Service area
The center of our Arizona radius: postwar houses with flat roofs behind parapets, concrete tile on later subdivisions, and an average of 111 days a year at 100 °F or more.
The middle of the Salt River Valley and the point our 50-mile Arizona radius is measured from.
Elevation, incorporation, census and area are public record. The climate zone is Maricopa County's, from the county table in the International Energy Conservation Code.
Conditions
Phoenix averages 111 days a year at or above 100 °F. In 2024 it recorded 113 consecutive days at 100 °F or more, from May 27 to September 16, and a record 70 days at 110 °F or above. The all-time high is 122 °F, from June 1990. That heat and UV thin coatings, harden sealants and work flashings loose, so the wear points matter as much as the open roof.
The National Weather Service has set Phoenix’s monsoon season as June 15 to September 30 since 2008. Annual rain is about 7.22 inches on the 1991–2020 normals, and a third to half of it can fall in that season as short, heavy storms. On a flat roof behind a parapet the water has to reach a scupper or drain quickly. Ponding, blocked scuppers and stains at the base of the parapet are worth checking before July.
Monsoon thunderstorms can push a wall of dust ahead of the rain. On August 25, 2025, a haboob followed by wind and rain crossed metro Phoenix; the Associated Press reported a damaged terminal roof at Sky Harbor and more than 15,000 customers without power. Dust collects in valleys, gutters and roof drains, and the gusts load roof edges and loose tile. Check drains and edge metal after the season, not only after a leak.
Maricopa County publishes no special wind region list of the kind Riverside County does. The design wind speed for a Phoenix property comes from the ASCE 7 maps that the adopted building code references, looked up for that site. It decides fastening schedules, tile attachment and edge metal, so establish it for the actual address rather than reusing a figure from another project.
The roofs here
Many Phoenix houses and small commercial buildings have low-slope roofs hidden behind parapet walls, finished in spray foam, built-up or rolled roofing, or a coating over an older layer. From the street the roof cannot be seen, which is how ponding and cracked coatings go unnoticed for years. An inspection starts at the scuppers, the parapet caps and the seams where the roof turns up the wall.
Air conditioning made Phoenix’s postwar boom possible: more was built in 1959 alone than in the years from 1914 to 1946. Houses from that period may have been re-roofed several times, and some still carry roof-mounted cooling equipment. Establish how many layers are on the deck, what condition the deck is in and how the equipment curbs were flashed before pricing a new surface.
Concrete tile covers many of the subdivisions built after the postwar years. The tile usually outlasts what is under it: the underlayment is the part that ages, and it fails first at valleys, walls and penetrations. A tile roof that looks intact from the yard can still be letting water through. Lifting tiles at those points shows what the open field of the roof cannot.
Local building patterns help guide an inspection. Your roof’s actual condition, materials and repair history determine the recommendation.
Code and permits
Confirm the requirements for the building and proposed roof assembly. The links below go directly to the relevant authorities.
Phoenix City Council approved the 2024 Phoenix Building Construction Code on June 18, 2025, with an effective date of August 1, 2025. It adopts the 2024 International Building, Residential and Energy Conservation Codes with local amendments under Ordinance G-7397. Projects that began under the 2018 code may follow transition rules, so confirm which edition governs your permit.
Phoenix’s building code pageMaricopa County is in IECC climate zone 2B, hot and dry. Arizona has no statewide energy code like California’s Title 24: the energy rules for a roof are the ones in the IECC edition the city has adopted, applied in that zone. Building type and roof slope still decide which of them apply to a given project.
The county climate zone guideMaricopa County publishes no special wind region list, so there is no county figure to quote for Phoenix; the design wind speed comes from the ASCE 7 maps for the individual site. Look the address up and confirm the figure with the building department. Wind load rises with the square of the speed, so a few miles an hour changes what the fastenings, the perimeter and the edge metal have to carry.
ATC Hazards by LocationCity of Phoenix Planning & Development Department is the local authority for roofing permits. Establish the permit and inspection requirements for your project before work begins. Our Arizona license is ROC 367833.
City of Phoenix Planning & Development DepartmentCode editions and dates here are as each city published them. They explain what applies; they are not a site-specific design calculation. Confirm the governing edition and design criteria with the building department.
What we do
Flat roofs behind parapets point toward foam and recoating; tile houses toward underlayment work. The inspection decides which, and whether repair or replacement makes sense.
Additional roofing services for homes and commercial properties:
Anywhere within 50 miles of Phoenix, and the Coachella Valley in California. The whole service area
Free written estimate
Free written estimate. No obligation.
Prefer to talk? Call us.
(442) 637-5222Coachella Valley, California & Greater Phoenix, Arizona.
A 50-mile Phoenix radius, including Buckeye.
Arizona · License No. ROC 367833
Ask for insurance documentation and applicable warranty and maintenance options in writing before work begins.
