‍

California Title 24 and Glazing: What Architects and GCs Need to Know

A Practical Guide to Meeting Energy Code Requirements Through Smart Glass and Framing Choices

If you’re designing or building a commercial structure in California, Title 24 compliance is non-negotiable. As part of the state’s Building Energy Efficiency Standards, Title 24 sets strict requirements on the performance of a building’s envelope, including windows, curtain walls, storefronts, and skylights.

At Ramos Industries, Inc., we work closely with architects, general contractors, and energy consultants to ensure every glazing system we install aligns with Title 24 performance targets, without compromising on design, function, or budget.

‍

What Is Title 24?

Title 24, Part 6 of the California Code of Regulations outlines the minimum energy performance standards for both residential and nonresidential buildings. It covers lighting, mechanical systems, insulation, and most relevant here—fenestration and glazing systems.

The code is updated every few years to reflect changes in building science, climate goals, and energy modeling practices. The latest version emphasizes lower U-values, solar heat gain control, and visible light transmittance (VLT).

‍

How Title 24 Applies to Glazing

Commercial glazing systems must meet prescriptive or performance-based standards related to:

1. U-Factor

• Measures how well the window or glass system insulates
  
  
• Lower values mean better thermal performance
  
  
• Required values vary by climate zone and glazing type
  
  

2. Solar Heat Gain Coefficient (SHGC)

• Indicates how much solar radiation passes through the glass
  
  
• Lower SHGC helps reduce cooling loads in sun-exposed buildings
  
  
• Critical for west- and south-facing curtain walls or storefronts
  
  

3. Visible Transmittance (VT)

• Describes how much visible light passes through
  
  
• Must balance daylighting benefits with glare and heat control
  
  

4. Air Leakage Rate

• Fenestration systems must meet tested thresholds for air infiltration
  
  
• Proper sealant application and system integration are essential
  
  

Project Types Affected

If your commercial project includes more than 25 square feet of fenestration per space, it will likely trigger Title 24 requirements. Common project types include:

• Office buildings and tech campuses
  
  
• Retail and hospitality developments
  
  
• Schools, libraries, and civic buildings
  ‍
• Healthcare centers and public facilities
  

‍

Strategies for Glazing Compliance

✓ Use of IGUs (Insulated Glass Units)

• Combine low-E coatings, gas fills, and thermal spacers to meet U-value and SHGC targets
  
  

✓ Thermally Broken Aluminum Framing

• Reduces heat transfer and supports whole-assembly performance calculations
  
  

✓ Strategic Glazing Placement

• Position higher-performing glazing on sun-exposed elevations
  
  
• Use shading devices or ceramic frit to reduce heat gain without blocking daylight
  
  

✓ Partnering with a Qualified Glazing Contractor

• Ensures that product submittals, NFRC ratings, and field installation meet all documentation requirements
  
  

Ramos Industries’ Role in Title 24 Projects

We collaborate early in the design process to evaluate glass and framing options that will satisfy Title 24 without sacrificing aesthetics or constructability. Our process includes:

• Reviewing energy modeling reports and specs
  
  
• Coordinating NFRC-rated products from trusted manufacturers
  
  
• Providing accurate submittals and shop drawings
  
  
• Supporting AHJ submittals and third-party field inspections
  
  
• Ensuring precise, code-compliant installation
  
  

We’ve completed dozens of Title 24-compliant projects across California for clients in the public and private sectors, with a focus on long-term performance and seamless execution.

Planning a California Commercial Project?

If you’re an architect or GC involved in a project that includes significant glazing, Title 24 requirements must be factored in from day one. Choosing the right glazing partner can simplify compliance and ensure performance goals are met without costly rework.

Visit www.ramosindustriesinc.com to learn more or contact us today for guidance on Title 24-compliant glazing systems.

‍

‍