I have a chimney on my roof that seems to be allowing rain water in. These are flat roofed row houses. This is my neighbors chimney and part of to the party wall. My roof is 3 year old rubber roof. I don’t believe it’s the cause of the problem. The only thing left is the chimney. When it rains a lot, as it’s been doing here in Boston for the last week, water manages to seep in thru the brick chimney into the party wall and stain my ceiling next to the party wall. Is there some kind if coating that I can plaster or paint on this chimney to seal it. It doesn’t matter what it looks like since no one will see it. Most of it’s flues have been blocked off but there is still one flue attached to a rarely used fireplace. So what ever I use cannot be flammable.
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