The roof on our Regency does not show any signs of leaks anywhere. It also doesn't look like it has been resealed at any time previously either.
The only problem is that it bleeds a light colored residue off the roof from the brow down on to the windshield after a rain or even a heavy dew. It looks unsightly and it's annoying to have to clean this whitish crud from the windshield all the time. There is enough of it that it even shows up as white streaks on the front of the coach down to the bumper. When dry it has a chalky appearance and does not wipe off without some water and soap or windshield washer fluid and a windshield brush.
Anyone else encounter this? What would be the best option to redo the whole roof with? What do people use to reseal around the various A/C and vent units.
Can you crawl around up there on that aluminum skin without causing harm?
Thanks for any advice. Looks like this is my next job.
Don

I too have this same condition - no leaks yet but that white stuff is streaking so it must be deteriorating. When I do my roof I plan on removing my AC units to replace the flange mounting gaskets.

I was out this summer and one day during a downpour I noticed a couple drips of water - after removing the inside cover and tightening up the 6 mounting bolts no more drips. Looks like I caught it in time, there was no other signs of leakage and it was still raining just as hard, if not harder.

I then went to the other AC unit and, for preventative purposes, tightened the bolts down too. All bolts seemed loose on both units, but not knowing what the proper torque is I just assume they were loose.

Anyone know what these older Coleman's weigh in at? Has anyone replaced the flange gaskets without replacing their AC units or is tightening these things up just part of the normal process?

IMHO if tightening the nuts stops the leak, by all means tighten.(within reason, of course) Its a massive pain in the posterior to pull the a/c off the roof, clean up the goop, set a new gasket, & reassemble the whole mess. Been there, done that on our daughter's 5th wheel last year.

I don't know what the a/c's weigh, but in my book they qualify as heavy. Even with son-in-law doing the heavy lifting it was difficult.

It ain't broke until tightening the nuts doesn't help any more, & you know what you're not supposed to do if it ain't broke.

I rolled on a coat of cool seal on our roof. It is bright white so it reflects and if there is a leak it will seal it. I just used a roller. it would also seal any chaulking.

IIRC, the Coleman units weigh about 95 lbs.