Home » Public Forums » GMCnet » FRP for headliner
| FRP for headliner [message #353702] |
Sat, 11 April 2020 12:18  |
skip2
Messages: 544
Registered: September 2011
Location: Winter Haven,FL (center o...
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Good afternoon all,
Since the beast will be in dry dock for at least another month I've decided to tackle the headliner replacement. Anyone out there that has used FRP got any ideals and suggestions. I've got the basics figured out but haven't heard if the FRP needs any kind of luan for backing or is the FRP rigid enough on it's on. Any ideals will be greatly appreciated.
Skip Hartline
74 Canyon Lands, FiTech,
3.7 FD LSD, Manny Tranny,
Springfield Distributor,
2001 Chevy Tracker Ragtop Towd
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| Re: [GMCnet] FRP for headliner [message #353706 is a reply to message #353702] |
Sat, 11 April 2020 13:05  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Skip,
I did an FRP headliner several years ago in the X-Palm Beach my son now
has. It's standing up extremely well, as expected from its imperious
nature. I don't remember a lot about the installation except for one
point: Don't count on securing anything, like light fixtures, to ONLY
FRP. It isn't thick enough to hold screws well on its own. Anywhere you
plan to install such things should be backed up with plywood or other good
screw-holding material. Because those things go in last, you must plan
ahead for the location and configuration of those "backers" and secure them
in place with Liquid Nails or similar adhesive.
I was concerned about the acoustic properties of the hard FRP surface, but
according to my son and family, the interior acoustics are good (but they
have nothing to compare it to).
Ken H.
On Sat, Apr 11, 2020 at 1:19 PM Skip Hartline via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Good afternoon all,
>
> Since the beast will be in dry dock for at least another month I've
> decided to tackle the headliner replacement. Anyone out there that has used
> FRP
> got any ideals and suggestions. I've got the basics figured out but
> haven't heard if the FRP needs any kind of luan for backing or is the FRP
> rigid
> enough on it's on. Any ideals will be greatly appreciated.
>
> Skip Hartline
> --
> 74 Canyon Lands, FiTech,
> 3.7 FD, Manny Tranny,
> Springfield Distributor,
> 2001 Chevy Tracker Ragtop Towd
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] FRP for headliner [message #353708 is a reply to message #353706] |
Sat, 11 April 2020 13:22 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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I used some frp panels to replace sections of failing headliner in my last
coach. What Ken mentions about screw holding ability are true however
fastening to frp is easy if you use j nuts. If you try to carry too much
span the weight of the frp will cause it to droop. I cannot remember the
spacing at which I pinned mine to the roof stringers but I believe it was
every other roof stringer.
Sully
Bellevue wa.
On Sat, Apr 11, 2020 at 11:06 AM Ken Henderson via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Skip,
>
> I did an FRP headliner several years ago in the X-Palm Beach my son now
> has. It's standing up extremely well, as expected from its imperious
> nature. I don't remember a lot about the installation except for one
> point: Don't count on securing anything, like light fixtures, to ONLY
> FRP. It isn't thick enough to hold screws well on its own. Anywhere you
> plan to install such things should be backed up with plywood or other good
> screw-holding material. Because those things go in last, you must plan
> ahead for the location and configuration of those "backers" and secure them
> in place with Liquid Nails or similar adhesive.
>
> I was concerned about the acoustic properties of the hard FRP surface, but
> according to my son and family, the interior acoustics are good (but they
> have nothing to compare it to).
>
> Ken H.
>
> On Sat, Apr 11, 2020 at 1:19 PM Skip Hartline via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> Good afternoon all,
>>
>> Since the beast will be in dry dock for at least another month I've
>> decided to tackle the headliner replacement. Anyone out there that has
> used
>> FRP
>> got any ideals and suggestions. I've got the basics figured out but
>> haven't heard if the FRP needs any kind of luan for backing or is the FRP
>> rigid
>> enough on it's on. Any ideals will be greatly appreciated.
>>
>> Skip Hartline
>> --
>> 74 Canyon Lands, FiTech,
>> 3.7 FD, Manny Tranny,
>> Springfield Distributor,
>> 2001 Chevy Tracker Ragtop Towd
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] FRP for headliner [message #353711 is a reply to message #353709] |
Sat, 11 April 2020 15:21 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Best ceiling I ever saw in a GMC a wood worker/shipwright did to his coach.
Longitudinal strips of teak about 1" wide, with occasional lateral strips
of a lighter colored steam bent wood that fit the curve of the interior
roof. Looked like a Chris/Craft or Garwood yacht from the 30's or 40's.
Truly outstanding fit and finish. Would have taken me a couple of years to
do. Don't know how long it took him, but, all the interior cabinets were
much the same quality. Left me speechless.
Artisans like him are few and far between. I can think of two in our
world. Hal St.Clair, and a guy named Pinkerton. Stand in awe when around
either of them, you are in the shadow of greatness.
Jim Hupy
Salem, Oregon
On Sat, Apr 11, 2020, 12:26 PM Larry via Gmclist
wrote:
> This is what I used. Adds an R3 insulation value, plenty stiff. I glued
> Hull-liner to it. to give it a soft look and for sound absorption. JWID
>
> http://www.gmcmhphotos.com/photos/g4446-new-ceilings-or-headliner.html
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
> _______________________________________________
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| Re: [GMCnet] FRP for headliner [message #353713 is a reply to message #353702] |
Sat, 11 April 2020 15:44 |
Len Novak
Messages: 676
Registered: February 2004
Location: Las Vegas, NV
Karma: -3
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Try 3/16 ABS plastic with a pebble finish. Bulletproof!
Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Fallbrook, CA new email: B52Rule@Roadrunner.Com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Skip
Hartline via Gmclist
Sent: Saturday, April 11, 2020 10:19 AM
To: gmclist@list.gmcnet.org
Cc: Skip Hartline
Subject: [GMCnet] FRP for headliner
Good afternoon all,
Since the beast will be in dry dock for at least another month I've decided
to tackle the headliner replacement. Anyone out there that has used FRP
got any ideals and suggestions. I've got the basics figured out but haven't
heard if the FRP needs any kind of luan for backing or is the FRP rigid
enough on it's on. Any ideals will be greatly appreciated.
Skip Hartline
--
74 Canyon Lands, FiTech,
3.7 FD, Manny Tranny,
Springfield Distributor,
2001 Chevy Tracker Ragtop Towd
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Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Las Vegas, NV new email: B52sRule@Gmail.com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
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| Re: [GMCnet] FRP for headliner [message #353718 is a reply to message #353706] |
Sat, 11 April 2020 17:31 |
Gerard Hickey
Messages: 53
Registered: June 2019
Karma: 1
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I purchased my coach almost exactly one year ago and it has FRP
installed for the headliner. Actually did not know what FRP was and had
to go look it up. I can say it is an excellent headliner material and
the acoustics within the coach are perfectly normal. No hard sounds or
echoing at all. I have been quite happy with it.
I have all of the headliner out right now to rewire everything. It had
metal strips at each cross member to hold the FRP up and that was
perfectly fine. There were no dips or points that concerned me. The
straight FRP held at the cross members is rigid enough, but then I have
nothing hanging from just the FRP. I would agree that if you are going
to hang anything that it will need to be braced as the FRP will not be
strong enough to support much more than its weight. I suppose if you are
hanging something that is a pound or so, you might get away with it.
When I pulled out my FRP, I did find that there were 2 pinch points
which caused me to splinter 2 panels. I will need to cut two new ones
and replace them. One was just inside the door against the side of the
refrigerator and the other was above the closet. In both cases I have
been considering using a jack to try to lift the roof up about an 1/8 of
an inch so that I can get the replacement FRP installed.
I have been planning on putting the FRP back in, but I like the idea of
the Durotherm Lite that Larry used. I like the thought of getting a bit
more R factor into the ceiling. Now if I can find some of that out here
on the west coast (around Seattle).
Good luck.
--
Gerard Hickey / WTØF IRLP:3067/Echolink:529661
hickey@kinetic-compute.com DMR: 3102272
425-395-4554
On 4/11/20 11:05 AM, Ken Henderson via Gmclist wrote:
> Skip,
>
> I did an FRP headliner several years ago in the X-Palm Beach my son now
> has. It's standing up extremely well, as expected from its imperious
> nature. I don't remember a lot about the installation except for one
> point: Don't count on securing anything, like light fixtures, to ONLY
> FRP. It isn't thick enough to hold screws well on its own. Anywhere you
> plan to install such things should be backed up with plywood or other good
> screw-holding material. Because those things go in last, you must plan
> ahead for the location and configuration of those "backers" and secure them
> in place with Liquid Nails or similar adhesive.
>
> I was concerned about the acoustic properties of the hard FRP surface, but
> according to my son and family, the interior acoustics are good (but they
> have nothing to compare it to).
>
> Ken H.
>
> On Sat, Apr 11, 2020 at 1:19 PM Skip Hartline via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> Good afternoon all,
>>
>> Since the beast will be in dry dock for at least another month I've
>> decided to tackle the headliner replacement. Anyone out there that has used
>> FRP
>> got any ideals and suggestions. I've got the basics figured out but
>> haven't heard if the FRP needs any kind of luan for backing or is the FRP
>> rigid
>> enough on it's on. Any ideals will be greatly appreciated.
>>
>> Skip Hartline
>> --
>> 74 Canyon Lands, FiTech,
>> 3.7 FD, Manny Tranny,
>> Springfield Distributor,
>> 2001 Chevy Tracker Ragtop Towd
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] FRP for headliner [message #353720 is a reply to message #353718] |
Sat, 11 April 2020 19:27 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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On my 1975 GMC, Interior by Avion, I used a product called Komotex. It was 6mm thick and is metric sized sheets. Bigger than a 4'x8' sheet of 1/4" ply, or Luan. I had called the supplier and asked for 4'x8' sheets, without think of it's actual size. I did ask for the cutoff pieces from the dealer. A good move. I used 3 full sheets, plus most of the cutoff sections. I had purchased 5 sheets.
This material is 100% waterproof, cuts easily, flexible but does not need support behind it. Has a nice surface finish, smooth on one side and slightly rough on the other, so it's your choice. I was able to suspend interior lights, without deforming the material from
the ceiling. It will burn, but once the flame is removed, it self-extinguishes. Komotex is used for the outside sign business, so appears to be durable.
P.M. me a mailing address, and I'll send you an envelope sized piece
Tom
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] FRP for headliner [message #353722 is a reply to message #353720] |
Sat, 11 April 2020 20:58 |
Jim Felich
Messages: 1
Registered: April 2020
Karma: 0
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Junior Member |
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Thomas,
Where did you buy the Komatex?
How flexible is it?
Please send me a piece.
Jim Felich
209 Golf Club Drive
Santa Cruz, CA 95060
Thank you.
On Sat, Apr 11, 2020 at 5:28 PM Thomas Phipps via Gmclist <
gmclist@list.gmcnet.org> wrote:
> On my 1975 GMC, Interior by Avion, I used a product called Komotex. It
> was 6mm thick and is metric sized sheets. Bigger than a 4'x8' sheet of 1/4"
> ply, or Luan. I had called the supplier and asked for 4'x8' sheets,
> without think of it's actual size. I did ask for the cutoff pieces from the
> dealer. A good move. I used 3 full sheets, plus most of the cutoff
> sections. I had purchased 5 sheets.
> This material is 100% waterproof, cuts easily, flexible but does not need
> support behind it. Has a nice surface finish, smooth on one side and
> slightly rough on the other, so it's your choice. I was able to suspend
> interior lights, without deforming the material from
> the ceiling. It will burn, but once the flame is removed, it
> self-extinguishes. Komotex is used for the outside sign business, so
> appears to be
> durable.
> P.M. me a mailing address, and I'll send you an envelope sized piece
> Tom
> --
> 2012 Phoenix Cruiser model 2552
> KA4CSG
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: FRP for headliner [message #353725 is a reply to message #353702] |
Sun, 12 April 2020 07:46 |
skip2
Messages: 544
Registered: September 2011
Location: Winter Haven,FL (center o...
Karma: 3
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Senior Member |
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Thanks for all the replies, there's a lot more options out there, more than I realized. Any more out there will be welcome.
Skip Hartline
74 Canyon Lands, FiTech,
3.7 FD LSD, Manny Tranny,
Springfield Distributor,
2001 Chevy Tracker Ragtop Towd
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| Re: FRP for headliner [message #353732 is a reply to message #353725] |
Sun, 12 April 2020 10:59 |
mghamms
Messages: 466
Registered: March 2016
Location: Ware, Massachusetts
Karma: 2
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mine came with about a hundred thumb tacks to hold the headliner up.
was going to be one of my first projects 4 years ago.
i just got use to it.
1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
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| Re: FRP for headliner [message #353810 is a reply to message #353702] |
Wed, 15 April 2020 07:54 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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They're held in place with bolts whichanchor in Rivnuts<tm> in the structural aqluminum. Much easier to get down if you have a helper to hold the cabinet while you back the bolts out. If a Rivnut spins with the bolt, use a cutoff wheel and take the head off.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: FRP for headliner [message #353834 is a reply to message #353826] |
Thu, 16 April 2020 08:45 |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Richard RV wrote on Wed, 15 April 2020 22:14Larry wrote on Sat, 11 April 2020 12:25This is what I used. Adds an R3 insulation value, plenty stiff. I glued Hull-liner to it. to give it a soft look and for sound absorption. JWID
http://www.gmcmhphotos.com/photos/g4446-new-ceilings-or-headliner.html
Larry,
I like the Duro-Therm H-section divider molding.
https://www.menards.com/main/mouldings/panel-mouldings/durotherm-trade-lite-durolam-lite-white-divider-moulding-for-wall-panels/mld2066p/p-14444506063 92.htm
The narrow visible section would give a nice clean look if you were putting up the board by itself.
What did you use at the seams with the hull liner applied?
Richard
When I did this, the Duro-Therm H-section divider molding, was not available, but some like stuff was. Got it also at Menards in with the moldings. The stuff I used is just like the Duro-Therm H-section divider molding but with a narrower back side. You just gotta take some time to look through all of the moldings and pick what looks like it would work. The Hull liner is quite compressible, so was no problem to fit it in the "H" with the Duro-Therm. JWID
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
[Updated on: Thu, 16 April 2020 08:47] Report message to a moderator |
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| Re: [GMCnet] FRP for headliner [message #353842 is a reply to message #353836] |
Thu, 16 April 2020 11:00 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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I don’t know if I would trust a sheet metal screw to stay tight in the thin
aluminum ribbing with the weight of the cabinet hanging there. Using the
existing (or added) nutserts and a machine screw more dependable.
My 2c
Sully
Bellevue wa.
On Thu, Apr 16, 2020 at 7:04 AM Larry via Gmclist
wrote:
> BTW, when I put the Duro-Therm up, I measured between the electric
> channels on either side of the coach bending the tape measure to follow the
> curve
> of the roof. I took that measurement and added a couple of inches. Then
> placed the edges of the Duro-Therm at the electric channels and tried to
> "POP" the ceiling into place. If I could not pop it, I shaved a little off
> of the edge and tried again. Shaved a little...tried to pop...shaved a
> little...tried to pop. Finally got the right width of Duro-Therm so that
> it popped firm into place against the roof ribbing. Doing that, eliminates
> the need to somehow screw...glue...whatever.. it in place while you try to
> put the cabinets etc up. Take pictures of the ceiling with dimensions of
> where the ribs are so you can find the ribs when the cabinets have to go
> up. Then, I used an icepick to poke through the Hull Liner/ Duro-Therm to
> verify rib location before I put self tapping screws through cabinet into
> the ribs. Sorry, no pictures. I was so intent on NOT running a screw
> though the roof that my concentration kept me from the camera. :roll: JWID
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
> _______________________________________________
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: FRP for headliner [message #353854 is a reply to message #353836] |
Thu, 16 April 2020 13:04 |
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Richard RV
Messages: 631
Registered: July 2012
Location: Full-timer for 12 years, ...
Karma: -17
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Senior Member |
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Thanks for the write up, Larry. Are the sheet metal screws holding up the cabinets or just the Duro-Therm?
Definitely would like to see it in person next time I see you. Hopefully that'll be sooner rather than later.
Richard
'77 Birchaven TZE...777;
'76 Palm Beach under construction;
‘76 Edgemont waiting its turn
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