PVC vs Aluminum Windows in Luxembourg: 2026 Prices & Differences

PVC or Aluminum Windows in Luxembourg: A Key Decision for Your Renovation

In Luxembourg, energy renovation has become a priority, both to reduce bills and to increase the value of your property. The choice of window frames is crucial: they often account for up to 20% of a house's heat loss. In 2026, two materials dominate the market: PVC and aluminum. Each has its advantages, disadvantages, and specific costs. This article helps you see clearly, with average prices in Luxembourg and available financial aid via the Klimabonus Wunnen 2026.

Understanding the Differences Between PVC and Aluminum

PVC (polyvinyl chloride) is the most common material for windows, appreciated for its excellent value for money, ease of maintenance, and thermal performance. Modern PVC profiles often incorporate multiple chambers and metal reinforcements to improve rigidity and insulation. In contrast, aluminum is a light, highly resistant metal that allows for thinner profiles and larger dimensions, ideal for bay windows and contemporary architecture. However, aluminum is naturally conductive to heat, which is why quality aluminum frames use a thermal break to improve insulation.

To choose, consider:

• Thermal performance: Generally, PVC offers better basic insulation, but aluminum with a thermal break achieves comparable or even superior performance with triple glazing.
• Durability and maintenance: Aluminum is virtually unalterable, does not deform, and does not yellow, while PVC can discolor over time and is more sensitive to impacts.
• Aesthetics and design: Aluminum allows thinner profiles, letting in more light, and offers a wide range of colors and finishes (lacquered, anodized). PVC is available in white, but also in colors with wood-look finishes.
• Budget: PVC is generally 30-50% cheaper than aluminum, making it the most economical choice.

Prices of PVC Windows in Luxembourg in 2026

The price of a PVC window depends on several factors: dimensions, type of opening (fixed, tilt-and-turn, casement), number of sashes, quality of the profile (class A, B, or C), glazing (double or triple), and hardware. On average, in Luxembourg, for a standard 120x120 cm window, installation included, expect:

• PVC double glazing: 450 to 700 EUR
• PVC triple glazing: 550 to 900 EUR
• High-end PVC (custom, large dimensions): 900 to 1,400 EUR

These prices include supply and installation by a professional. They may vary by region and complexity of the job. For a complete replacement of all windows in a single-family house (about 10-15 windows), the total budget often ranges from 8,000 to 15,000 EUR.

Prices of Aluminum Windows in Luxembourg in 2026

Aluminum windows are more expensive but offer superior longevity and a more modern design. For a standard 120x120 cm window, installation included, average prices are:

• Aluminum double glazing: 700 to 1,000 EUR
• Aluminum triple glazing: 800 to 1,200 EUR
• High-end aluminum (large dimensions, special finishes): 1,200 to 1,800 EUR

For an entire house, expect between 12,000 and 25,000 EUR. The price difference with PVC can be significant, but it is justified by a longer lifespan (50 years or more) and excellent weather resistance, making it a profitable long-term investment.

Financial Aid in 2026: Klimabonus Wunnen and Reduced VAT

Since January 2026, the Klimabonus Wunnen has replaced the former PRIMe House program. Managed by Klima-Agence, it offers subsidies for energy renovation works, including window replacement. For frames, you can benefit from 70 EUR per m² of replaced glazing, provided the new windows meet thermal requirements (Uw ≤ 0.8 W/m²K for glazing, and the window's thermal transmittance coefficient must comply). It is essential to submit the application before starting work, via the Klima-Agence website or guichet.lu.

Additionally, the reduced VAT of 3% applies to renovation works in homes older than two years, representing a significant saving. For example, on a 10,000 EUR invoice, you save 1,700 EUR compared to the normal 17% VAT.

Here is a summary table of the aid:

Which Material to Choose for Your Project?

The choice between PVC and aluminum depends on your priorities. If your budget is limited and you seek an economical and efficient solution, PVC is an excellent choice. Current profiles offer remarkable thermal insulation, especially with triple glazing, and require little maintenance. It suits traditional houses and standard renovations perfectly.

On the other hand, if you have large bay windows, modern architecture, or desire maximum durability, aluminum is more suitable. It allows for lighter and thinner sashes, increasing brightness. Its higher cost can be amortized over the long term thanks to its longevity and weather resistance.

To help you, here is a comparison of key points:

• Thermal insulation: PVC (good, but depends on profile) vs Aluminum (excellent with thermal break)
• Acoustic insulation: PVC (good) vs Aluminum (good, but depends on glazing)
• Maintenance: PVC (simple, with a damp cloth) vs Aluminum (virtually no maintenance)
• Durability: PVC (20-30 years) vs Aluminum (40-50 years)
• Design: PVC (less slim) vs Aluminum (slim, modern)
• Price: PVC (cheaper) vs Aluminum (more expensive)

Key Steps for Your Window Replacement Project

To succeed, follow these steps:

1. Assess your needs: Measure your openings precisely, determine the desired opening type and glazing (double or triple) based on orientation and existing insulation.
2. Request multiple quotes: Contact at least three specialized artisans or companies in Luxembourg. Compare prices, but also the quality of profiles and the warranty offered.
3. Check the aid: Before signing, consult the Klima-Agence website or guichet.lu to know the exact conditions of Klimabonus and prepare your file.
4. Choose a certified professional: Ensure the company has the necessary certifications (e.g., for window installation) and can provide documents for the aid application.
5. Plan the installation: Installation must be done by a professional to guarantee airtightness and thermal performance. Verify that the contract includes removal of old windows and waste disposal.

A typical example: for a 120 m² house with 10 windows (total glazing area of about 15 m²), the total cost for PVC triple glazing is around 8,000 EUR, installation included. With the Klimabonus subsidy of 70 EUR/m², you recover 1,050 EUR, and with 3% VAT, you save about 1,200 EUR compared to normal VAT. The final cost is therefore about 5,750 EUR. For aluminum, the initial cost would be around 12,000 EUR, resulting in a final cost of about 9,500 EUR after aid.

Mistakes to Avoid When Choosing Your Frames

Here are common pitfalls:

• Choosing material solely on price: The cheapest is not always the most economical in the long run, especially if insulation is poor.
• Neglecting the solar factor: Glazing must have a solar factor adapted to orientation to avoid overheating in summer.
• Ignoring ventilation: Too airtight windows can lead to humidity problems; consider installing air inlets.
• Forgetting the aid: Many homeowners do not apply for Klimabonus in time. Inform yourself before starting work.

Conclusion

The choice between PVC and aluminum frames in Luxembourg depends on your budget, aesthetic preferences, and technical requirements. PVC remains the most affordable and efficient solution for most renovations, while aluminum is ideal for high-end projects and large glazed areas. Thanks to the Klimabonus Wunnen 2026 and reduced VAT, you can significantly reduce the cost of your project. Remember to compare quotes and check eligibility for aid.