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captain ron (207.30.240.101)

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Posted on Wednesday, May 12, 2004 - 9:49 pm:   

next week I am starting on the interior on my 4905
starting with the headliner. I plan to use 3/4 inch foil faced foam doubled in the flat areas.
in the rounded areas I plan to reuse the original celuloid sealed in plastic. then put the same 1/8" foam I used on the exterior over the the entire area including the metal ceiling joists.
then use 1/4" luan. but the metal joist are spaced to far apart and will require wasting a lot of material. any sugestions or comments?
John the newby (199.232.240.180)

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Posted on Friday, May 14, 2004 - 9:29 am:   

I'm surprised no-one answered you yet. I guess it's safe to throw
my nickles worth in?

When we insulated the floor of our house (not an rv), we used the
same type material (although thicker). There's little if any "waste",
since neatness doesn't count. Just cut or break it up as needed and
force it into whatever area needs an extra amount. The spray cans
of foam work also, around areas that we needed a tight seal.

I don't see where a bus ceiling would take any different method,
but now that I said that, maybe someone will add to it?
CoryDane RTSII (66.155.188.134)

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Posted on Friday, May 14, 2004 - 9:08 pm:   

I am about to begin insulation myself so I am not the answer man, yet.

I was told that most often, the bus insulation that the mfgr used was poor at best. the thin stuff that looks kinda like cardboard they say to toss, esspecially if it ever were wet.

I talked to a company that built buses, and they would not suggest anything (legal worries I guess).

HOWEVER, the talk that I had indicated that a good foam insulation on the wall just under the panel, behind that, a layer of 1/4" poly insul with a metalic barrior on both sides, with dead air space, min 3/4".

They stressed that you had to stop any air penetration as first priority. Insulation types after that are second consideration, though important depending on the climates you plan to visit.

My ceiling space will be very thin, so I will be using a sheet of the poly with metalic coatings there. I plan to use similar under the pergo floor. The walls will have a layer of foam insul with a sheet of the poly/metalic and dead air space.

There is, of course, having the walls foamed. This method could very well be the #1 way to go though costly, messy and time consuming. Unfortunately, I was unable to sacrafice time in many aspects of my hobby until lately.

I suggest if you use the riged foil faced foam, that you foam the edges with the can foam to seal against the beams. As mentioned before, it is crucial to seal the air out or all your endeavors and cost for insulation will be for little gain.

"Imagine"
cd
Jeff (Jeff) (68.10.1.118)

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Posted on Saturday, May 15, 2004 - 2:43 pm:   

A friend has used this stuff on his bus. May take a look. I am too far along to stop and do it his way. http://radiant-technology.com/ Is the site. The stuff is not all that thick so you will not use much interior room.

Jeff

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