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CT_Camping_Al's avatar
CT_Camping_Al
Explorer
Sep 08, 2017

Replacing the Corplast underbelly on travel trailer

Hello. This is my first post! I am replacing the thermal underbelly material (corplast) on my TT. Has anyone replaced it on theirs? The concern I have is that the old material sagged and we got ...
SCClockDr's avatar
SCClockDr
Explorer
Sep 08, 2017
I used 2 by fir ripped down to match the existing frame width. I insulated with Lowe's foam board and R-Max & cut to fit smaller pieces to wedge into the frame perimeter. It seems to maintain a 6 to 10°F differential most cold nights with no heat running.

Plumbing tape was used to spread the load by the manufacturer, I reused it.

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