Voltmax Energy Solutions in Luxembourg
Windows and external doors in Luxembourg
solution selection • professional installation • assistance with formalities
Comprehensive window and door replacement – from measurement to installation
We select, supply, and install energy-efficient PVC and aluminum windows, modern sliding systems, and robust entrance doors throughout Luxembourg. We offer solutions tailored to both modernized buildings and new developments – from classic windows to large terrace glazing that provides more natural light and conveniently connects the home’s interior with the garden.
We begin each project with a thorough measurement and understanding of the residents’ needs. We help select the right material, glazing type, opening method, color, hardware, and additional features. We pay attention not only to appearance but above all to thermal and acoustic insulation, safety, and everyday comfort.
We ensure careful installation, proper sealing, and adjustment of all components. We also help verify eligibility for available support programs in Luxembourg and prepare documentation for the planned renovation. This makes the entire process – from solution selection to completion – simpler, more transparent, and well-planned for the client.
DID YOU KNOW THAT…
The new window not only changes the appearance of the facade
A cold area near the window, drafts, street noise, condensation on windows, and high energy consumption often indicate that window frames no longer meet today’s expectations. Well-chosen windows and doors help reduce heat loss, improve building airtightness, and maintain a more comfortable indoor temperature year-round.
However, product quality alone is only part of the equation. Accurate measurements, matching the solution to the wall and insulation, and properly executed installation joints are equally important. That’s why at Voltmax, we treat window and door replacement as part of a whole-house renovation, not simply replacing one frame with another.
Get started with a free consultation
Briefly describe what you need. You can add photos of your current windows or doors—we’ll contact you to discuss measurements and possible options.
Your benefits:
Heat and lower energy losses
Modern profiles, triple glazing and proper installation help keep the interior warm in winter and reduce overheating in summer.
More silence
Properly selected glass, seals, and profiles reduce noise transmission. This is especially important on busy streets, in densely built-up areas, or near an airport.
Safety and comfort
Reinforced profiles, locking points and proven fittings increase protection, while carefully selected mechanisms facilitate daily opening of even large sashes.
Design tailored to your home
PVC, aluminum, slim frames, large glazing, wood-effect colors and a wide RAL palette allow you to preserve the character of the building or give it a modern look.
Different methods, one result
Which windows should you choose?
PVC Windows – A Comfortable Choice for a Modernized Home
PVC windows offer a favorable balance of insulation, durability, and price. They are well-suited for homes, apartments, and multi-family buildings.
- Profiles up to 86 mm with an MD center seal; in selected configurations, Uw up to 0.72 W/(m²K);
- Energy-efficient triple-glazed units up to 52 mm thick;
- Innovative hardware and 4-point security in the presented configuration;
- Classic, wood-effect, and modern colors – single- or double-sided.
Best for: Modernizations where insulation and a reasonable budget are key.
Aluminum windows – slim profiles and larger glazing
Aluminum allows for the creation of large, rigid structures with a minimalist look. The slimmer profile exposes the glass and allows more light to enter.
- High profile rigidity and the ability to create larger structures;
- Energy-efficient triple-glazed units up to 72 mm thick;
- Proven hardware and 4-point security in the presented configuration;
- Several hundred color options from the RAL palette;
- Modern, light-weight visual effect and large glazing area.
Best for: modern homes, terraces, and large glazing areas.
Take advantage of the moment
Why is it worth acting now?
High energy prices and climate change make thermal modernization a necessity. Investing in it is a step towards energy independence, improved quality of life and savings. With the help of available subsidies, modernization can be more affordable than ever.
Comparison of PVC and aluminum
Compare options for Your Home
| Criterion | PVC | Aluminum |
|---|---|---|
|
Character |
Warm, versatile and economical |
Slim, modern and very stiff |
|
Duże formaty |
Good construction possibilities |
Good construction possibilities |
|
Appearance |
Classic or wood-like |
Minimalist, wide RAL palette |
|
Budget |
Usually more accessible |
Usually higher, depending on the project |
|
Application |
Renovations, houses and apartments |
Modern houses, large windows, premium architecture |
Large glazing and access to the terrace
More light, a comfortable passage to the garden and an open living space – the sliding system should be selected not only to suit the size of the opening, but also to the way the terrace will be used, the expected threshold and the budget.
PSK PVC - Slide and Tilt Function
An economical patio solution based on proven profiles. The tilt-and-slide mechanism allows for the comfortable movement of sashes weighing up to 200 kg, and the glazing unit can be up to 52 mm thick.
SLIDE PVC - a door leaf that opens parallel to the wall
A good solution when you want more space in the room. The sash doesn’t extend into the interior like in traditional balcony doors. The system can create structures up to approximately 4 meters wide and 2.6 meters high, depending on the configuration.
HS PVC - large doors and a comfortable low threshold
The lift-and-slide system allows for the construction of large patio doors—up to approximately 6 meters wide and 2.8 meters high. The mechanism facilitates the operation of doors weighing up to 400 kg, and the floor-integrated threshold improves the comfort of passage.
HS ALU - maximum light in a visually lightweight structure
The rigidity of aluminum allows for the creation of extensive glazing with modern proportions. Structures up to 6 meters wide and the ability to conceal the threshold in the floor are ideal for designs that open the living room to the terrace or garden.
Entrance doors
FIRST IMPRESSION. EVERYDAY COMFORT. A QUIETER HOME.
Entrance doors that complement the building’s style
Exterior doors should combine appearance with weather resistance, stability, insulation, and convenient closing. At Voltmax, we help you choose the material, color, panel, glazing, pull handle, hinges, and locking system to complement the facade and the way your home is used.
PVC doors – warm, stable, and versatile
Profiles reinforced with a 3 mm wide closed steel element;
HPL panels up to 62 mm thick, optionally with aluminum inserts;
Various hardware options, including automatic locking upon closing;
Hinges: swing, roller, or concealed;
Low aluminum threshold with thermal break.
ALUMORE STANDARD aluminum doors – a custom look
Aluminum provides high resistance to temperature changes and allows for the perfection of every detail. You can choose a color from a wide RAL palette, panel model, pull handle, hinges, and locking system – from classic to automatic or electronic options.
ALUMORE DOOR — Design and Technology
A line for those who want to combine minimalist form with advanced details. The overlay panel construction is weather-resistant, and standard locking at three key points enhances security. Standard, 3D, and Dual versions are available, along with optional opening solutions: fingerprint reader, touch panel, keypad, or Smart Home integration.
FIRST CHECK THE CONDITIONS. THEN ORDER AND INSTALL.
Klimabonus and assistance with formalities
Window replacement can be part of a subsidized energy retrofit.
In Luxembourg, replacing windows and balcony doors may qualify for the Klimabonus program if the building and the planned solution meet current technical and formal requirements. Window replacement can also improve a home’s energy performance, but it does not guarantee a specific energy class—the result depends on the entire building, its insulation, ventilation, and heating system.
Voltmax helps streamline the process: we review the project scope, the parameters of the proposed products, and the documents required to verify eligibility for subsidy. If cooperation with an energy consultant is required, we include it in the work schedule.
What you should know about the 2026 rules
- The program covers residential buildings in Luxembourg older than 10 years;
- Window replacement can be implemented as a single element of a simplified retrofit, under certain conditions;
- Accord de principe (in-principle) must be obtained before work begins;
- Specific glazing parameters are required, as well as meeting the requirements regarding the thermal quality of the wall/roof or mechanical ventilation;
- the amount and possibility of obtaining support depend on current regulations and the individual project.
Collaboration Process
From the first measurement to the finished installation
- Consultation and Needs Assessment
We discuss the problems with your current windows and doors, the desired comfort, the home’s style, the schedule, and the budget. You can immediately send photos and approximate dimensions.
- Measurement and Solution Selection
We verify the openings, installation method, and connection to the façade and insulation. We select the material, glazing, hardware, color, threshold, and accessories.
- Offer and Funding Path
Before work begins, we organize the required parameters and documents and indicate which project elements may be eligible for funding.
- Installation and Acceptance
We remove the old joinery, install the new elements, perform sealing and adjustments, and upon completion, we provide information regarding use and project documentation.
Why Voltmax
One company that looks at the whole home
Voltmax combines energy and construction expertise. This allows us to evaluate window replacement not only as a product purchase, but as part of a renovation that also includes insulation, roofing, heating, electrical installation, photovoltaics, and energy management.
- Company experience since 2016 and presence in Luxembourg since 2022;
- Customized solution selection instead of a single option for each home;
- Professional measurement and installation—critical for real energy efficiency;
- Assistance in organizing documents related to support programs;
- View selected windows, doors, and blinds in our showroom in Soleuvre;
- Comprehensive support for subsequent stages of home renovation.
+7,000 homes • +400 companies • +10 photovoltaic farms • +22 specialists
Showroom
SEE. TOUCH. COMPARE.
Choose windows and doors with greater confidence
Photos are helpful, but the differences between profiles, colors, handles, pulls, and mechanism operation are best appreciated in person. In the Voltmax showroom, you can view selected examples of windows, doors, and roller shutters, compare materials, and talk to a specialist about your home.
Address: 7 Place de l’Indépendance, L-4418 Soleuvre, Luxembourg
Frequently asked questions
Drafts, condensation, a cold area near the glass, noticeable noise, damaged seals, difficult operation, or high energy losses may be signs of a problem. During the inspection, we check whether replacement is necessary or whether adjustments and repairs to selected components will suffice.
PVC typically provides a very good insulation-to-price ratio and is suitable for most renovations. Aluminum is suitable for slim frames, large glazing areas, and modern architecture. The final choice depends on the size, exposure, visual expectations, and budget.
Yes. Our offer includes energy-efficient triple glazing units – up to 52 mm in selected PVC systems and up to 72 mm in selected aluminum systems. We tailor the parameters to the specific project.
It can improve energy performance and reduce heat loss, but the specific class depends on the entire building: walls, roof, ventilation, airtightness, and heating system. Therefore, we do not promise a specific class without an analysis.
Replacing windows and balcony doors may qualify for Klimabonus if the building, technical parameters, and procedure meet current requirements. We help verify the conditions and prepare the next steps before work begins.
Yes—under the current procedure, in-principle consent must be obtained before work begins. It is not advisable to sign documents or begin installation until the subsidy path has been properly verified.
The program clearly indicates windows and balcony doors. Eligibility for support for specific types of external doors requires individual verification—therefore, it is not automatically included in every offer.
Yes. The size, opening method, partitions, color, glazing unit, hardware, and accessories are selected to suit the specific opening and the customer’s expectations.
Yes. We offer PSK, SLIDE, and HS systems in PVC and aluminum. Depending on the solution, designs up to approximately 6 meters wide and with a low or concealed threshold are possible.
Yes. Selected windows can be equipped with roller shutters, an integrated mosquito net, and wired, wireless, or smartphone control via a compatible system.
Send us the form, photos, and approximate number of components. After a short consultation, we will schedule a measurement and prepare a proposal tailored to your project.