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Old 07-03-2022, 07:02 PM   #31
Shane826
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Yeah when I was trying to figure out how to revive mine vs rebuild it, we looked a at a bunch of ideas including the two arched pieces of metal. The problem was there isn’t anything rigid enough to force the metal to stay in an arch, we thought since the walls weren’t anchored at the bottom the arch would flatten and push through the walls.
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Old 07-04-2022, 03:22 AM   #32
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Yeah when I was trying to figure out how to revive mine vs rebuild it, we looked a at a bunch of ideas including the two arched pieces of metal. The problem was there isn’t anything rigid enough to force the metal to stay in an arch, we thought since the walls weren’t anchored at the bottom the arch would flatten and push through the walls.
I agree flat metal would not work as a fix.
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Old 07-04-2022, 03:26 AM   #33
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Shane, I honestly don't know. Other than these channels, the only think I can think of would be using two very stiff slightly curved flat bars, to sandwich the shell. It would cause you to drill thru the shell. Not something I am inclined to do. I'd rather have the shell replaced.
What's your concern of drilling through the shells? If sealing those holes is somehow an issue remember that all RV manufacturers cut big holes for the ac and skylights. TMs are not any different in this sense and perhaps cut even bigger holes through their roofs per square inch than any other RV manf. Remenber roofing material in homes are nailed trough and huge skylights are built sucessfully. If executed properly you can seal these fenestrations without issue. .
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Old 07-04-2022, 12:10 PM   #34
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My concern is because you open the structure to the elements; you compromise the original strength of a wall, floor or roof. My training was never to pierce the structure or shell if not required. I'm not saying I won't, but I will think two to three times before I do that, I also ask other experts just to make sure I'm not making a mistake. I try to see if there's another option. Not everyone preps or applies sealants correctly. Sealants/glues can and have failed, especially if applied incorrectly and for age.
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Old 07-04-2022, 12:27 PM   #35
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My concern is because you open the structure to the elements; you compromise the original strength of a wall, floor or roof. My training was never to pierce the structure or shell if not required. I'm not saying I won't, but I will think two to three times before I do that, I also ask other experts just to make sure I'm not making a mistake. I try to see if there's another option. Not everyone preps or applies sealants correctly. Sealants/glues can and have failed, especially if applied incorrectly and for age.
Trailmanors to my knowledge don't have any structure... they are unibody construction from my understanding. So drilling small holes should not do anything to the structural integrity of the shell. Remember TM cuts 2' x 3 ' holes for ac and skylights. They also drill holes for the batwing antenna and brick mould for skylights and corner bracket that holds the shels together. As for glues they have improved tremendously. With dicor and roof tape to butyltape its now possible and easy to seal off just about anything. But sure just like the skulylight openings are a maintenance item that needs attention every 5 years or so... so too any additional hole put in the roof. I just don't see what the issue is except a potential underdesigned structural problem that is built into every 2720 that eventually starts to sag. Not doing anything is worse than a few holes that need a dab of new dicor every five years IMHO
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Old 07-04-2022, 03:20 PM   #36
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All the panels do have a frame around the perimeter. There are not floor joists, wall studs, or roof beams though.

I do wonder though if the extra few pounds would be worth it to add a support beam or two into the roof sections.
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Old 07-04-2022, 03:41 PM   #37
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All the panels do have a frame around the perimeter. There are not floor joists, wall studs, or roof beams though.

I do wonder though if the extra few pounds would be worth it to add a support beam or two into the roof sections.
Talking to TM factory they advise the "frame" on the perimeter is to serve as a nailer for things like the seam pillow and therefor are non-structural.

As for what's "worth it or not" depends on if you want to watch a sag creep into concave territory and have no choice but to get the shells replaced or try and stabilize the sag and prevent an all out super expensive, time consuming replacement. For me at least trying to add some strength to a roof that's been weakened by huge holes of heavy AC is well worth the couple of hundred dollars that if executed properly can give you a few more years of use. Everyone is differant with different skill sets and abilities. It would have been nice to have a TM kit to do this but there is not.

So unfortunately one is relegated to one of two options. DIY or factory replacement of both shells. Nothing wrong with the later if that is what is chosen but it's clear that you'd better be ready for a heafty cost on replacement vs. Stabilizing some sag.

BTW, there is a huge diff. Between "stabilizing" a sag and one that is too far gone that needs lifting from a concave position. My hunch is that if your sag is flat line or still to some degree convex there is a possibility to 'stabilize'. I should know more which way o decide to go in the weeks and months ahead. Either way I know whatever I do can only make things better not worse. I would bet that folks looking at my TM would say it's not that bad. And true it's not but there is a noticeable slight sag not unlike pics another member posted here. But I know doing nothing I will be dealing with far greater forces and sag as time goes on and much greater chance of needing a full replacement sooner rather than later. To each his own as they say or when you go to sleep you get nice dreams befor reality hits you when you wake up.
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Old 07-04-2022, 06:03 PM   #38
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I assure you there is more perimeter framing than just the rear edge where the bag seal attaches.

Regardless, I’m gonna now out here.
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Old 07-04-2022, 06:41 PM   #39
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I assure you there is more perimeter framing than just the rear edge where the bag seal attaches.

Regardless, I’m gonna now out here.
Where are you getting this information from? I am just wondering? Did you come across a cross section detail or a video or picture someplace? I haven't seen a thing that correlates what you say.
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Old 07-04-2022, 11:02 PM   #40
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I’ve seen the panels being made. All the panels have a frame around the perimeter. When I gut my 2619 for parts I’ll rip the roof off so you can see.
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