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bbells's avatar
bbells
Explorer
Feb 23, 2018

How hard to replace siding on 2 year old trailer?

2015 Heartland North Trail. Even though a couple years ago I resealed all the windows and every possible place water can get in, one side of my trailer's siding is delaminating just about everywhere. There is no sign of water damage - I checked when I took the windows out, etc. IMHO, the delamination was caused by my areas very warm days in the sunshine and extremely cold nights. The bubbles only expand in the winter. The problem side gets direct sunlight in the morning, shade in the afternoon and evening.

2 questions:
1) How hard is it to remove all the fiberglass or filon? siding and replace it? I imagine a lot of the plywood underneath would come off and need to be replaced, too.
2) Has anyone just covered delaminated filon or fiberglass with screwed on aluminum trailer siding? It seems pretty easy to work with and could be a quick and efficient fix. Do an shops do this?

Even though it is only a couple years old, it seems to me the $10,000 dealers want to replace the filon or fiberglass on one side is more than I am willing to put into the trailer. Plus, even if I did I am sure the other side that currently has no delamination would start separating soon. Any constructive comments will be appreciated. Thanks!
  • Almost sounds like a bad glue job. Sucks. Biggest concern for any fiberglass sided RV owner. OT a little but thats one thing that makes Cedar Creeks intriguing. The walls are hung on the aluminum stud using Sikaflex.
  • Thanks guys! Unfortunate, but about what I expected to hear.
  • westend wrote:
    It is a monumental job to replace a filon exterior wall.


    For an owner trying to do a DIY, yes - but my own dealer has done several and I've seen one of these repairs myself, up close & personal. Repair involves removing the entire sidewall from the trailer and installing a new replacement ... pretty impressive on a 30' trailer BUT not so daunting for techs who know what they're doing. ;) That said, no way I'd pay for a repair like this and would only have it done if it was covered under warranty ... otherwise just use the trailer and try to not let the delamination bother you. ;)
  • It is a monumental job to replace a filon exterior wall. The filon is glued to a substrate, the substrate to the frame. The process leaves an adhesive bond that is very strong.
    If you only have delamination in a few areas, a repair is possible but may not be a permanent cure. The repair process involves insertion of an epoxy underneath the exterior filon and bracing until the adhesive cures. Some have had good luck with this repair process.
    If you have delamination, I would suggest to check for leaks using the "pressurized interior" test. Seal Tech is one commercial company that does the test or you can do it yourself with a blower. The pressure test turns up even pinhole leaks.
    Good luck with the repair!
  • Thank you goducks10. My sentiments exactly. I don't think there is anything for aluminum siding to grip, so I am sure that is out. I wish I could find some water damage so I know what the deal is, but I can't find any.
  • The filon is glued to a 1/8" piece of Luan plywood. That is then glued to the wall structure which consists of aluminum studs and Styrofoam. The whole wall structure is then run through a vacuum seal or pinched rolled.
    It's a daunting task for the home owner. I doubt it's even doable by 95% of the dealers in the country. Most times the unit is sent back to the MFG.
    My thoughts are is live with it or possibly see if your ins company can help.
    Best case scenario is wait until the next hurricane season arrives, tow it there and leave it.