Howdy The Newsoms, I'm no expert on this, but it is my understanding the rear wall is constructed of the aluminum framing, insulated, (not bonded), electrical wiring installed, and then the "rear fiberglass cap" is installed to cover this area, but is not bonded to the rear wall. I think you should get a "hollow" sound if tapping on this. The front cap should be similar, but maybe someone from Forest River could weigh-in on this question and explain in more detail.
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2012 Cardinal 3675RT
2014 Ford F350 CC LB FX4 6.7LPSD 3:55 E-Locker
Bellville, Texas
Austin County "Colonial Capital of Texas"
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