By Gary Stewart
In California, all commercial roofs must meet the minimum standards set by Title 24, particularly when it comes to energy efficiency. Regardless of the roof type, they must have a coating or a specific reflectivity value that helps reflect energy away from the building. This is essential in preventing roofs from absorbing heat throughout the day and releasing it at night, which used to be a common issue with darker roofs.
In the past, roofs were darker, absorbing more heat and causing higher temperatures inside the building. Title 24 has changed that, not only for roofs but for other building components like windows as well. Today, most roofs have a bright, white appearance to enhance reflectivity. Under a heat gun, older roofs would often reach temperatures as high as 120-130 degrees, but with the new reflective coatings, roof temperatures are reduced to about 85-90 degrees. This significant temperature drop boosts energy efficiency and helps reduce cooling costs. Overall, it has been a positive development for the state and for building owners.
Types of Energy-Efficient Roofing Materials
In addition to reflective coatings, California now requires an insulation barrier to further improve energy efficiency, and this is becoming increasingly common. The insulation works alongside the reflective coating to achieve two primary goals: reflecting energy away from the building and preventing internal air from escaping.
Insulation, typically made of foam, plays a critical role by trapping air and slowing down energy transfer through the roof. The effectiveness of the insulation largely depends on its density. For example, less expensive materials like styrene need to be applied in greater thickness to meet state standards, while denser, more efficient materials such as polyisocyanurate require less thickness due to their superior air-trapping properties.
One challenge we anticipate with these new insulation requirements is the need to adjust other building elements, such as raising air conditioning units, to accommodate the added insulation. This adjustment will be crucial to ensuring the overall efficiency and functionality of the building.
I advise anyone planning a new roof or building project to check with their local municipality for the latest Title 24 and insulation requirements. It is always better to be informed early on to avoid surprises when getting a roofing quote.
Benefits of Energy-Efficient Roofing
The biggest benefit of these roofing systems is the reduction in energy costs. Reflective roofs help lower the temperature difference between the interior and exterior, which reduces the load on air conditioners and heaters. As a result, building owners save money on heating and cooling, making the building more energy-efficient overall.
Maintenance Tips for Energy-Efficient Roofs
Maintenance for reflective roofs is generally the same as with any other roof, but we do place special emphasis on monitoring the condition of the reflective coating or outer layer. Maintaining this coating to protect the roof’s underlayers from UV exposure is essential, ensuring it continues to function properly and meet Title 24 standards. While cities do not require ongoing maintenance for Title 24 compliance, it helps the customer keep their building energy efficient and prevents premature roof deterioration.
Conclusion
Energy-efficient roofing is not just about meeting regulatory requirements like Title 24 but about creating long-term value for your building. Reflective coatings and proper insulation drastically reduce energy costs, enhance indoor comfort, and extend the roof’s life. With the right materials and maintenance, you will ensure your roof continues to perform optimally for years to come.
Whether you are planning a new installation or upgrading an existing roof, staying informed about the latest energy-efficient options and working with a quality roofer like SBR Roofing is critical to maximizing your investment.
Author Bio
As a proud fourth-generation commercial roofing contractor, Gary Stewart has dedicated his career to upholding his family’s legacy of quality and craftsmanship. Today, as a managing partner, he works alongside his relatives, blending tradition with innovation to deliver exceptional roofing solutions. His commitment to excellence and teamwork strengthens SBR Roofing’s projects and deepens those family bonds, ensuring that every roof we build is a testament to our shared values of integrity, durability, and service. Together, we are constructing roofs and building a future for our community and family lineage.
