Preventing cabover rot in the first place?

Seams, windows and clearance lights seem to be the major culprits. A close inspection/test of any suspected areas should be addressed with eternabond or Dicor. A pressure test would also provide you with peace of mind and also point to any other leaks.

Good point. A Sealtech (technically Sealtech Manufacturing USA) test is a place to start. Since this MH is new, might as well take precautions now, since fixing cabover damage is a very expensive proposition.

Rubber roof is common in all types of RV's .. that wouldn't be a high concern in my book.

ksg5000 wrote:
Rubber roof is common in all types of RV's .. that wouldn't be a high concern in my book.

I agree. Regular inspection and maintenance should avoid any leaks.

Not to hijack this post but I have had a leak around the solar panel and especially the overcab vent above the bed since getting the MH. I have tried to use silicone that is meant for roofing applications and got it to the point where it's about 80% better but the water is still coming in. Would I just be better off replacing the vent altogether?

I had a leak around the cabover vent, too. I stopped it by just putting more Dicor self levelling caulking on it. I didn't remove the old stuff. When I do that, I will put Eternabond on. Also, the seam along the front. I noticed that the water pooled in an area beside the vent. It seems the crossmember holding the roof and vent up is bent or broken, likely because I didn't know how flimsy the roofs are and worked up there without running planks side to side. To deal with that depression temporarily, I opened a joint in the ceiling below so I could get my arm in. I pushed in a piece of wood long enough to run over top of the cross pieces from one to another. It sits there without fastenings and eliminates the depression. Something worked - no leaks for a year now. I intend to one day open that ceiling and fix it properly, probably with a metal cross member screwed onto the damaged one.

Thanks for the reminder - I must Dicor the clearance lights again.

I have a 07 Lazy Daze and am in the process of using EternaBond tape on the seams. I have no evidence of water damage but the caulking on roof is showing its age. When I started looking a friend told me there are two kinds of RVs; those that are have leaks and those that are about to leak. I hope to keep mine in the second group.
http://dac.smugmug.com/Cars/Individual-cars/Lazy-Daze-improvements-gadgets/Sealing-the-LD/http://dac.smugmug.com/Cars/Individual-cars/Lazy-Daze-improvements-gadgets/Sealing-the-LD/

I ordered my Fleetwood 'C' from my dealer. When it came in, we did a thorough walk thru. As I was walking around, they pointed out that they had removed the marker lights, calked and re-sealed as part of their normal pre-delivery prep. They explained that the factory uses air powered drivers and often over-tightens the screws, causing cracks. No leaks in 10 years. I've seen what happens to the wood supporting the cab over if they aren't re-sealed.