The coroplast underbelly isn't supporting anything but it does provide a minimal amount of insulation and protection for wiring, holding tanks, and plumbing lines. Don't be fooled into thinking that it provides much in the way of insulation during cold temperatures. There are just too many holes and openings and too much empty air space inside the coroplast for it to do much in the way of stopping your pipes from freezing.
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2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax
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