The material not only affects the price, but also maintenance, appearance, stability, and service life. Here are the most important systems—with practical classification.
Plastic windows: budget-friendly and uncomplicated
PVC windows are the most economical solution for many renovations. They insulate well, are easy to maintain, and are resistant to weathering. Their limitations tend to become apparent with very large formats or when a particularly high-quality appearance is desired. For solid energy savings on a
manageable budget, plastic windows are usually the first choice.
Wooden windows: classic, cozy – but require maintenance
Wood has a warm appearance, fits perfectly with old buildings and high-quality renovations, and offers very good insulation values. However, depending on the weather side, surfaces must be checked regularly and repainted. If aesthetics, feel, and sustainability are important to you, wood is the best choice – as long as you consciously plan for maintenance.
Wood-aluminum: premium solution with a long service life
Wood-aluminum combines the cozy character of wood on the inside with a robust, weatherproof aluminum outer shell. This greatly reduces maintenance requirements and increases service life. In terms of price, this system is significantly more expensive than plastic, but it is very stable and often a "once and for all" decision in the long term.
Aluminum windows: modern , stable, ideal for large elements
Aluminum is extremely dimensionally stable and is particularly suitable for large window areas, lift-and-slide doors, or filigree frame designs. Modern aluminum systems are thermally separated and technically sophisticated—but they cost more. They are particularly useful for modern architecture and high stability or design requirements.
Plastic-aluminum: more stable than PVC, cheaper than wood-aluminum
This hybrid solution uses the advantages of plastic on the inside and an aluminum shell on the outside for weather and color design. This gives you a robust, low-maintenance window with good insulation performance – often with a very attractive combination of price, appearance, and durability.
Skylights: more technology, more installation work
Skylights are more exposed to the weather and must be perfectly sealed. Operation (pivot/tilt function), thermal insulation, heat protection, and connections to the roof determine price and service life. However, when well planned, skylights provide an enormous amount of daylight and significantly increase the usability of the attic space.