The 2024 IECC storefront and window requirements set new energy performance standards that every architect, contractor, and building owner must understand. These changes reshape how aluminum storefront and window systems are specified, tested, and approved for compliance.
The updated International Energy Conservation Code (IECC) focuses on improving building envelope efficiency, requiring all fenestration systems to meet or exceed new U-factor and SHGC targets. For construction professionals, that means smarter material choices and more detailed documentation.
Why 2024 IECC Storefront and Window Requirements Matter
Under the 2024 IECC storefront and window requirements, thermal performance must be clearly demonstrated using verified test data. Every system must now include U-factor and SHGC documentation at the design stage.
In practical terms, that means lower U-factors (better insulation) and tighter SHGC controls (less unwanted solar heat). Most commercial projects in the Mid-Atlantic and South Atlantic regions—where ECMI primarily operates—will need to specify:
Fixed or operable windows designed for improved thermal breaks and energy efficiency.
Glazed entrance systems that balance visibility, daylighting, and insulation.
Documented SHGC performance suitable for local climate zones to prevent overheating.
These performance values must be listed directly on construction drawings and verified through testing or recognized certification programs such as NFRC.
What This Means for Contractors and Architects
For contractors, code compliance no longer stops at the submittal stage. Inspectors are now verifying actual product ratings in the field. That means design-build teams must coordinate early with qualified fabricators who can supply accurate thermal data and complete documentation.
Architects should specify systems that already meet the new IECC thresholds, reducing the risk of redesigns or approval delays. Contractors, in turn, should confirm that storefront or window assemblies maintain equal or better performance if substitutions are made during procurement.
These performance values
must be listed directly on construction drawings and verified through testing or recognized certification programs such as NFRC.
How ECMI Supports Code Compliance
At East Coast Metal Investments, our team helps simplify this process from design through installation. ECMI’s aluminum storefronts and uPVC/aluminum window systems are engineered to meet or exceed IECC 2024 requirements for U-factor and SHGC performance.
Our design and engineering support services include:
Providing verified performance data for all fenestration products.
Offering thermally broken framing systems that improve insulation and comfort.
Assisting with submittal packages, documentation, and coordination with code officials.
Helping general contractors and architects select energy-efficient glazing options that align with their project’s climate zone.
We also provide professional powder coating finishes that meet AAMA 2604/2605 standards—ensuring long-term durability and color retention, even in coastal or high-exposure environments.
The Bigger Picture: Efficiency That Pays Off
Beyond code compliance, energy-efficient storefronts and windows deliver measurable financial benefits. The U.S. Department of Energy reports that improved fenestration systems can reduce HVAC energy use in commercial buildings by up to 20 percent annually.
For owners and property managers, these savings accumulate over time through lower utility costs and more stable interior comfort levels. In addition, energy-efficient design supports sustainability goals and contributes toward LEED and ENERGY STAR certification points.
Final Takeaway
The 2024 IECC is raising the bar for performance—and for accountability. Choosing a partner who understands both the technical and regulatory aspects of building envelope systems is critical to avoiding costly project delays and compliance issues.
East Coast Metal Investments provides engineered aluminum and uPVC systems that combine aesthetics, durability, and verified efficiency. Our team works closely with contractors and architects to help every project meet energy code requirements with confidence.
Looking for IECC-compliant storefront or window solutions?
Contact ECMI’s team at eastcoastmetalinvestments.com or visit our Rocky Mount, NC office to discuss your next project.