By the time August arrives, a large commercial roof in California has spent months under intense sun. For warehouses, manufacturing plants, distribution centers, and other large facilities, all that solar exposure can add to indoor heat and increase cooling demand.
A cool roof coating helps by reflecting more sunlight away from the roof. When the existing roof is a good fit for restoration, the coating can reduce the amount of heat the roof absorbs while providing a protective surface.
Your roof can have a direct effect on how much heat enters the building, which can add to the strain on your cooling system during the hottest months. If summer energy bills are climbing, it is worth looking beyond the HVAC system and considering whether your roof is part of the issue.
The right commercial roofing strategy can help reduce heat gain while also protecting the roof itself. Universal Coatings has been helping California commercial property owners address these kinds of roofing needs for more than 45 years. Here’s what you need to know.
A Cool Roof Coating Keeps More Solar Heat Out: Here’s How
When sunlight hits a roof, some of that energy bounces away and some is absorbed. The absorbed energy turns into heat, which can raise the roof surface temperature and move through the roof assembly toward the building.
Two terms help explain how a cool roof system performs:
- Solar Reflectance: Tells you how much solar energy the roof reflects
- Thermal Emittance: Describes how well the surface releases heat it has absorbed
The Cool Roof Rating Council uses these properties when it publishes cool-roof ratings for roofing products.
A reflective roof coating can limit roof heat absorption by sending more solar energy away from the building. That matters for a commercial flat roof that has thousands of square feet exposed to direct sunlight.
Universal Coatings uses reflective coatings as part of its roof restoration coating systems. These systems are designed to reflect more solar energy, reduce heat absorption, and add weather-resistant protection to an existing roof.
Peak Summer Heat Puts Reflective Roof Coatings to Work
During a hot afternoon, an exposed roof can absorb heat for hours. Part of that heat can move toward the building interior, adding to the HVAC cooling load. Your cooling equipment then has more heat to remove, which can be tricky when outdoor temperatures are already high.
This is especially important during long stretches of summer weather in Fresno County and the Stockton area. High temperatures and direct sun can contribute to heat-related roof damage on Central Valley facilities.
Large facilities in Los Angeles County can face similar concerns. Broad, low-slope roofs receive hours of sun, and that exposure can add to the heat a building must manage. Reflective roofing can reduce one source of heat entering the facility.
Federal guidance on cool roofs reports that cool roofing can lower annual air conditioning energy use in some single-story buildings in warm or hot climates. Actual cooling costs depend on the building’s insulation, roof assembly, HVAC equipment, operating hours, and local weather.
For warehouses and plants, those factors should be considered along with the needs of the industrial roof system.
Cooling Savings Depend on More Than the Coating Color
A light-colored roof may look reflective, but appearance alone doesn’t tell you how the product will perform. As you compare options, take a look at product data to understand how much solar energy the roof can reflect, how well it releases absorbed heat, and whether that performance holds up as the surface ages.
Keep in mind that your building also plays a large role in the final result. Existing insulation, operating hours, HVAC efficiency, local climate, and roof condition can all affect commercial building energy costs even after a coating project.
The condition of the reflective surface matters over time as well. Dirt, weather, wear, and maintenance can affect its performance. A facility manager should plan for routine roof checks instead of treating the coating as a one-time project.
From large-scale commercial projects to industrial facilities like plants, warehouses, logistics hubs, and food-processing sites, Universal Coatings’ work includes roof restoration and insulation systems planned around specific needs. Not sure whether a specific coating is right for your site? Contact us and we’ll evaluate your roof condition and coating options.
California Title 24 and Reflective Roof Coating Projects
If you’re considering a reflective roof coating in California, energy performance is only part of the decision. Certain commercial roofing projects may also need to meet cool-roof requirements under California Title 24, Part 6.
Those requirements can vary based on the project type, roof slope, climate zone, and compliance path. A reflective coating can help support cool-roof performance goals, but the coating alone does not determine whether the full project meets code.
For property owners planning Los Angeles roofing work or projects elsewhere in California, it makes sense to review code requirements alongside roof condition, coating performance, and long-term building needs.
Roof Restoration Can Address More Than Summer Cooling Demand
Lower heat absorption is one benefit of commercial roof coatings, but a restoration project can also help protect an existing roof from sun, weather, and daily exposure.
A UV-resistant roof coating or elastomeric roof coating can create a continuous protective surface over a compatible roof. Depending on the system, it can cover seams and penetrations that may otherwise become weak over time.
Commercial roof restoration can help you avoid replacing a roof before it’s necessary, as long as the existing system is still a good candidate for coating. For warehouses, plants, and distribution centers, that can mean less disruption to daily operations and an easier project to schedule.
Universal Coatings’ roof restoration system is designed to add weather protection, reflect UV rays, and help extend the life of qualifying roofs. We’ve installed more than 100 million square feet of roof coating systems and we put that experience to work for every client we serve.
Is Your Commercial Roof a Good Candidate for Coating?
Before choosing a roof coating system, you need to know what condition the existing roof is in. A professional evaluation should check for:
- Active leaks
- Trapped moisture
- Worn areas
- Drainage problems
- Damaged flashing
- Weak seams
- Past repairs
The contractor should also check the roof substrate and any coating already in place. These details affect product compatibility and the amount of repair or surface preparation needed before new material is applied.
Insulation needs a separate look. A reflective roof coating works at the outer surface by reducing solar heat gain. Insulation slows heat transfer through the building envelope.
If weak insulation is a major part of the problem, improving the building’s spray foam insulation may also deserve consideration. A spray foam roofing system can provide both insulation and a protected roofing surface.
A broader facility maintenance review can also help identify drainage, surface, and penetration issues before coating work is planned. That gives you a better basis for deciding whether energy-efficient roofing through restoration fits the building.
Lower Summer Cooling Costs With a Cool Roof Coating
If your August utility bills are rising from a large roof spending each day under direct California sun, consider a cool roof coating. Start by finding out whether the existing roof can be restored, which coating fits the roof, and how reflective performance supports your long-term building plans.
At Universal Coatings, we’ve served commercial and industrial properties for more than 45 years. Our California commercial roofing services include coatings, restoration, spray foam roofing, waterproofing, and maintenance.
To discuss reflective roof coating options for your property, call Universal Coatings at (877) 233-6300 to talk about your needs. You can also learn more about our company and its long history serving large commercial and industrial properties.
