As jurisdictions across Lower Alabama begin transitioning from the 2021 to the 2024 ICC Code Cycle, it’s crucial that our regional code officials, inspectors, and stakeholders understand the most significant changes in the Mechanical, Energy, Building, Plumbing, and Fuel Gas codes.
These updates aim to improve safety, boost efficiency, and clarify enforcement throughout the built environment. This article highlights key points to help with the transition process.
⚠️ Please remember: This is not an exhaustive list of changes. The final adoption and enforcement of any code provision lies with the local authority having jurisdiction (AHJ). Please confirm with your city or county building department before implementation.
🛠️ Key Updates by Code Area
Plumbing (IPC 2024)
- Tracer wire for buried plastic sewer piping – Plastic lines must include 14 AWG insulated copper tracer wire, critical for locating piping in rural and coastal sandy soils.
- Vacuum testing for DWV systems – A safer, weather-independent alternative to water/air testing for drain, waste, and vent systems.
- Protection from expansive soil – Although not widespread in our region, buried piping must be protected where applicable in certain inland areas.
- Showerhead flow rate capped at 2.0 GPM – Aligns with ongoing water conservation efforts in both rural and urban developments.
- Locking options for multi-user toilet facilities – Enhanced security with emergency accessibility—a critical update for schools, shelters, and public-use facilities.
- Material upgrades – Additional fire and chemical resistance standards for components such as plastic drain pans and solvent-cemented joints.
Mechanical (IMC 2024)
- Ductless range hoods now permitted – Broader allowances in Group I-1 and I-2 occupancies could benefit senior living, rehab, and medical facilities in our area.
- Recognition of low-GWP refrigerants – Systems using A2L and B2L refrigerants (e.g., R-32, R-454B) are now addressed with clear design criteria and safety protocols.
- Grease duct definition clarified – Essential for food service facilities throughout Baldwin and Mobile counties.
- Outside air ventilation now tied to ASHRAE 62.2 – Improves air quality standards for homes and multifamily units—important in our humid Gulf environment.
- Common duct negative-pressure requirement – Ensures better exhaust performance in multi-unit buildings, reducing cross-contamination risk.
Fuel Gas (IFGC 2024)
- Approved leak detection methods required – Open-flame testing is now prohibited. Instead, electronic or approved fluid methods must be used—enhancing inspector and jobsite safety.
- Abandoned gas piping must be purged – A necessary safety update as more systems are being transitioned from gas to electric.
Energy & Building (IECC / IBC 2024)
- Efficiency requirements increased – Alignments with ASHRAE 90.1-2022 affect insulation, HVAC performance, and lighting—particularly in commercial design.
- Expanded lighting controls – Occupancy sensors, daylight-responsive dimming, and zone lighting now apply in more building types.
- Submetering requirements expanded – Applies to buildings 10,000 sq. ft. and larger—relevant for regional hospitals, schools, and retail developments.
- Enhanced air leakage and humidity control – These changes help reduce long-term moisture issues—especially important in our high-humidity climate zones.
📍 Why These Changes Matter for Code Officials in Lower Alabama
As construction technologies, climate concerns, and industry practices evolve, these updates help ensure our regional codes stay current and responsive. Here’s why these changes are especially important for code enforcement in our communities:
✅ Safety Amplifications
Whether it’s propane purge practices, better-defined ventilation systems, or emergency access in toilet rooms, these updates aim to protect public welfare in homes, businesses, and public facilities.
✅ Enhanced Clarity & Accessibility
Code formatting and layout enhancements—including QR code links and a streamlined index—make it easier for inspectors and contractors to access and use the correct information on site.
✅ Resource Efficiency & Sustainability
Updates to shower flow limits, building envelope requirements, and renewable readiness help reduce waste and operating costs—supporting both environmental responsibility and homeowner affordability.
✅ Modern System Compatibility
New refrigerant classifications, low-GWP system support, and enhanced testing methods bring our codes in line with current technologies and industry trends.
✅ Clearer Jurisdictional Enforcement
By refining terminology (e.g., “grease duct”) and improving code structure, the 2024 codes help reduce variance in interpretation—supporting consistent inspections and enforcement across our counties.
✅ Recommended Actions for Code Officials and Local Departments
To ensure a smooth and successful transition across Lower Alabama, COLA recommends the following actions for local jurisdictions and inspection teams:
- Host Targeted Workshops
- Hold sessions focused on specific code disciplines (Plumbing, Mechanical, Electrical, etc.) for both code officials and local contractors.
- Update Code Manuals and Checklists
- Revise internal references, checklists, and field manuals to include new standards such as vacuum testing, tracer wire, new refrigerants, and purge protocols.
- Revise Inspection Forms
- Ensure inspection checklists and permit applications reflect the updated requirements—especially in plumbing and mechanical areas.
- Plan Outreach and Training
- Coordinate informational sessions with builders, engineers, and design professionals. Consider hosting regional forums to share best practices across jurisdictions.
- Promote Digital Tools
- Encourage staff and contractors to utilize QR codes and digital resources now embedded in the updated ICC publications—saving time and improving compliance accuracy.
⚠️ Final Reminder: Authority Lies With the Local AHJ
While the ICC provides a comprehensive update in the 2024 code cycle, it is the local authority having jurisdiction (AHJ) that determines:
- Which codes are adopted;
- Whether any amendments are made;
- When those changes become enforceable.
- Always verify locally before applying or enforcing any provision.
🏗️ Moving Forward Together in Lower Alabama
The 2024 ICC Code Cycle brings opportunity—not only for improved safety and efficiency, but also for greater consistency across our region’s growing communities. By staying informed and coordinating across jurisdictions, we can lead the way in safe, resilient, and forward-thinking construction practices.