Unfortunately the rain we're getting isn't heavy enough to trigger the problem (yet, anyway) but while I was up there looking around I decided that I really had to get over my trepidation at climbing deeper into the attic so I could reach the laundry ceiling area.
I took a broom with me to clear away the insulation so that I could see the other side of the laundry ceiling. I've attached some more pictures. The first is the oven vent from the outside. The second is the oven vent from the inside. Note the black stains along the beam above the red arrow and the strip of yellow sealant. The third is a closer view of that area and shows that the yellow sealant gets very thin right near the beam where the stains are. Finally, the fourth shows the attic side of the laundry ceiling and what looks like water stains centered around the seam in the ceiling drywall.
I suspect the thinness of the yellow sealant at the beam is probably responsible for the leak.
Comments?
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bc
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