ᐅ Replace windows in a house built in 1967, or keep the old ones?

Hello dear forum members,

I have bought a house built in 1967.
Now I’m starting to renovate.
In 1995, new windows were installed.
These are double-glazed wooden windows. Should I replace them with new ones?
The window installer says yes.
What do you think about this?

BendFlad schrieb:
The window manufacturer says yes.

You notice, right?

1. Is the frame in good condition or fixable with a new coat of paint?
If yes, then:
2. Are the seals between sashes and frame present and intact, meaning no drafts?
If no, replace or install new seals afterward; otherwise...
3. 1995 is exactly the year when an infrared coating on the outer side of the inner windowpane was introduced. It is probably present. This reduces the glazing U-value from about 3.0 W/m²K to 1.5–1.0 W/m²K.
How to check: The lighter test–hold a lighter close to the inside surface of the windowpane. In the reflection, you should see four flames. The first two are from the inner pane; the other two are from the outer pane. The first two flames in the reflection should have different colors, the second one being slightly pinkish.

If that is the case—leave it as is. Otherwise, have the glass replaced (about €100/m² (approximately $100/ft²) including installation), ideally with triple glazing if possible or at least with a warm edge spacer.

BendFlad schrieb:
The window manufacturer says yes.

Makes sense. 23 years – any layperson would assume they wouldn’t pass the building inspection much longer ;-)

I fully agree with the previous poster. You can readjust the hinges, replace the seals, upgrade the locking pins, and change the glass panes (and two panes are not necessarily worse than three). So, if the frames are still in good condition, avoid the hassle of replacing them.

---

https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/

Check thoroughly, especially on the weather-exposed side, all areas where water can drip and run behind. The junction between the window and the window sill is a common problem spot where moisture tends to remain. It may still look fine visually, but you can press into it with your finger like a soft cake. (This is the current situation in the rental apartment we still live in; some windows have already been replaced because of this.)