Condensation Problem
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Fleet Mechanic
Joined: Feb 2004
Posts: 1,509
Likes: 333
From: Arlington,Wa
Condensation Problem
Any ideas on how to slow it down?? Seems I live in a cool damp locale. Had an idea to glue the headliner to a sheet of ABS plastic to catch the moisture and then it would drain off and not get the cardboard/paper headliner wet. Had to do something since I noticed some mold starting to grow. Can't have that. And while I have the headliner out, I'm going to make sure my cab lights aren't leaking. I know there is another thread on this issue......didn't want to hijack.
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 83
From: NorCal
I see you posted in the headliner/material thread but lemme quote myself..
So, if ya replace the headliner with ABS but do not address the condensation issue, then you're just setting yourself up for roof rail rot.
Insulate, insulate, insulate....
Originally Posted by HIO Silver
The reason headliners warp is due to condensation that forms on the uninsulated interior surface of the roof. I have observed the phenomenon when my rig was parked on the north side of my house. The condensation, in turn, either drips straight down on the headliner or collects and runs down to the inside roof rails thus causing the dreaded roof rail rot. It typically doesn't rust from the outside due to bad caulking along the rain gutter... Rather, it rusts from the inside out.
Insulate, insulate, insulate....
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