Robert, I can only speak from my own experience, and know you say the roof was inspected and “sealed”. But I thought our roof was intact until we left the coach with a Junction City tire installer while we visited relatives in Springfield. A gully washer went through the region in the interim, and that evening when we returned to the coach we found the galley floor enundated. Water was pouring in from ceiling lights and air vents.
I got on the roof in the rain and it was the first time I noticed an almost imperceptible dip in the fiberglass, a virtual lake, next to the solar panel. Nearby was where the solar wires penetrated the roof, and it was under water in the dip. It looked fully sealed, but flashlight in hand on my knees I gingerly managed to peel back the white elastic seal. Underneath it was sure enough a small tear in the sealant, through which water found its way inside, and in much larger quantities than you’d believe such a small gap would permit.
The dealer had left the rig on an adjoining lot that was level. Even a little off level would’ve allowed drainage away from the wire entry portal, and the super heavy storm only aggravated things. I used an old tube of sealant I had on hand to plug the hole, and topped it thoroughly with Lexel; it is workable even in wet conditions. The rain slowed but didn’t quit, but my patch worked. It took us most of the night to dry things out, and I removed ceiling fixtures, leaving ports open for months afterward to help drying of inaccessible ceiling spaces.
So my thoughts in your circumstance go to rechecking roof sealants. They may look great but looks can be deceiving, especially where sealant spreads underneath wires at a roof penetration point. Lift such wires to the extent possible and look closely for rubbery tears.
Joel
