Using Roller Shutters for Heat Protection: Tips for Hot Days
On hot days, Roller Shutters are the most effective way to keep rooms cool over the long term. As an exterior sunshade, Roller Shutters block the sun’s rays before they even enter the living space. Here are 5 tips on how to use Roller Shutters effectively in hot weather to protect yourself as best as possible from uncomfortable heat.
Would you like to use Roller Shutters to keep your living spaces pleasantly cool in the summer? Then let a ROMA Distributor near you advise you on the right Roller Shutter system.
Table of contents
Using Roller Shutters for Heat Protection: The Most Important Points at a Glance
Roller Shutters block sunlight before it reaches the windowpane, thereby preventing interior spaces from heating up.
By closing them in a timely manner, ventilating properly, and using an appropriate control system, the heat-protection effect can be significantly improved.
The material and color of the roller shutter curtain can influence how effectively they block heat.
Smart control systems ensure that Roller Shutters automatically respond to sunlight and temperature.
Solar-powered Roller Shutters provide effective heat protection without requiring additional mains power and are also suitable for retrofitting.
How Roller Shutters Keep the Heat Out
In the summer,windows are a building’s biggest weak point —not because of a lack of insulation, but because of direct sunlight. Sunlight hits the glass, passes through it largely unimpeded, and spreads throughout the room. Walls, floors, and furniture heat up and continuously release this heat into the room’s air.
Roller Shutters address the problem right at its source: they shield the window before the sun’s rays can hit the glass. This makes exterior sun protection significantly more effective than interior sun protection such as venetian blinds or pleated shades.
Using Roller Shutters to Beat the Heat: 5 Tips
The effectiveness of Roller Shutters as heat protection depends largely on how smartly you use them. The following five tips will help you get the most out of your Roller Shutter system.
Tip 1: Close the Roller Shutters in time
A common mistake when using Roller Shutters for heat protection is closing them too late. If you miss the right time, you risk the room becoming uncomfortably hot. Ideally, you should lower the Roller Shutters in the early morning hours—at the latest, shortly after sunrise —before direct sunlight begins to shine in. Closing them early prevents heat from building up in the first place. This is more effective than any attempt to cool the room after the fact.
Tip 2: Don’t Close the Roller Shutters Completely in Hot Weather
Closing the Roller Shutters completely in hot weather isn’t advisable, as this has an undesirable side effect. With certain Roller Shutter Profiles, heat can become trapped between the glass and the Roller Shutter Curtain, transferring heat into the room. ROMA Roller Shutters feature Ventilation Slats with ventilation slits that prevent exactly that. They allow for minimal air exchange without letting in any significant amount of light. This ensures pleasant air circulation with ROMA Roller Shutters, even when they are fully closed.
Tip 3: Keep windows closed during the day
Opening the window on hot days feels intuitively right—but you’re better off not doing it. When the outside temperature exceeds the indoor temperature, warm air flows in through open windows and the slats in the roller shutter curtain, causing the room to heat up. The combination of closed Roller Shutters and closed windows, on the other hand, keeps heat and warmth out much more effectively than any brief ventilation during the midday heat. This keeps the heat out before it even reaches the window.
Tip 4: Cross-ventilate at night and early in the morning
Another effective tip for hot days is to take advantage of the drop in temperature at night. As soon as the outside temperature drops below the room temperature—which is usually after 9 p.m.— intensive cross-ventilation is recommended. If possible, open two windows on opposite sides of the room. You can raise the Roller Shutters to allow for maximum airflow. In the morning, as soon as the outside temperature rises again, lower the Roller Shutters and close the windows.
Tip 5: Use automatic controls
Anyone who leaves the house early in the morning and forgets to close the Roller Shutters often faces a nasty surprise when they return home on hot days. An automatic Roller Shutter control system—using a timer or a sun sensor —ensures that the Roller Shutters always open or close at the right time—regardless of whether anyone is home or not. This way, you’ll be greeted by a pleasantly cool home when you return.
What types of roller shutters does ROMA offer?
ROMA offers Roller Shutters for all kinds of installation situations —whether for new construction, renovation, or retrofitting. Here’s an overview of the three types of ROMA Roller Shutters:
Front-Mounted Roller Shutters
Front-Mounted Roller Shutters are installed on the outside of the window without penetrating the building envelope. Since the roller shutter box is mounted on the exterior of the facade , no thermal bridges are created. In the summer, the front-mounted roller shutters effectively keep solar radiation away from the window; in the winter, they reduce heat loss and thus lower heating energy consumption. They are suitable for both new construction and retrofitting on existing buildings.
Learn more about ROMA Front-Mounted Roller Shutters
Top-Mounted Roller Shutters
Top-Mounted Roller Shutters are installed directly onto the window frame and inserted into the window opening together with it. The box and the window form a compact unit, which has a positive effect on thermal insulation. Top-Mounted Roller Shutters blend flush with the facade and create a harmonious appearance without a separate box. They are particularly well-suited for new construction.
Angled Roller Shutters
Angled Roller Shutters are ideal for windows with sloped jambs, such as gable windows. They are also the right choice for other unusual window shapes where conventional Roller Shutters cannot be installed due to design constraints. This ensures that heat is effectively kept out in these cases as well.
Which Roller Shutters are best at keeping heat out? The importance of material and color selection
How effectively Roller Shutters protect against summer heat depends not only on the system’s design. The material of the Roller Shutter curtain also influences how much solar radiation is reflected or absorbed. At ROMA, you can choose between high-quality Roller Shutters with aluminum slats and those with plastic slats, both of which offer excellent heat protection.
Roller Shutters with Aluminum Slats
Aluminum Roller Shutters are characterized by high stability and durability. Their surface reflects a portion of the incoming solar radiation, so the curtain heats up less. Combined with the foam-filled Roller Shutter Profiles, this results in effective heat protection.
Roller Shutters with plastic slats
Plastic Roller Shutters consist of interlocking profiles, which are often foam-filled. Since plastic is a poorer conductor of heat than metal by nature, these roller shutters offer good insulation. They are easy to maintain, weather-resistant, and available in numerous designs—a proven solution for heat protection.
What role does the color of the Roller Shutters play?
In addition to the material, the color also influences Roller Shutters’ heat protection effectiveness. Light colors reflect a greater portion of the sun’s rays and heat up less than dark surfaces. White, silver, and other light colors, in particular, can help further reduce heat gain. That’s why it’s especially recommended—particularly for facades exposed to intense sunlight— to consider color selection alongside material when planning. ROMA offers Roller Shutters in a wide range of colors, allowing you to harmoniously combine heat protection with an attractive design.
ROMA Smart Home Solutions to Beat the Summer Heat
Automated controls help you use Roller Shutters even more efficiently as heat protection. If you choose electric Roller Shutters, you can control them using a Roller Shutter switch, a remote control, or an app . Operation becomes even more convenient when you integrate your Roller Shutters into a Smart Home system and have them respond automatically to sunlight, the time of day, or temperature. This way, your Roller Shutters close exactly when summer heat protection is needed—even when no one is home.
Sun sensors continuously monitor the current light intensity and automatically adjust the Roller Shutters to the appropriate position when sunlight is strong. In addition, timers ensure that windows are shaded as early as the morning hours, before the rooms start to heat up. When the outside temperature drops in the evening, the Roller Shutters open automatically again, helping the rooms cool down overnight.
ROMA is compatible with established Smart Home systems such as Somfy TaHoma, Loxone, KNX, and Elero. This provides ROMA Roller Shutters with intelligent control options that make operation particularly convenient.
Sustainable Roller Shutters from ROMA to protect against heat
Solar Roller Shutters from ROMA combine heat protection with environmental benefits. They are powered by standalone solar modules that are directly integrated into the system. A connection to the power grid is not required. This allows for installation without complex electrical work , and walls remain largely untouched—making solar Roller Shutters particularly appealing for retrofitting sun protection.
High-performance rechargeable batteries ensure that the Roller Shutters function reliably even during the darker months of the year. Those who retrofit their sun protection as part of an energy-efficient window renovation may even be eligible for government grants: Check your country's requirements for that.
Cooler Rooms in the Summer with ROMA Sun Protection
Whether Roller Shutters, External Venetian Blinds, or Textile Screens—ROMA offers the right solution for protection against summer heat for virtually any installation situation. High-quality materials, well-engineered designs, and modern drive technologies ensure that sunlight is effectively reduced. This noticeably improves living comfort.
If you, too, want to keep the summer heat out and are looking for the right sun protection, we recommend consulting a ROMA specialist partner. They’ll provide personalized advice tailored to your specific situation and needs. Use the ROMA dealer locator and get personalized advice today.
Frequently Asked Questions (FAQ) About Roller Shutters as Heat Protection
Do Roller Shutters really help keep the heat out?
As an exterior sunshade,Roller Shutters are among the most effective measures against summer heat because they block the sun’s rays before they reach the window —that is, before they even enter the room. Interior sun protection, such as curtains or pleated blinds, cannot physically achieve this, since the heat has already passed through the glass by that point.
When should you close your Roller Shutters in hot weather?
Ideally, the Roller Shutters should be lowered in the early morning hours, before direct sunlight begins to shine in—not only after the heat has already become noticeable in the room. If you consistently do this, you’ll prevent the room from heating up in the first place.
Should you close the Roller Shutters completely when it's hot?
With certain profile types, a fully closed Roller Shutter can cause heat to build up between the glass and the shutter curtain, which then transfers heat into the interior. ROMA Roller Shutter curtains with Ventilation Slats allow for a comfortable exchange of air and reliably prevent this effect.