.1 bars a recover over a water-soaked or deteriorated roof, slate or tile, or two existing layers.
Do I need a permit to replace a roof in Twin Falls?
No. In the City of Twin Falls a residential reroof needs no building permit; the city lists it alongside interior paint and carpet. That means no inspector sees the nailing or underlayment, so specify them in the contract.
Is ice and water shield required in Twin Falls?
No. Twin Falls does not require ice and water shield and leaves underlayment to the shingle maker’s instructions, and Idaho bars any residential code tougher than the national model. You can still write ice and water membrane at the eaves into your contract.
How do I know if a roofer in Twin Falls is registered?
Search the Idaho eDOPL licence and registration database. Registration requires $300,000 of liability insurance but no exam, so it confirms a contractor is insured and on the register, not that its work has been assessed. Willow Exterior Renovation & Construction, for example, holds registration RCE-47692 with no discipline on record.
How many certified roofing contractors serve Twin Falls?
1 contractors on the GAF certification registry serve the principal cities of the Twin Falls, ID statistical area as of October 2026, of which 0 hold President’s Club status.
How much damaging hail does Twin Falls get?
The Twin Falls, ID statistical area recorded 10 hail reports of 1 inch or larger and 0 of 2 inches or larger between 2016 and 2025 in the NOAA Storm Events Database. The largest hailstone reported measured 1.5 inches.
Did any contractor pay to appear on this list?
No. The Roofing Brief takes no placement fees, no lead fees and no affiliate commission from any roofing contractor. Ranking comes entirely from the published formula applied to public registry data, followed by an individual research pass on the top one.
What was the worst hailstorm in Twin Falls in the last ten years?
The largest hailstone logged by the National Weather Service in the Twin Falls, ID statistical area between 2016 and 2025 measured 1.5 inches, reported near Hansen on 9 September 2019. That is ping-pong-ball sized, enough to bruise asphalt shingles and shorten a roof’s life without necessarily looking dramatic from the ground. Across the decade the metro recorded 10 hail reports. The database’s property-damage fields are left blank for most of these reports, so it carries no usable loss total for this metro and we do not quote one.
When is the worst time of year for roof damage in Twin Falls?
Severe-weather reports in the Twin Falls, ID statistical area cluster in May, September, June, on the NOAA record for 2016 to 2025. Scheduling discretionary work away from that window tends to get you a better crew and a faster start, because nobody is juggling emergency callouts.
Do roofers need a licence in ID?
Idaho requires contractor registration with the Idaho Contractors Board, part of the Division of Occupational and Professional Licenses, for any construction work of $2,000 or more in combined labour and materials. It is a registration rather than a licence. Registration requires proof of $300,000 general liability insurance and a fee, but no trade examination. Idaho does not test roofing competence at state level, so a registration number confirms that a contractor is insured and on the register, not that anyone has assessed its work. Within 60 days of registering, the number must appear on contracts, advertising, permits, letterheads and purchase orders and at the place of business; because it is written on the building permit, which must be posted at the site, it also reaches the job.
What should I check before hiring a roofer in Twin Falls?
Idaho Code 54-5213 stops cities and counties from starting new contractor licensing programmes after 1 January 2007, but some older city programmes still run: Idaho Falls, for one, requires roofers to hold a city Class D licence, earned by passing an ICC code exam, a relevant degree or reciprocity, as well as state registration. Elsewhere, check the state registration and the local building permit. An unregistered contractor commits a misdemeanour and cannot sue for payment.
A wind-country roof market with a light-touch code?
County records for Twin Falls and Jerome show 28 damaging wind reports against ten hail reports over the decade, with measured gusts of 77 mph on I-84 near Hazelton in 2020 and 79 mph at the Hansen Bridge in May 2025. In October 2019 about 30 power poles came down along Highway 93 between Twin Falls and Shoshone.
Is Twin Falls a hard market to find a good roofer in?
On the Snake River Plain the roof threat is wind: damaging wind reports outnumber hail almost three to one, and on 17 December 2025 a rare winter squall line gusted to 68 mph at the airport, ripped a roof off in Bliss and critically injured two children at a school bus stop. Yet Twin Falls requires no permit for a reroof, no ice and water shield, and Idaho bars any code tougher than the national model. Only one certified firm appears in the directory for the area, and it is ranked.
Is wind or hail the bigger risk to a roof in Twin Falls?
Wind, by a wide margin. The Twin Falls, ID statistical area logged 28 severe thunderstorm and high wind reports against 10 hail reports of an inch or more between 2016 and 2025. Wind damage shows up at the rake, ridge and edge rather than across the field of the roof, so the fastening schedule and edge detail matter more here than the impact rating of the shingle.
Roofer rankings for other metros
The Roofing Brief scores certified roofing contractors in U.S. metropolitan and micropolitan areas on the same formula.
- Best roofers in Boise, ID, about 114 miles from Twin Falls
- Best roofers in Idaho Falls, ID, about 138 miles from Twin Falls
- Best roofers in Logan, UT, about 146 miles from Twin Falls
- Best roofers in Coeur d’Alene, ID, another ID metro on the same formula
- Best roofers in Lawrence, KS, a metro of comparable size
- Best roofers in San Angelo, TX, a metro of comparable size
- Best roofers in Ogden, UT, also scored, about 158 miles away
- Best roofers in Salt Lake City, UT, also scored, about 180 miles away
See the full index of metro roofer rankings, or read how to find and vet a roofing contractor anywhere in the country.
Cite this analysis
The Roofing Brief. “Best Roofers in Twin Falls, ID: The Roofing Brief Contractor Score.” Published October 2026. Inputs: GAF certification registry; NOAA Storm Events Database 2016-2025; U.S. Census Bureau Vintage 2024 population estimates; Better Business Bureau and independent review-platform records for each ranked contractor.