Beginning April 1, 2026, the Texas Department of Insurance (TDI) began requiring residential Windstorm (WPI-8) projects to comply with the 2024 International Residential Code (IRC). While any code change can raise concerns, the good news is that most builders will see very little impact on their ARCXIS structural engineering plans.

The biggest changes involve roof deck protection, expanded Exposure D requirements for certain waterfront properties, and additional documentation during the windstorm inspection process.

Roof Deck Protection

One of the most noticeable changes from the 2018 to the 2024 IRC affects projects located in a “Wind Design Required” areas, generally where the Ultimate Design Wind Speed is 130 mph or greater. These projects now require enhanced roof deck protection assemblies to improve weather resistance if the roof covering is damaged during a high-wind event.

Several code-compliant roof deck protection methods are available, and ARCXIS has updated its engineering standards to reflect the new requirements. If you're building in higher wind-speed areas, our team can help you determine which approach is appropriate for your project.

Exposure D is Broader Than Before

Builders should also be aware that Exposure D is no longer limited to Gulf-front construction. Certain homes located near bays, canals, inland lakes, and other large bodies of water may now fall under these requirements.

Because eligibility depends on the property's location, production plans that work on one lot may require project-specific engineering on another. Identifying these conditions early can help prevent redesigns, permitting delays, and costly field changes.

Enhanced Inspection Documentation

The inspection process itself has not changed significantly, but documentation expectations have.

To support compliance, ARCXIS inspectors are expanding photographic documentation and field verification to capture critical installation details, product information, and fastening methods. These enhancements provide stronger support for engineering certifications and help streamline the issuance of the WPI-8 Certificate of Compliance .

Why Early Coordination Matters

Most builders won't need to redesign their homes because of the 2024 IRC. However, understanding when the new requirements apply can help keep projects moving and avoid unexpected delays.

Whether building in a high-wind area or on a site that may qualify as Exposure D, early coordination with ARCXIS helps identify potential issues before construction begins. Our engineers and inspectors stay current with evolving code requirements, so you can focus on delivery projects on schedule with confidence. Reach your local team at https://arcxis.com/markets