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From Gulf Coast Winds to West Texas Heat

Access the most current Texas roof building codes, tailored to the address, county and ZIP code. OneClick Code delivers clear, jurisdiction-specific code requirements, storm history, and calculators (IWS, waste, ventilation) — all designed to save contractors time and money.

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Texas Roofing Code Highlights

Permit Thresholds

In most Texas counties, any re‑roofing project requires a permit, especially those involving decking or structural changes.
Permit fees and documentation vary by jurisdiction.
OneClick Code delivers ZIP-based permit fee estimates instantly, removing uncertainty.

Ice & Water Shield

Governed by IRC R905.1.2 / R905.2.7.
Required in select North Texas counties susceptible to ice, snow, or freeze events.
Must extend 24″ beyond the warm-side wall, consistent with standard code practices.

Fire and Wind Ratings

Must meet IRC R905.2.4.1 and ASTM D7158 or D3161 standards.
Class A fire-rated shingles are commonly required statewide.
Coastal regions adhere to stricter wind uplift design per ASCE 7.

Ventilation & Insulation Standards

Codes utilize IRC R806 / Energy Code:
- A minimum of 1 sq ft ventilation per 150–300 sq ft attic area is expected.
- Insulation R-values vary by region, with colder areas requiring higher thermal performance.

Texas Windstorm Insurance Association (TWIA)

Applies to 14 Gulf Coast counties (including parts of Harris County).
Roofing systems must be
TWIA‑certified to qualify for insurance in those zones.
Projects must use windstorm-resistant materials and approved installation methods.

Key Texas Counties for Roofing Contractors

High-impact zones

(Source: National Weather Service, SPC, and NHC— reflected by OneClick Code reports)

Harris County (Houston) – Elevated hurricane and flood exposure.
Dallas County (Dallas) – Persistent hail threats and occasional tornadoes.
Tarrant County (Fort Worth) – Frequent wind and hail storms.
Bexar County (San Antonio) – Occasional storms and hail seasons.
Travis County (Austin) – Intense summer heat, hail, and wind events.
Coastal Counties (e.g. Galveston, Jefferson) – TWIA mandates apply, demanding wind-resistant materials.

OneClick Code provides precise county-level code and permit intelligence to power resilient roofing jobs.

Key Texas Counties for Roofing Contractors

Why Texas Roofing Codes Are Complex

Texas spans a massive geographic and climate range from hurricane-exposed coastlines to scorching desert interiors. Coastal counties demand hurricane-grade roofing, while inland areas battle hail and heat. Local code variations between counties like Harris, Dallas, and Travis add to the complexity, meaning contractors must navigate different rules depending on location.

Hurricane-Force Winds

Coastal areas must use roofing systems engineered for severe wind uplift following ASCE 7 standards and ASTM D7158 or D3161.
TWIA (Texas Windstorm Insurance Association) certification is mandatory in many hurricane‑prone counties.

Hailstorms

Texas consistently records some of the highest hail damage in the US, driving code and insurance preferences for Class 4 impact‑resistant shingles.
Durable, hail-ready roofing systems aren’t just recommended, they’re often required.

Extreme Heat

Intense UV exposure and summer temperatures create a need for heat-resistant, reflective roofing materials.
Energy standards (IECC/IRC) push for higher thermal performance in roofing assemblies.

Varying Regional Climates

From humid Gulf Coast to arid West Texas, roofing codes differ widely by county.
OneClick Code delivers tailored, county-level code info and permit details. No more guesswork.

Your All-in-One Solution

OneClick Code

OneClick Code produces county‑specific roofing code reports complete with storm data, IWS/waste/ventilation calculators, permit fees, and insurance‑verified requirements like TWIA. Turn complex International Building Code (IBC) compliance into defensible estimates.

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