"westysplace" <"I also have a "breatheable" ADCO TT cover. I have not used this before, but planned to cover the TT to protect from possible moisture infiltration during the winter. However, I have noticed that in our storage facility there are very few trailers sitting in the open which are covered, even though winter is approaching. We get 50 mph sustained winds up here in Washington either from the W or WSW and the NE when there is a cold "Frasier" out of Canada. We also have the possibility of snow which may last a few days. As further comment to this post, I have the following questions and comments for this forum.">
We also get some good wind here in Idaho, but may be more protected in our neighborhood. Our TT sits in our driveway. But we do get some good 30-40mph winds here that bend the trees! Our cover has always held well. Snow is also and issue, both for 'matting down' the cover and for melt/refreeze situations, so I have always removed major (6"+) snow from the TT with a broom or rake. I do make the cover snug, but not tight, allowing it to move but not 'billow' in the wind.
I think the reason you don't see many covers is that most folks just don't bother to cover their TTs, no matter where they are.
"westysplace"<*I have the TT sloped to one corner to drain off rain, but do you have to worry about this cover pooling water especially if melting snow is piled up against the AC and vents? I think this might be a problem even if the top was initially pulled tight.>
I have always sloped to one side and forward or backward to aid runoff potential, and that worked well. My previous TT, a Trailmanor, had a lot of humps and bumps on the roof that really created the problems you note around the AC, vents, Winegard, etc., so you are right about that. I ended up making a PVC domed frame that set on the roof over all the above that allowed me to just pull snow off, and any rain ( we get a lot in winter too) just ran right off. Puddlingis a problem especially if you get rain then freezing temps, then snow! This year a I guess I'll see what I need to do!
"westysplace"<*With heavy wind, will the vents and other roof projections tend to tear through the cover? One thought would be to cover these with plastic storage crates and drape the cover over the top of the crates. This may also help shed the water.>
I never had any issues with the vents or AC cover creating wear spots/holes in the cover. As long as edges are smooth and reasonably 'rounded', the cover holds up well, unless you have it very snug against that spot. The crate idea is one I tried (though with a kind of plasticized cardboard box) that just aggravated the problem by making the vent and Winegard projections higher, so had MORE bumps! Other projections, such as the rather 'pointy' downspout projections at roof edges, would need to be covered with something blunt, perhaps some old memory foam or similar?
"westysplace"<*Some have said that if the TT is not provided with or has a ladder as an option, that one should be very careful walking on the roof. I conducted the roof inspection from the TT edges using a good sized ladder. We didn't have any 1/4" plywood panel to lay on top, but I would guess this would be in order.>
I've always had aluminum roofs, but the Trailmanor did not support a lot of pinpoint weight, so needed plywood to support walking. I talked with our dealer service techs a lot about the roof because I was nervous about the rubber. They said not to worry about walking on it, just with clean shoes and no twisting, scuffing or dragging. I'm ultra careful walking on my house roof so as to protect the asphalt shingles, so figure I'll treat this rubber roof the same, only be more sure I don't have any 'edgy' sharp objects in my shoes! I think adding plywood might add some sharp, edgy material between your weight and the rubber and might not be good!
Good luck, hope my rambling helps!