I had a Fourwinds C that was 1 1/2 years old and leaked all over. First was over the cab, I took all the lights off and sealed the wire holes, sealed around the screws before putting them back in, replaced 2 cracked lenses. I sealed around the front window, took the driver side window inside trim off and could see thru to outside!!! Removed the window and put new butel sealer around it and reinstalled. There was a leak around my antenna mount, fixed it, then around my skylight, fixed it. I also took the plastic trim out of my roof to sidewall channels and backed all the screws out and sealed them. I was so aggravated after owning this for only 6 months. On our last outing the DW never told me until a week later, she found another leak. It was traded later that month. Before we bought it, I was on the roof with the tech while he was resealing all the roof fixtures and seams, I felt sure it would be OK. The rig sat just a little down hill in my drive and the water was running inside the structure, forward. Good luck and don't discount any seam or roof fixture.
