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| Re: [GMCnet] Ceiling insulation/sound proofing [message #304629 is a reply to message #304623] |
Sun, 31 July 2016 10:27   |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Tiger Foam with a vapor barrier.
Dolph Santorine
DE N8JPC
Wheeling, West Virginia
1977 ex-Palm Beach TZE167V100820
1-ton, Sullybuilt Bags, Reaction Arms, 3.70 LSD, Manny Transmission, EV-6010,
> On Jul 31, 2016, at 10:56 AM, Nancy White wrote:
>
> Hello all! I have looked at the Forum, and there are many many entries
> addressing this issue, but honestly I found it a little confusing to sort
> through... Would you tell me in the Cliff note version of what worked for
> you to insulate your ceiling from heat/cold, as well as sound? We
> currently have only the original foam in place.... Thanks! Nancy
>
> --
> Nancy White 1976 GMC Glenbrook Classic Coach
> Westminster, Maryland juice.plus.nancy@gmail.com
> _______________________________________________
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| Re: [GMCnet] Ceiling insulation/sound proofing [message #304631 is a reply to message #304629] |
Sun, 31 July 2016 10:51 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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I used Microfilm, a multilayered aluminum foil and foam product to act as an insulation shield. It is waterproof and does not support combustion. Remove the flame and it goes out. I used an expanded foam product for the headboard (Komatex). It is waterproof and absorbs noise. Easy to work with.
The are other expanded foam products available, look at outdoor sign shops for materials.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Ceiling insulation/sound proofing [message #304635 is a reply to message #304623] |
Sun, 31 July 2016 13:44 |
A Hamilto
Messages: 4508
Registered: April 2011
Karma: 39
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Senior Member |
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Nancy White wrote on Sun, 31 July 2016 09:56Hello all! I have looked at the Forum, and there are many many entries addressing this issue, but honestly I found it a little confusing to sort through... Would you tell me in the Cliff note version of what worked for you to insulate your ceiling from heat/cold, as well as sound? We currently have only the original foam in place.... Thanks! Nancy
--
Nancy White 1976 GMC Glenbrook Classic Coach
Westminster, Maryland juice.plus.nancy@gmail.com I haven't done it myself, but I would take one of two approaches:
1. Level the existing foam and then use canned spray foam to glue the thickest layer of polyisocyanurate that will fit in the space on top of it:
http://www.gmcmhphotos.com/photos/power-level-valve-fitting/p44335-ceiling-insulation.html
2. Spray new foam directly on top of the old foam and then trim it down so the wall and ceiling panels will fit.
The only other approach that will actually raise the R-value would be to completely remove the old and spray in all new, but that is more trouble than it is worth.
Any insulation other than closed-cell spray or polyisocyanurate sheets will yield less R-value.
[Updated on: Sun, 31 July 2016 14:22] Report message to a moderator |
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| Re: [GMCnet] Ceiling insulation/sound proofing [message #304686 is a reply to message #304685] |
Mon, 01 August 2016 12:01 |
Ronald Pottol
Messages: 505
Registered: September 2012
Location: Redwood City, California
Karma: -2
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You can get aerogell blankets, it's pricey, but very high R value for the
thickness.
On Mon, Aug 1, 2016 at 9:45 AM, A. wrote:
> Nancy White wrote on Sun, 31 July 2016 09:56
>> ...Would you tell me in the Cliff note version of what worked for you to
> insulate your ceiling from heat/cold, as well as sound?...
> Go to http://www.gmcws.org/tech.htm
>
> Then scroll down to "Theory and Practice of GMC Insulation or What Do I
> Do? My GMC Is Too Hot! (or Too Cold!)"
> --
> 73 23' Sequoia 4 Sale
> 73 23' CanyonLands Parts Unit 4 Sale
> Upper Alabama
> "Highest price does not guarantee highest quality."
>
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Plato seems wrong to me today.
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1973 26' GM outfitted
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| Re: [GMCnet] Ceiling insulation/sound proofing [message #304688 is a reply to message #304686] |
Mon, 01 August 2016 12:42 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Mark bb said;
The only other approach that will actually raise the R-value would
be to completely remove the old and spray in all new, but that is more
trouble than
it is worth.
Any insulation other than closed-cell spray or polyisocyanurate sheets will yield less R-value.
sounds hard to believe, care to elaborate Mark?
adding more insulation makes for a lower R value?
> From: ronaldpottol@gmail.com
> Date: Mon, 1 Aug 2016 10:01:26 -0700
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] Ceiling insulation/sound proofing
>
> You can get aerogell blankets, it's pricey, but very high R value for the
> thickness.
>
> On Mon, Aug 1, 2016 at 9:45 AM, A. wrote:
>
>> Nancy White wrote on Sun, 31 July 2016 09:56
>>> ...Would you tell me in the Cliff note version of what worked for you to
>> insulate your ceiling from heat/cold, as well as sound?...
>> Go to http://www.gmcws.org/tech.htm
>>
>> Then scroll down to "Theory and Practice of GMC Insulation or What Do I
>> Do? My GMC Is Too Hot! (or Too Cold!)"
>> --
>> 73 23' Sequoia 4 Sale
>> 73 23' CanyonLands Parts Unit 4 Sale
>> Upper Alabama
>> "Highest price does not guarantee highest quality."
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Plato seems wrong to me today.
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: [GMCnet] Ceiling insulation/sound proofing [message #304689 is a reply to message #304686] |
Mon, 01 August 2016 13:00 |
A Hamilto
Messages: 4508
Registered: April 2011
Karma: 39
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Ronald Pottol wrote on Mon, 01 August 2016 12:01You can get aerogell blankets, it's pricey, but very high R value for the thickness. First place I landed on when pricing was $5.72 per square foot, for 10mm thick. Advertised at R-10 per inch, it would take 2.5 of those to get an inch thick, would cost more than $14 per square foot to get the same R-value that you can get for about a dollar per square foot with foam boards.
You can get R-15 in the inch and half you have to work with (if you remove the OEM foam) at a cost of less than $22 per square foot with aerogel. Rough Order of Magnitude estimate would be about $4000 to do the roof.
I wonder why it hasn't caught on?
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