Baffled by roof leak!

i have heard of people pressurizing the interior with a big fan then spraying soapy water around points of entry.

Maybe not the roof at all...check the high up amber clearance lights..

Wijames wrote:
On my 1993 Chateau I have a roof leak that I just cant find. Myself and a friend got down on our hands and knees and searched every inch of the roof and cant find the leak. I checked all of the regular places like the seams and edges and all of the areas around the vents in the area. Yesterday I gave in and put a new coat of roof sealer on the entire top and went back this morning and applied a second coat. I'm hoping it's fixed but I sure would like to know where the leak is is coming from. Any ideas of where else I might have overlooked?

Did you remove A/C and do under it also?

The apply a positive pressure has merit with one addition soapy water, bubbles are easy to find!

I have actually seen water run underneath the roof coating product and exit in odd places. I never use the stuff for this reason. Check clearance lights

It cost about $100 to have your rig pressure tested which should locate all potential sources of leaks ..... suggest you make a few calls to your local RV outfits to determine what's available in your area.

Check the rubber boot on the antenna cable and seal it up.

Got a skylight?

Suspect areas:
Top lights, any molding strips on the front edge, along the gutter edge, window
gaskets and everything you gave already said.

Awning attachment points. I bought my rig used looking to add sweat equity and make it my own. Had a wallpaper peel in the bathroom near the ceiling so when I got it home I caulked roofline and normal entry points. Next rainy time I checked the wall and leak still there. Started sleuthing around and finally figured out my rear awning bottom bracket was allowing water infiltration that was wicking UP from the bottom. Sealed it and caulked the heck out of it. ANY break in the skin or seam can allow water in and water does some wierd stuff, and goes where it wants.