Why does air leakage happen?
Air leakage in PVC windows is usually caused by worn seals, poor sash adjustment, loose hinges or a locking mechanism that no longer applies enough pressure.
If the issue is not solved early, heat loss increases, sound insulation weakens and the window sash may deform over time.
When should you call service?
If curtains move while the window is closed, cold air comes from the edges or the handle turns with difficulty, professional inspection is recommended.
The correct solution starts with window adjustment, followed by seal and mechanism checks.
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