When should window gaskets be replaced?
If they are well looked after, window gaskets will last for between 10 and 15 years. But as soon as they no longer perform their task – in other words, start to leak – it makes sense to replace the gaskets. Their effect is reduced automatically over time, through frequently opening and closing the window and also because of weathering and UV radiation. At the latest, when you notice that you are no longer able to heat one or more rooms properly, it’s time to replace the gaskets
But you can also carry out a few tests beforehand so that things don’t get so bad. Occasionally, deformations can be seen on the gaskets themselves – even with the naked eye. A flickering candle on the window sill is an indication of ineffective protection. Draughts can enter the room even when the window is closed. On the other hand, if you are able to slide a piece of paper between the sash and the frame easily, this is a sign that the contact pressure is too weak. This means that draughts will get into the living areas and the heat can get out. Here, too, it’s time to replace the gaskets.