Roof leaks.

Quite a bit has been written on this subject and I don't have much to add regarding seam leaks, leaks around window frames, door frames, etc. However, there is one rather obscure place where an annoying and difficult to find leak may occur that has not, as yet, been mentioned so far as I am aware. Herewith, it is mentioned:

On SS's made in the dark ages when mine was made, the holding tank vent line exits thru the roof and is "dolled up" by adding an aluminum "chimney" that's intended to obscure the fact that a yukky looking piece of PVC pipe is in there. Seems to me (I'm not going to the barn and check this) that these chimneys are secured to the skin with six sheet metal screws.

There is a fairly thick rubberish gasket between the chimney and the skin. You will find that this thing is probably cracked around the screw holes and will need repair. With respect to those who object to silicon compounds on aluminum skins, that's what I use to repair this type of thing. Always have, always will.

However, that's not the problem. The problem is the seal between the PVC and the skin that's located INSIDE the chimney.

On my SS, this seal split next to the PVC and allowed some of the rain that hit the chimney, but not the PVC, to enter the outer skin of the SS.

In my case, this water (an astonishing amount of water, given time) made its way by some means that defy imagining to a place quite remote from the vent pipe where it then entered the interior. I hunted for the ingress point for this water for years without success and finally found it by accident. (When I removed the chimney to polish it.)

If you have a leak that you havn't been able to locate, give the chimneys (I have two, actually) a hard look. Don't be misled by the fact that the water might be showing up some distance from the things--funny stuff happens.

Clark
WA7GGV
27' '70