Since the roof was replaced it seems the old iron drain pipe in the second
floor bath bangs once in the morning. I tried snaking the pipe, which seems
to help about a day or two. Is this a clog or is it something worse. I
don't like the idea of movement. What are you thoughts, experience?
I am guessing it is an expansion issue as it warms up in the morning.
Since you have related it to a new roof, my guess is it is a clamp or some
sort of hanger issue at the roof or in the attic area. I doubt if it is
anything inside the pipe.
Once you find the problem, adding some sort of shim or tightening or
loosening a clamp will likely take care of it.
I did a lot of sealing with the house work. I know I spray foamed the pipe
in the attic. Other than that and the new flashing I can't think of
anything else. I guess I can remove the hard foam and use that softer foam
that doesn't expand that much. Thanks Joe and m for your ideas.
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