PVC, aluminium or timber-aluminium windows: compare proposed systems
Published on 4 August 2026 · Verified on 18 September 2026 · The Mestravaux.lu team
Visible material does not describe the whole window. Compare profile sections, performance data and maintenance requirements for the actual models. This guide assigns no unsupported ranking for average price, lifespan or property resale value.
The essentials in 30 seconds
- Distinguish aluminium frames from aluminium cladding on another material.
- Compare equivalent configurations and documented data.
- Examine maintenance and repair options before ordering.
Identify what the material label means
An aluminium label can describe aluminium-clad PVC. Internorm distinguishes PVC, PVC-aluminium and timber-aluminium ranges. These describe its products, not every market offering. Request a section drawing to identify the proposed model’s construction.
| Critère | PVC | Aluminium | Mixte bois-alu |
|---|---|---|---|
| Prix fenêtre standard posée (triple vitrage) | 450 – 900 € | 700 – 1 400 € | 900 – 1 200 € |
| Coefficient Uw typique | 1,0 – 1,3 W/m²K | 1,0 – 1,2 W/m²K | 0,8 – 1,0 W/m²K |
| Entretien | Nettoyage seul | Nettoyage seul | Nettoyage seul (bois protégé) |
| Durée de vie estimée | 25 – 35 ans | 35 – 45 ans | 30 – 40 ans |
Fourchettes indicatives pour une fenêtre standard à deux vantaux, triple vitrage, pose comprise.
Compare performance without automatic rankings
Align dimensions, opening type, glazing and accessories for each opening. Record documented performance, its scope and conditions. Do not fill missing data with an assumed material average. If glazing or fitting also changes, request a variant that explains the difference.
Check appearance and feasibility
Request drawings showing visible glass area, mullions, threshold and actual opening. For large units, have permissible dimensions and sash weight confirmed for that system. Do not rule out a material using an invented universal width limit. Test handles and operation on a representative model.
Your project deserves an accurate estimate — it's free.
Request a quotePlan maintenance and repairs
Internorm’s maintenance guidance covers surfaces, hardware and seals: cladding does not mean maintenance-free. Request instructions for the proposed product, finishes needing attention and access to replaceable parts. Clarify warranty conditions and maintenance you must fund.
Choose using the project’s trade-offs
Compare complete fitting and finishing costs, interior and exterior appearance, ease of use and after-sales support. A preferred finish can justify a personal premium without promising higher resale value. When mixing materials, check samples, colours and façade drawings together before ordering.
Related guides to continue
- Double or triple glazing: compare variants for your homePane count alone cannot select a window. Request identified variants and compare performance and cost within the same project. No average premium or payback is claimed without verifiable offers.Read the guide
- Ug, Uf and Uw: read window thermal performanceA thermal value helps only when its scope is known. Glazing alone and a complete window are different objects. Request the symbol, unit, product and conditions behind each figure.Read the guide
- Window replacement budget: build a verifiable estimateWe have no dataset of dated, comparable quotes supporting a Luxembourg average. Start from actual openings and the required result. This method prepares pricing without turning assumptions into market prices.Read the guide
- Understand a window quote: product, work and exclusionsFirst check whether offers describe the same openings and finished result. This guide provides a comparison method, not average prices or a legal contract template.Read the guide
Frequently asked questions
Which material insulates best?
Compare actual window performance on an equivalent basis. A material label does not establish a product value.
Does timber-aluminium need no maintenance?
Check instructions for the interior finish, seals and hardware. Exterior cladding is not a maintenance-free guarantee.
What aluminium premium should I use?
Request comparable variants. We have no quote sample here establishing a Luxembourg price difference.
Does choosing a material secure a grant?
Have the project checked against scheme conditions. A commercial label does not prove eligibility.
Take action
Your project deserves an accurate estimate — it's free.
Request a quote