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[GMCnet] The Restoration. Insulation of the body [message #288991]

Mon, 19 October 2015 00:06

BobDunahugh

Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA

Karma: 11

Senior Member

I hope that my passing this project on will be of benefit to other. And that a mouse infested coach can be saved. And can be bought for vary little money. The bright side of saving this GMC. Is that in the end. I'm going to be able to have a GMC with better insulation, modern wiring systems, and everything new inside. Plus it'll be done in a way that will meet our every need. Besides. I wouldn't want to take a GMC that I paid $25,000. for. And then take it all apart just to improve it's wiring, and insulation. Now that I'm down to the walls. Except the rear bath. I now need to remove the paneling. That will be done Mon, or Tues. Then I need to work out the wiring in the next few days. Then the insulation issues. As I think I need to install the insulation, and wiring at the same time. My first thought is to glue in some of that pink sheet insulation. Use those cans of foam insulation to fill the small gaps along the edges. In this way I can fit the wires in the sheets of foam insulation. This will stop any movement of the wires in the walls. Like to have it all foam sprayed. But the scheduling of having it done all in one shot. At this point. I want to get the door widened once I have it cleaned out, no smell, and the wiring with insulation in. Bob Dunahugh78 RoyaleIowa
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Re: [GMCnet] The Restoration. Insulation of the body [message #288999 is a reply to message #288991]

Mon, 19 October 2015 07:06

Kimberlea Weeks

Messages: 675
Registered: July 2010

Karma: 6

Senior Member

Take lots of pictures. Pictures came with Bob & Marlys Drewes' custom
Painted Desert and it really is great to know where things are behind the
walls, cabinets, etc. especially in a custom coach.

*Thank you for being a member and supporting the GMC Motorhome lifestyle.*

*Kimberlea Weeks*
VP Administration and Convention Manager
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On Mon, Oct 19, 2015 at 12:06 AM, Bob Dunahugh wrote:

> I hope that my passing this project on will be of benefit to other. And
> that a mouse infested coach can be saved. And can be bought for vary
> little money. The bright side of saving this GMC. Is that in the end. I'm
> going to be able to have a GMC with better insulation, modern wiring
> systems, and everything new inside. Plus it'll be done in a way that will
> meet our every need. Besides. I wouldn't want to take a GMC that I paid
> $25,000. for. And then take it all apart just to improve it's wiring, and
> insulation. Now that I'm down to the walls. Except the rear bath. I now
> need to remove the paneling. That will be done Mon, or Tues. Then I
> need to work out the wiring in the next few days. Then the insulation
> issues. As I think I need to install the insulation, and wiring at the same
> time. My first thought is to glue in some of that pink sheet insulation.
> Use those cans of foam insulation to fill the small gaps along the edges.
> In this way I can fit the wires in the sheets of foam insulation. This will
> stop any movement of the wires in the walls. Like to have it all foam
> sprayed. But the scheduling of having it done all in one shot. At this
> point. I want to get the door widened once I have it cleaned out, no smell,
> and the wiring with insulation in. Bob Dunahugh78 RoyaleIowa
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Re: [GMCnet] The Restoration. Insulation of the body [message #289001 is a reply to message #288999]

Mon, 19 October 2015 07:26

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma: 6

Senior Member

Kim,

Excellent suggestion!

I did that when I restored the terrace house (town house) Helen and I live in here in Sydney back in the 1980's. They have proven to
be valuable aide memoire thirty years later!

Regards,
Rob M.
The Pedantic Mechanic

-----Original Message-----
From: Kimberlea Weeks

Take lots of pictures. Pictures came with Bob & Marlys Drewes' custom
Painted Desert and it really is great to know where things are behind the
walls, cabinets, etc. especially in a custom coach.

*Kimberlea Weeks*

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Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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Re: [GMCnet] The Restoration. Insulation of the body [message #289021 is a reply to message #288991]

Mon, 19 October 2015 11:28

A Hamilto

Messages: 4508
Registered: April 2011

Karma: 39

Senior Member

BobDunahugh wrote on Mon, 19 October 2015 00:06

...My first thought is to glue in some of that pink sheet insulation. ...

The pink stuff has an R-value of 5 per inch of thickness. Plain old fiberglass batting is R-4 per inch. There is polyisocyanurate stuff that has an R-value of 7 per inch of thickness.

In that 1.5 inches of wall thickness you have to work with, the pink stuff will give you a total of R-7.5 and the good rigid board or sprayed in closed cell stuff will give you a total of R-10.5.

MORE IS BETTER. Having the closed cell stuff sprayed in is the best you could do, but that might affect your timeline. It would also cost more.

IIRC, the extra cost difference for the higher R-value board is about $80 for the whole job (if you can find the material). Do what you want, but the work is the same for either material.

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Re: [GMCnet] The Restoration. Insulation of the body [message #289041 is a reply to message #289021]

Mon, 19 October 2015 19:53

Jp Benson

Messages: 649
Registered: October 2011
Location: Fla

Karma: 2

Senior Member

A Hamilto wrote on Mon, 19 October 2015 11:28

BobDunahugh wrote on Mon, 19 October 2015 00:06
...My first thought is to glue in some of that pink sheet insulation. ...
The pink stuff has an R-value of 5 per inch of thickness. Plain old fiberglass batting is R-4 per inch. There is polyisocyanurate stuff that has an R-value of 7 per inch of thickness.

In that 1.5 inches of wall thickness you have to work with, the pink stuff will give you a total of R-7.5 and the good rigid board or sprayed in closed cell stuff will give you a total of R-10.5.

MORE IS BETTER. Having the closed cell stuff sprayed in is the best you could do, but that might affect your timeline. It would also cost more.

IIRC, the extra cost difference for the higher R-value board is about $80 for the whole job (if you can find the material). Do what you want, but the work is the same for either material.

I removed just enough of the original sprayed insulation to install 3/4" polyiso foam from HD.

http://www.gmcmhphotos.com/photos/interior/p59279-interior-insulation.html

For the sidewalls I peeled the foil backing so the panels curved to match the wall. That was too much trouble for the ceiling.

I also removed all the bunk bed support framing. It was an aftermarket install and didn't match the wall curvature.
Still have the bunks if anyone wants them. They're big & heavy.

JP

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Re: [GMCnet] The Restoration. Insulation of the body [message #289050 is a reply to message #289041]

Tue, 20 October 2015 02:45

appie

Messages: 902
Registered: April 2013
Location: denmark

Karma: 2

Senior Member

Please take out your windowws and reseal them before doing the interior. You will know they will not leak

Appie eleganza 76 "Olga" now sadly sold 6 wheel discbrake Quadrabags Springfield stage 2 462 olds Manny tranny ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html Fulltiming in Europe july 2014 til july 2016 Denmark

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