This morning I started hacking off old tiles in order to re-tile. But at the lower left side of the window the plaster is definitely moist. I suspected this to be honest as tiles were a bit wobbly in that area, but it still is an unpleasant thing to find. I am anxious to find and correct the cause so that I don't re-tile over a problem that will then reoccur in due time. How do I trouble shoot a problem like this?
Most of the plaster in the affected area easily peels off due to the moisture. But I also need to understand how deeply into the wall this problem has gone. Do I need to worry about moisture having gone into the concrete in the external wall and if so how do I deal with that?
I am 90% sure that the cause is moisture building up on the wooden windowsill then being somehow wicked into the wall trough the wood itself. (Mind you the wood itself looks quite OK?) I am prepared to remove all wooden components of the windowsill and remake it with concrete and tiles, but must admit I am out of my depth here. And could there be other sources of moisture? There are no pipes in or near this section of the wall.
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Most of the plaster in the affected area easily peels off due to the moisture. But I also need to understand how deeply into the wall this problem has gone. Do I need to worry about moisture having gone into the concrete in the external wall and if so how do I deal with that?
I am 90% sure that the cause is moisture building up on the wooden windowsill then being somehow wicked into the wall trough the wood itself. (Mind you the wood itself looks quite OK?) I am prepared to remove all wooden components of the windowsill and remake it with concrete and tiles, but must admit I am out of my depth here. And could there be other sources of moisture? There are no pipes in or near this section of the wall.
View media item 44693