Lead pipe boot leaking at radon pipe – Leak in attic
The weather has been pretty brutal here in Chicago for the last couple of weeks, with record snowfall and record cold temperatures.
I thought I had an issue with my main plumbing waste vent (a question for another day), but when I went into the attic today, it turned out there was a leak around the penetration in the OSB roof sheathing for the radon pipe. The OSB is pretty soaked, about 6-8″ away from the penetration, following the pitch of the roof.
About a foot of snow has been sitting on the roof for the last 3 weeks, but once temperatures rose into the 40’s yesterday and today, it’s all since melted.
I’m assuming I just have the roofing company come back, hopefully tomorrow, and replace the lead boot?
I removed all the wet cellulose in the area (one black garbage bag), and I’ve left the area open to dry down to the wet 2×4 (in the picture) and the Intello directly below that (our ceiling air barrier). I’m assuming this is ok to do since temperatures will remain in the 40’s until tomorrow night.
But I’m also assuming I need to get new cellulose put back before the temperatures fall again. Is this ok to do even though I’m sure that 2×4 will still be partially wet tomorrow?
I checked the trusses in the area under the cellulose, and they’re all dry, so it looks like the leak is pretty recent and contained. Maybe the combination of snow on the roof with record low temperatures was enough to allow water, once the snow started to melt, to find a path around the lead boot and into the attic?
Once the lead boot is replaced, does it make sense to apply a product like Prosoco’s Joint and Seam (vapor open) around the penetration in the OSB and the radon pipe from the attic side?
My thought was, if water finds its way to this area again it would have to migrate through the OSB where it could dry to the attic side of the roof — we have a ventilated roof so a lot of air is running up the roof sheathing to the ridge vent. Bad idea? I thought this might be better than my current situation where water was falling directly onto the cellulose.
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