COUGAR, POLAR PACKAGE -COROPLAST UNDER BELLY

GPG52! wrote:
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 plastic sheets).
On two occasions last year we had to travel for several hundred miles during heavy rain.Once stopped at our destination we noticed an alarming large amount of water coming down from behind the coroplast. On closer inspection we also noticed the coroplast was sagging in some places.
Has anyone experienced similar problems?
Anyone find a fix to prevent water from entering behind the coroplast?
Any fix for the sagging coroplast?
I have asked our dealer to look into the problem and suggested that pieces of light angle iron be placed at intervals along the under belly to support the sags.
Any insight would be helpfull.
GPG

Put fender washers on the screws when you reinstall the coroplast to prevent breakthrough.

Here is a thread regarding replacing fiberglass with polystyrene:

http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/25743045