Marshall62
New Member
We have heavily used shower in an upstairs bathroom (with exhaust fan) that drains into a pipe that runs up/down an outside wall into the attic where it then turns and runs horizontally in toward the center of the building where it joins a larger diameter stack pipe. Its very cold in our attic right now (10 degrees outside) I've felt around the this joint after taking a short shower to see if I can feel moisture and it seems to be dry. But in the adjoining room the ceiling below this joint has a dark circular stain that has grown worse over the years.
I see the remains of a wasps nest around the stack just as it exits the roof which might mean they have a nearby entrance around the pipe.
Seems to be two possible sources of this leak: either condensation at this joint from excessive showers or incoming rain/snow through the stack.
Can you suggest ways to verify which one it is and what to do to remediate?
I see the remains of a wasps nest around the stack just as it exits the roof which might mean they have a nearby entrance around the pipe.
Seems to be two possible sources of this leak: either condensation at this joint from excessive showers or incoming rain/snow through the stack.
Can you suggest ways to verify which one it is and what to do to remediate?