Shutters and insulation: How to heep Heat and cold out

Share this article

Roller shutters are no longer just an aesthetic feature. Today they truly contribute to an energy-efficient home. When properly installed, insulating roller shutters outside keep the cold out in winter and block heat in summer. That way you enjoy greater comfort, lower energy consumption and an improved EPC rating. In this blog you’ll discover what the insulating effect of roller shutters really means, how many degrees difference they can make, and why Harol roller shutters are a smart choice for anyone who wants to combine energy and comfort.

What exactly do roller shutters do for your insulation?

A roller shutter creates an additional barrier between the outside air and the glass. When the shutter is closed, a layer of air forms between the window and the slats. That still air serves as a natural insulator. The result: less heat lost in winter and reduced overheating in summer.

💡 Did you know that closed roller shutters can make a difference of several degrees in indoor temperature, both in winter and summer?

Do roller shutters keep the cold out in winter?

Absolutely. Roller shutters act like an extra insulation shell. Especially for large glazed surfaces you’ll clearly notice the difference: more heat stays in, and cold air is kept out. You’ll feel it immediately in your home comfort and energy usage.

Winter benefits:
• Less heat loss through windows
• Lower heating bills
• Reduced cold draft effect on large glazed surfaces
• Stable indoor temperature

Roller_Shutters_Rolluiken_Rollläden_Volets_Autumn

And in summer?

On hot days, closed roller shutters block the sun’s rays. As a result your home heats up less and remains comfortably cool inside. Combine that with automatic control or home automation and your roller shutters respond themselves to sun and temperature. Smart and energy efficient.

Do roller shutters affect your energy rating?

Yes, indirectly. Roller shutters improve the insulation value of your windows, meaning less heat is lost. This translates into lower energy consumption and a better energy score. The insulating effect of roller shutters thus contributes to an energy-efficient home, without major renovations.

Insulating roller shutters versus double glazing

A frequently asked question: “Are roller shutters better than double glazing in terms of insulation?” The answer: they complement each other. Roller shutters don’t replace glass, but they do increase the total insulation value of your windows. Especially at night or on cold days they offer extra protection against heat loss. In summer they block solar radiation even before it reaches the glass — something glass alone cannot do.

Which roller shutters insulate best?

If you are researching which roller shutters offer the best insulation, you should focus on three key points:

Insulating slats – filled with high-quality foam that resists heat and cold.
Perfect sealing – between the box, guides and bottom rail to avoid thermal bridges.
Correct installation – custom-installed by a professional so that no gaps or air leaks remain.

At Harol each roller shutter is custom-made and equipped with slats featuring a high-quality insulating core. That ensures optimal performance and a clean façade result. Harol offers four types of roller shutters: surface-mounted shutters, built-in roller shutters, built-on roller shutters and flush-mounted roller shutters.

Solar-powered roller shutters

More and more people choose solar-powered roller shutters. They operate completely wirelessly, are easy to install and use only solar energy. Some wonder if solar roller shutters have any drawbacks. In practice they are minimal: the panels require enough sunlight but even under diffuse light they charge well. The comfort and sustainability make solar roller shutters an excellent choice.

Roller shutters also insulate against noise

Roller shutters provide not only thermal but also acoustic insulation. The search behaviour around “roller shutters insulating against noise” has not increased by chance: in urban environments a closed shutter contributes to a quieter indoor climate. The air layer between the window and the slats dampens disturbing street noise, so you can truly relax inside.

Why Harol?

Harol roller shutters are designed with comfort, sustainability and Belgian quality in mind.

• Insulating slats with a high-quality foam core
• Minimal energy loss thanks to perfect sealing
• Durable and low maintenance
• Optional solar power or smart control

So you can enjoy a comfortable indoor temperature all year round, lower energy consumption and increased living comfort.

Conclusion: a smart investment in comfort and energy

Roller shutters are much more than just a sunshade or privacy solution. They form an efficient insulation layer that keeps heat and cold out, dampens noise and lowers your energy consumption.
With insulating roller shutters from Harol you choose smart technology, Belgian quality and sustainable comfort — summer and winter.

Discover the Harol roller shutter range at a local distributor and experience the difference of a well-insulated home.

Find a distributor