Frequently asked questions when choosing PVC windows

How to choose PVC windows: main criteria

Choosing PVC (uPVC) windows affects comfort, energy bills and security. This guide highlights the key factors to help you choose the right windows and avoid common mistakes.

1. Profile and class

• The profile is the window's frame. Pay attention to the number of chambers (3–7), steel reinforcement and wall thickness.
• Profile classes (A, B, C) indicate strength and insulation. Class A is typically recommended for residential use.

2. Glass units (double/triple glazing)

• Single, double and triple glazed units differ in thermal and sound insulation.
• Fillings (air, argon) and Low‑E coatings reduce heat loss.

3. Energy efficiency and U‑values

• Look for the U‑value (thermal transmittance) — lower is better.
• Warm edge spacers, quality seals and the right glazing combination reduce heat transfer.

4. Hardware and security

• Quality hardware ensures sealing and lasting operation.
• Security options: tilt-and-turn locks, anti‑slam devices, additional locking points.

5. Installation and warranty

• Professional installation matters as much as product quality: poor installation negates benefits.
• Clarify warranty terms for profile, glazing and installation work.

6. Design and extras

• Frame color, foil finishes, integrated blinds, sills and drip edges affect appearance and cost.
• Mosquito nets, roller blinds and shutters can be ordered as integrated solutions.

Practical buying tips

• Compare full specifications, not just price. Low cost often hides compromises in glazing or installation.
• Request profile samples and certificates.
• Measure openings right before installation — dimensions can vary.
• Clarify delivery terms and removal of old frames.

Modern PVC windows are a system: profile + glazing + hardware + installation. Cutting corners in any component reduces performance.

FAQ — common questions

Q: Which is better: 3‑chamber or 5‑chamber profile?

A: It depends on climate and budget. For many apartments, a 3‑chamber profile with a double‑glazed unit is sufficient. For colder climates, a 5‑chamber profile offers improved insulation.

Q: Do I need sound‑insulating glazing?

A: Yes, if your windows face a busy street. Different glass thicknesses and wider cavities improve sound reduction.

Q: What matters more — profile or glazing?

A: Both matter. The profile provides structural strength and base insulation; the glazing determines thermal and acoustic performance. Aim for a balanced solution.

Q: What is the service life of PVC windows?

A: With proper use and professional installation, windows can last 25–40 years. Longevity depends on conditions and maintenance.

Q: Should I ventilate rooms with modern windows?

A: Absolutely. Use micro‑ventilation options and regular short airing to control moisture and indoor air quality.

Q: How to care for windows?

A: Clean seals gently, lubricate hardware annually with recommended grease, and clean glass with soft, non‑abrasive products.

Quality check on delivery and installation

• Verify dimensions match the contract, test all opening modes, and inspect seal tightness.
• Check for chips or cracks in glazing before signing acceptance.
• Request product passports and handover documents.

Conclusion

Choosing PVC windows is a combined decision of technical specs and correct installation. Consider your climate, noise level and budget, compare full offers and choose experienced installers for a durable result.