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[GMCnet] preventing new headliner sag [message #155991] Sun, 08 January 2012 18:33 Go to previous message
KB is currently offline  KB   United States
Messages: 1262
Registered: September 2009
Karma:
Senior Member
I redid the headliner recently on our 26' coach with some 1/4" thick
beadboard plywood. This was to replace a thin formica material the PO
paid Grandview to install about 10 years ago that was sagging and curling badly.
The beadboard ply is an improvement, but I'm not thrilled with it.

I'm thinking of trying again with headliner material as others here have done.
Saw it in someone's coach and was impressed with the sound deadening quality.
I think the matte texture will also tend to hide flaws better. A photo site
search of "headliner" yields some great ideas and pictures.

This seems to be the stuff:
http://www.perfectfit.com/15593/154092/Marine-Carpet-and-Hulliner/Hulliner-and-Headliner-72.html

My questions to folks who've used this, typically on 1/8" thick plywood or other thin substrate:
1) did the thin plywood tend to sag over time in between the supports?
If not, did you glue/screw the plywood to the ceiling ribs?
I'd like to keep the ceiling removable for the inevitable repairs/additions,
but also don't want sags. Smaller sections are easier to support, but
how small does it have to be to stay flat? Any tips/tricks to get it
to stay put and looking good?

2) did you use foam under the headliner material (eg 1/8 or 1/4 landau foam), or just
glue it to the board? If you used foam, how has it held up over time?

3) any comments on the durability or clean-ability of this material?

4) suggestions on the best brand of glue to use, or how much is required?

5) anything you'd do differently??

thanks much,
Karen
1973 23'
1975 26'
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Karen 1975 26' San Jose, CA
 
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