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02-25-2010, 04:51 PM
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#1
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4 Rivet Member
2005 16' International CCD
Austin
, Texas
Join Date: May 2009
Posts: 356
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What insulation did you use under the floor?
I've seen various posts on insulation. Curious to known what seems to be the best long-term solution. Obviously, the old water-absorbing pink stuff is not a good idea.
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02-25-2010, 05:13 PM
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#2
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Rivet Master
1991 34' Excella
Princeton
, New Jersey
Join Date: Aug 2003
Posts: 7,070
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The advantage to the pink stuff other than ease of installation is it is complete coverage. Any void, hole or edge gap, in an insulating medium is almost a complete lose of insulating value. The pink stuff has no voids.
This level of complete coverage is hard to accomplish with most other types except spray on insulation. The disadvantage of spray on is it will never dry if water is spilled on the floor and get through to the insulation. The disadvantage of using the pink stuff during a rebuild is you can't support it. In manufacturing it is draped over the frame and the floor laid down on it and it is this draping that supports it.
If you cut and fit block insulation you have to seal every seam or glue the complete perimeter of each block to keep air from migrating around the edges.
I don't know but if i were rebuilding and live in Texas I not sure if I would bother to attempt to insulate the floor. The air cell of a well sealed belly pan would almost be enough and not pose any of the problem wet insulation might bring over time.
__________________
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles
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02-25-2010, 05:24 PM
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#3
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Moderator
1968 17' Caravel
Battle Ground
, Washington
Join Date: Dec 2002
Posts: 12,255
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I think the insulation under my floor contributed to it rotting out. I didn't put any insulation under there when I replaced the wood.
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Stephanie
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02-25-2010, 05:57 PM
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#4
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Naysayer
1968 24' Tradewind
Russellville
, earth
Join Date: Jun 2005
Posts: 4,964
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My Trade Wind has spray foam under it that I think may have been applied by the factory. That stuff is bulletproof.
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02-25-2010, 06:24 PM
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#5
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Moderator
Vintage Kin Owner
...
, ...
Join Date: Jul 2007
Posts: 11,696
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Many of us opt not to use under floor insulation because of it's water retention characteristics.
Kevin
__________________
"One of the best lessons I've learned is that you don't worry about criticism from people you wouldn't seek advice from."
William C. Swinney
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02-25-2010, 06:38 PM
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#6
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Rivet Master
1968 24' Tradewind
Oxford,
, Mississippi
Join Date: May 2009
Posts: 1,564
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My 68 Trade Wind has spray foam under the belly pan as did Rodney's. At first I thought it was done by a PO, but upon further inspection I think it is original as there is no evidence anywhere that the bellypan has ever been removed from the trailer.
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02-25-2010, 07:07 PM
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#7
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2 Rivet Member
1992 29' Excella
Currently Looking...
THE RANCH
, Texas
Join Date: Jan 2010
Posts: 82
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HOWDY!! Anyone ever tried radiant heating underneath their new flooring? Seems that it might keep your little tootsies mighty happy.....Adios from TEXAS! C&S!!
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02-25-2010, 08:21 PM
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#8
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Rivet Master
1964 17' Bambi II
Vintage Kin Owner
Schererville
, Indiana
Join Date: Jul 2005
Posts: 2,637
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I am in the midst of redoing the underbelly of my trailer. I'm using Prodex insulation. There are numerous posts about this type of insulation. The good part is that it's easy to work with & doesn't absorb water. If you search under the word "Prodex", you'll come up with a lot of information about it. Here are a couple of pix of the process that I'm doing:
__________________
Becky
1964 Bambi II
1988 Avion 32S
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02-25-2010, 08:31 PM
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#9
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Silver Mist
Currently Looking...
Riverhead
, New York
Join Date: Aug 2006
Posts: 3,011
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I put Prodex on TOP of the floor then pergo.
All the old pink underneath is gone
__________________
Bob
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02-25-2010, 08:42 PM
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#10
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4 Rivet Member
1963 16' Bambi
Stevens Point
, Wisconsin
Join Date: Feb 2010
Posts: 318
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I didn't put any insulation in the floor of our trailer either. Fiberglass just gets wet and provides homes for critters. I did consider spray glueing a foil covered bubble wrap but then ,why? In our cold part of the country our homes, (while we have basements) don't have insulation under the floor.
Tim
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02-25-2010, 08:43 PM
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#11
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Remember, Safety Third
1973 27' Overlander
Catfish Corners
, Georgia
Join Date: Oct 2004
Posts: 5,720
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None. The '73's leak like a sieve in the belly pan by design. I corrected for this and put no insulation back in there in case it leaks again.
Jim
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02-25-2010, 10:45 PM
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#12
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4 Rivet Member
2005 16' International CCD
Austin
, Texas
Join Date: May 2009
Posts: 356
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Quote:
Originally Posted by LI Pets
I put Prodex on TOP of the floor then pergo.
All the old pink underneath is gone
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This seems like the best idea yet. Never thought about it on top of the subfloor.
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02-25-2010, 11:09 PM
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#13
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Silver Mist
Currently Looking...
Riverhead
, New York
Join Date: Aug 2006
Posts: 3,011
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This cold winter was the longest test we had, spending almost 3 months with many nites in the 20's and 30's, bare feet were fine.
__________________
Bob
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02-26-2010, 06:46 AM
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#14
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Rivet Master
1967 24' Tradewind
Greenville
, South Carolina
Join Date: Jan 2009
Posts: 1,107
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I'm going with 2" rigid foam spaced from the floor bottom with 1" rigid foam.
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02-27-2010, 09:43 PM
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#15
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4 Rivet Member
1970 27' Overlander
ARLINGTON
, TEXAS
Join Date: Jun 2009
Posts: 335
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Quote:
Originally Posted by SilverHoot
I'm going with 2" rigid foam spaced from the floor bottom with 1" rigid foam.
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Please explain
__________________
He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion...
Taylor 1/20/96 - 11/28/08
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02-28-2010, 05:27 AM
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#16
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Rivet Master
1955 22' Safari
Currently Looking...
Great Lake State
, .
Join Date: Nov 2005
Posts: 1,480
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None, insulation is nothing but a magnet for water contributing to floor rotting. Will be adding stainless steel air vent's to belly pan for proper air ventilation.
toastie
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02-28-2010, 06:39 AM
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#17
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Rivet Master
1967 24' Tradewind
Greenville
, South Carolina
Join Date: Jan 2009
Posts: 1,107
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Quote:
Originally Posted by WILDRTEXAS
Please explain
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1 " foam spacers similar to what Becky did in post #8, except I will be glueing 2" foam to the spacer instead of Prodex.
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03-03-2010, 09:48 AM
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#18
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2 Rivet Member
1965 17' Caravel
langley
, British Columbia
Join Date: Oct 2009
Posts: 30
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I didn`t use any insulation under the floor,i had so many mouse runs through the floor and walls,i figured i wasn`t going to give them a second chance,,,i ran the belly pans on my 65 caravel to the two main frames and left the center section open...i used 5/8 t&g fir and sealed the whole underside,,,i want to use cork flooring to finnish off the interior of the floor..does any body know if i should seal the top of the floor before i install the cork,,and what should i seal it with? I used a oil based paint for the bottom,,i`m also going to spray shutz the wheel wells and any where else the water might come in
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03-03-2010, 10:56 AM
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#19
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Rivet Master
1977 Argosy 24
Currently Looking...
Milltown
, Wisconsin
Join Date: Mar 2006
Posts: 1,087
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What is the purpose of spacing the foam away from the floor?
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03-03-2010, 11:04 AM
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#20
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Rivet Master
1967 24' Tradewind
Greenville
, South Carolina
Join Date: Jan 2009
Posts: 1,107
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The foam spacers serve two purposes. Create an air space which improves insulation and also allows for ability of any moisture that might get in, to get out.
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