Radiant Barrier Installation in Sunnyvale, CA

If your upstairs feels stuffy all summer or your AC runs nonstop but never quite cools the house, your attic could be the culprit. The roof absorbs sunlight throughout the day, and without protection, that heat radiates straight into your attic. From there, it filters down into your home, making your HVAC system work much harder than it should. In Sunnyvale, where warm, dry days are common from late spring through fall, this can be a real challenge.

EM Energy & Air installs radiant barriers to help Sunnyvale homeowners get control over attic temperatures and energy costs. This type of insulation add-on can make your attic 20 to 40 degrees cooler during hot months—and that can make a huge difference inside your home. If you’re interested in a free inspection and quote, we’d be happy to stop by and take a look.

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What Makes Radiant Barriers Different?

Unlike fiberglass or cellulose insulation that slows down heat transfer, a radiant barrier reflects heat before it ever enters the home. It’s usually made from a layer of reflective foil that bounces radiant energy away from the roof surface. Think of it like putting a sunshade in your car windshield—it doesn’t stop the heat completely, but it dramatically cuts down on how much heat builds up inside.

By reflecting solar radiation before it enters your attic, a radiant barrier acts as your first line of defense. This gives your insulation a break and reduces the burden on your cooling system. When combined with proper attic insulation and duct sealing, it contributes to a cooler, more energy-efficient home.

If your attic is already well-insulated but still uncomfortably hot in the summer, a radiant barrier could be the missing piece in your thermal protection strategy.

Choosing the Right System for Your Home

Every attic in Sunnyvale has its own configuration, and we’ll help you decide which radiant barrier setup makes the most sense for yours. During our free consultation, we assess the condition of your roof, insulation, ventilation, and attic layout before making a recommendation.

Traditional Foil Barriers

Foil-based radiant barriers are highly effective and work best in attics with accessible rafters. We typically attach the foil to the underside of roof framing or lay it over the attic floor, depending on your goals and access points. We use American-made materials from trusted brands like EcoFoil® and RadiantGUARD®, which offer dependable performance for many years.

Spray Coatings for Tight Spaces

Some attics are too compact or oddly shaped for foil rolls. In those cases, we might recommend a liquid radiant barrier that we apply with a specialized sprayer. One popular product is HeatBloc Ultra®, which forms a thin reflective coating on the underside of the roof. While the reflectivity is slightly lower than foil, it’s a practical solution for awkward spaces.

Radiant Sheathing for Roof Replacements

If you’re replacing your roof or building a new home, radiant barrier sheathing is worth considering. These roof panels come with foil pre-bonded to the wood and are installed during the construction phase. LP TechShield® and similar products allow you to build in radiant protection from day one.

When Is the Best Time to Install a Radiant Barrier?

Radiant barriers can be installed year-round, but many homeowners choose to do the work during spring or fall. These are ideal times because the attic isn’t as hot, and crews can work more comfortably and safely. It also positions your home to benefit fully during the next wave of summer heat.

That said, if your AC has been overworked this season or you’re tackling other energy upgrades now, there’s no wrong time to add a radiant barrier. We’re equipped to handle the job quickly, with most installations taking only a day.

We also offer radiant barrier installation as part of larger energy efficiency projects. If you’re getting new attic insulation, ductwork repairs, or HVAC upgrades, we can often bundle radiant barrier work into the same timeline and simplify the entire process.

Long-Term Benefits of Radiant Barrier Installation

Homeowners in Sunnyvale who add a radiant barrier often notice the benefits right away. Lower energy bills are one of the biggest changes—because less heat enters the home, your cooling system doesn’t have to run as frequently. Over time, this also leads to a longer HVAC lifespan. When your system isn’t under constant stress from battling attic heat, it experiences less wear and tear and is less likely to break down unexpectedly.

You’ll also notice more even temperatures throughout the house. Rooms on the second floor or those facing the afternoon sun stay cooler, even during heat waves. A radiant barrier also helps your existing insulation do a better job. By reducing the thermal load in the attic, you help preserve the insulation’s condition and effectiveness. Finally, radiant barriers can contribute to better air quality by limiting moisture buildup. Cooler attics are less likely to trap humidity, which means less chance of mold or mildew forming in poorly ventilated areas.

We Make It Easy—And Stand Behind Our Work

At EM Energy & Air, we pride ourselves on providing complete, honest service from start to finish. Our initial inspections are free, and we take the time to explain your options in plain language. If you choose to move forward, we use high-quality, American-made products and back up our labor with one of the best warranties you’ll find anywhere in the Bay Area.

Whether you need radiant barrier installation, attic insulation, duct sealing, or HVAC repairs, we’re your go-to team. Most of our work is completed in one day, and you’ll never deal with hidden fees, surprise charges, or vague estimates.

Schedule a Free Radiant Barrier Estimate in Sunnyvale

If your attic is cooking your house from the top down, it’s time to take action. A radiant barrier can help you reclaim comfort, protect your cooling system, and stop wasting energy through the roof. Reach out today to schedule your free radiant barrier inspection and estimate.

We’ll take a close look, answer your questions, and offer a no-pressure quote that includes everything—labor, materials, and taxes.

Areas We Serve Near Sunnyvale

In addition to serving homeowners in Sunnyvale, we also work in surrounding areas including:

Mountain View, Santa Clara, Cupertino, Los Altos, West San Jose, Lakewood Village, and Ponderosa Park. Whether your home is tucked into a quiet neighborhood near El Camino or you’re in the heart of tech country, we’re just around the corner and ready to help.