COUGAR, POLAR PACKAGE -COROPLAST UNDER BELLY
We have a 2014 Keystone, Cougar 327 RES equipped with the Polar Package and totally love it but we do have one concern. The under belly is covered with what I believe is COROPLAST (corrugated plas...
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My Outback has the same covering on the under belly. I've noticed the seems are not sealed tight at all. There are screws everywhere, including the middle of each sheet, indicating they are screwed into something. I've noticed a bit of sag, but probably not as much as you are describing.
My guess would be, at one time or another, you've had water get through those cracks when traveling in the rain. The water absorbs into the insulation under there, and that increases the weight. Being enclosed, the water can't evaporate very easy. Next rain, it does the same thing, adding more weight, and then over time, the Coroplast begins to sag, due to the weight now.
If yours is attached by screws, see if you can remove one panel that sagging and check it out for wetness. If it's dry, then it's sagging, simply because of age. Add a few more screws, or switch it to another underbelly material.
If it's wet, then with one panel off, you can force air under there and dry all the insulation out. This will take time, but it can be done. Then when dry, replace the panel and take some time to run some caulking along each seam. You'll run through a lot of caulking tubes, but this is about the only way to stop water intrusion from underneath.
Because it's plastic, I'd probably try Liquid Nails for Projects. This variation of Liquid Nails is maid to use on Styrofoam and won't melt Styrofoam or plastic. Original Liquid Nails will melt some plastics.
My guess would be, at one time or another, you've had water get through those cracks when traveling in the rain. The water absorbs into the insulation under there, and that increases the weight. Being enclosed, the water can't evaporate very easy. Next rain, it does the same thing, adding more weight, and then over time, the Coroplast begins to sag, due to the weight now.
If yours is attached by screws, see if you can remove one panel that sagging and check it out for wetness. If it's dry, then it's sagging, simply because of age. Add a few more screws, or switch it to another underbelly material.
If it's wet, then with one panel off, you can force air under there and dry all the insulation out. This will take time, but it can be done. Then when dry, replace the panel and take some time to run some caulking along each seam. You'll run through a lot of caulking tubes, but this is about the only way to stop water intrusion from underneath.
Because it's plastic, I'd probably try Liquid Nails for Projects. This variation of Liquid Nails is maid to use on Styrofoam and won't melt Styrofoam or plastic. Original Liquid Nails will melt some plastics.
