Hello everyone,
I have the following problem: the glass surface of one of the windows on our house is clearly damaged on the outside. There are streaks running across the entire glass surface, similar to limescale stains. These streaks cannot be removed by normal cleaning. I have also tried using solvent. My parents had this window pane replaced many years ago because it was too badly damaged.
Interestingly, this phenomenon only occurs on one single window, which is located on the weather-exposed side on the ground floor. This is the only window in that position. Otherwise, there are only two windows on the weather-exposed side on the upper floor.
My suspicion is that the damaging substance is coming from the masonry (brickwork) and then running over the window. Something is also wrong with the brickwork, because over time the mortar joints on the weather-exposed side deteriorate and fall out. The house was built in 1980.
Does anyone have an idea what could cause this surface damage?
I have the following problem: the glass surface of one of the windows on our house is clearly damaged on the outside. There are streaks running across the entire glass surface, similar to limescale stains. These streaks cannot be removed by normal cleaning. I have also tried using solvent. My parents had this window pane replaced many years ago because it was too badly damaged.
Interestingly, this phenomenon only occurs on one single window, which is located on the weather-exposed side on the ground floor. This is the only window in that position. Otherwise, there are only two windows on the weather-exposed side on the upper floor.
My suspicion is that the damaging substance is coming from the masonry (brickwork) and then running over the window. Something is also wrong with the brickwork, because over time the mortar joints on the weather-exposed side deteriorate and fall out. The house was built in 1980.
Does anyone have an idea what could cause this surface damage?
Of course, the streaks could also be on the inside, but two points make this rather unlikely for me:
1) The pane has already been replaced once. It would be quite a coincidence if this happened twice on the same window.
2) When I look almost horizontally across the pane, I can still see the marks.
As I mentioned above, this window position is unique. The other windows are mostly protected by roof overhangs or face the side sheltered from the weather.
At the moment, I have the advantage that the entire window was just replaced. So I still have the old window for testing in case this effect occurs again in a few years. However, it appears to be a form of etching.
If you want to fix it yourself, there are probably only these two options:
Glass polish: for small, fine glass damage
Grinding and polishing: for more significant glass damage
I will apply a glass sealant to the new pane, hoping that this helps or delays the effect. After all, there will be a new window in 30 years anyway! ;-)
1) The pane has already been replaced once. It would be quite a coincidence if this happened twice on the same window.
2) When I look almost horizontally across the pane, I can still see the marks.
As I mentioned above, this window position is unique. The other windows are mostly protected by roof overhangs or face the side sheltered from the weather.
At the moment, I have the advantage that the entire window was just replaced. So I still have the old window for testing in case this effect occurs again in a few years. However, it appears to be a form of etching.
If you want to fix it yourself, there are probably only these two options:
Glass polish: for small, fine glass damage
Grinding and polishing: for more significant glass damage
I will apply a glass sealant to the new pane, hoping that this helps or delays the effect. After all, there will be a new window in 30 years anyway! ;-)
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