If you have energy-efficient Low-E windows and are wondering whether you should add solar screens, you’re not alone. Many homeowners in sunny, hot climates like Texas or Arizona ask this question when trying to stay cool and save on energy bills. The good news is that Low-E windows already do a lot of the work—but solar screens can still help in certain situations. Let’s break it down in simple terms so you can decide what’s best for your home.

What Are Low-E Windows?

Low-E stands for “low emissivity.” These windows have a special invisible coating that helps control heat and light coming through the glass. In the summer, they reflect the sun’s heat to keep your home cooler. In the winter, they help trap indoor heat inside, making your home more comfortable year-round. Most modern energy-efficient windows come with Low-E glass and are often double- or triple-paned with gas fills, which adds even more insulation.

Because of this, Low-E windows already block up to 97% of harmful UV rays and reduce solar heat gain significantly—sometimes as much as 40–50% compared to regular glass. That means less fading on your furniture and lower cooling costs without needing extra help.

So, Do You Still Need Solar Screens?

In most cases, the answer is no—solar screens are not required if you already have quality Low-E windows. Your windows are already designed to handle Texas heat and strong sunlight. However, there are a few situations where adding solar screens might still make sense.

When Solar Screens Can Help

If your home gets intense afternoon sun—especially on west- or south-facing windows—solar screens can provide an extra layer of protection. They block heat before it hits the glass, which means less heat builds up on the window surface. This can be helpful in reducing indoor temperatures even further, especially in rooms that feel hotter than the rest of the house.

Solar screens can also improve privacy and reduce glare on TVs or computer screens, making them useful in living rooms or home offices. Some people like how they look from the outside, giving the home a clean, uniform appearance.

When Solar Screens Aren’t Worth It

If your main goal is energy savings, adding solar screens over Low-E windows usually offers only a small improvement. Since Low-E glass already blocks most heat and UV rays, the extra benefit from screens is limited. You might save a little more on cooling, but not enough to justify the cost for many homeowners.

Also, solar screens can make your home darker inside, especially if you choose a denser mesh. This might mean you need to turn on lights during the day, which could cancel out some energy savings. They can also block your view and require regular cleaning to remove dust and debris.

Another thing to consider: in winter, solar screens can block the sun’s warmth, which Low-E windows are designed to let in to help heat your home naturally. Some homeowners remove screens seasonally, but that adds extra work and maintenance.

What About Window Film?

Some people consider window film as an alternative. But just like solar screens, applying film over Low-E windows is usually not needed—and it can even cause problems. Some films trap heat between the glass and the coating, which may lead to the window cracking or the seal failing, especially in older or lower-quality units. Most window manufacturers warn against adding film because it can void the warranty.

The Bottom Line

If you already have modern Low-E windows, you probably don’t need solar screens. Your windows are already doing a great job keeping your home cool and energy-efficient. But if you have a particularly sunny room that stays too hot, or you want more privacy and glare control, solar screens can be a helpful addition.

Before making a decision, think about your comfort, how much sun your home gets, and whether the small extra savings are worth the cost and maintenance. In most cases, sticking with your Low-E windows and using blinds, shades, or curtains when needed is the simpler and more cost-effective choice.

Final Thoughts

Low-E windows are one of the best upgrades for energy efficiency in hot climates. They’re designed to handle the sun’s heat without needing extra help. Solar screens can add a little more protection, but they’re not a must-have. Focus on using your existing windows wisely—close blinds during the hottest part of the day, use ceiling fans, and keep your HVAC system well-maintained. That’s often the easiest way to stay cool and save energy all summer long.