Energy-efficient window refurbishment: all information at a glance
Energy-efficient window retrofits are among the most effective measures for reducing energy loss in a building —while also improving living comfort and indoor climate. With its exterior sun protection systems—such as Roller Shutters, External Venetian Blinds, and Textile Screens —ROMA offers smart solutions that can be seamlessly integrated into a renovation plan. In this article, you’ll learn everything you need to know about requirements, U-values, funding opportunities, and implementation.
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Energy-efficient window refurbishment: the most important facts in brief
Why windows are so important for energy-efficient renovation
Requirements for the energy-efficient renovation of windows
What does the U-value mean for windows?
Subsidies for the energy-efficient renovation of windows: how you benefit
What role does external sun protection play?
ROMA solutions for your window refurbishment
Frequently asked questions (FAQ) about energy-efficient window refurbishment
Energy-efficient window refurbishment: the most important facts in brief
Energy Savings Through Window Replacement: Energy-efficient window upgrades sustainably reduce energy consumption and improve indoor climate.
Sun protection as a factor in energy efficiency: Exterior sun protection systems such as Roller Shutters, External Venetian Blinds, or Textile Screens contribute significantly to thermal insulation—in both summer and winter.
U-value as a measure of efficiency: A window’s U-value determines how much heat escapes—the lower the U-value, the better the insulation performance.
Why windows are so important for energy-efficient refurbishment
From an energy point of view,windows are weak points in the building envelope. Outdated glazing and inadequate frame insulation lead to heat loss in winter and overheating in summer. An energy-efficient renovation of these components provides a remedy - and increases the value of your property at the same time.
The measure is particularly effective in combination with external solar shading, as this has a positive effect on the indoor climate all year round: The heat stays inside in winter and outside in summer.
Requirements for the energy-efficient refurbishment of windows
If you want to meet the requirements for energy-efficient window refurbishment, you should consider the following aspects:
Modernize glazing: Replacing outdated single or double glazing with energy-efficient thermal insulation glazing is essential.
Use thermally insulated frames: High-quality frame profiles with optimized insulation values significantly improve the overall balance of the window.
Ensure professional installation: An airtight, thermal bridge-free installation in accordance with RAL guidelines is a prerequisite for the measure to be fully effective.
Add sun protection intelligently: External systems such as ROMA Roller Shutters or External Venetian Blinds increase the energy effect - especially in combination with Smart Home control of the sun shading system.
The direction of the windows and the physical properties of the façade also influence the renovation concept - individual specialist advice is therefore recommended.
What does the U-value mean for windows?
The U-value (heat transfer coefficient) is a key parameter in the energy-efficient refurbishment of windows. It describes how much heat is lost to the outside through a component - such as a window. The lower the U-value, the better the insulating effect and therefore the greater the energy efficiency.
Optimizing the U-value when renovating windows is a decisive step towards reducing energy requirements. In addition, the use of ROMA solar shading systems - such as Roller Shutters, Venetian blinds or Textile Screens - significantly increases the energy efficiency even further: in summer by reducing the heat input, in winter by reducing heat loss when the elements are closed.
What role does external sun shading play?
An often underestimated factor in window refurbishment is solar shading. This is because it not only acts as a heat shield in summer, but also influences the energy balance all year round:
Advantages of external sun shading with ROMA
Reduction of cooling costs in summer
Avoidance of overheating with large window areas
Optimization of daylight entry through controllable slats
Improved sound insulation and privacy
Compatible with Smart Home solutions
External sun shading therefore makes a significant contribution to the energy-efficient refurbishment of windows - in terms of technology, design and living comfort. Anyone who wants to reduce energy costs in the long term, improve the indoor climate and at the same time focus on high-quality design is making a future-proof decision with ROMA sun shading systems.
ROMA solutions for your window renovation
ROMA offers a wide range of sun shading systems that can be ideally integrated into energy-efficient refurbishment projects:
ROMA Roller Shutters: summer heat protection, darkening, burglar resistance
ROMA External Venetian Blinds: daylight control, glare protection at the workplace, heat regulation
ROMA Textile Screens: sun and heat protection, privacy protection with transparency
Smart Home-capable control for maximum comfort and efficiency
Energy-efficient window refurbishment pays off twice over: it reduces energy costs and increases living comfort - especially in combination with intelligent, external sun shading from ROMA. Whether new build or renovation - with ROMA you are making a decision for quality, durability and efficiency "Made in Germany".
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Frequently asked questions (FAQ) about energy-efficient window refurbishment
What is included in the energy-efficient refurbishment of windows?
Energy-efficient refurbishment involves replacing old glazing with modern thermal insulation windows, professionally insulating the connection areas and ensuring airtight installation. In addition, external sun protection significantly improves energy efficiency by keeping the heat out in summer and minimizing heat loss in winter.
What U-value is recommended for refurbishment?
A maximum U-value of 1.3 W/m²K is recommended for the energy-efficient refurbishment of windows - this corresponds to the current standard for energy-efficient buildings. If you want to renovate in a particularly sustainable way, you can opt for passive house windows with a U-value of ≤ 0.8, which offer maximum insulation and reduce energy costs in the long term.