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Old 04-25-2005, 02:03 AM   #15
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Thanks Marc, I had to do it. Too many issues not to go this route. If I knew this was going to turn into this kind of a project I would have left it on the lot. The Caravel has been neglected for a very long time. No way to see some of the problems I have found though. I will have a very nice comfy AS when I am done, however. :-)
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Old 04-25-2005, 11:40 AM   #16
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I was told that rigid foam would not withstand the vibrations in a trailer. I know some forum members are using it so maybe in 20-30 years we will have better statistics than we do now about how true that really is. Anyway, when I removed my floor I was pleasently surprised at how well my original insulation has held up over the last 50 years. I had no signs of rodents or problems of the insulation holding water. My frame was in pretty good shape other than a couple cracked welds which I don't think had anything to do with the insulation. Bottom line- make sure you go over your entire unit with a fine tooth comb and make sure any and all possible leaks are sealed. One more reason I like the fiberglass system is it will be a better sound barrier than the foam board. I plan on rodent proofing my bellypan before I'm done to be sure I don't have any future problems that others have had.
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Originally Posted by fireflyinva
58 Bubble-

Did they say why they recommended fiberglass? FWIW, we started tearing our trailer up this weekend. Generally, we found that in most places, our vintage (about 45 years old) insulation batting is in surprisingly good shape. In one area, fluid from a battery leak collected. There, the batting disolved, along with the steel frame members...

We are thinking of replacing the batting between the floor and the bellypan with rigid foam insulation, for sake of added water resistance. Curved surfaces--like the wall, will get replacement batting...

Or at least that's our plan at this point.

Mary
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Old 04-25-2005, 01:54 PM   #17
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That's something to think about. It appears to be a bit of a toss up. What about a hybrid--foam on a cushion of fiberglass? hmmm....

I'm happy to say, we haven't found rodent signs so far. There are two small gashes in the bellypan, probably caused by rocks. As a temporary move, I sealed these holes with expanding foam, which was advocated on some cable home improvement show as a stopgap against rodents (for houses). We've been out with it for a year, and the foam seems to have stayed put--and there's no sign of rodents, either. It's a bandaid solution, but it seems to have worked ok.

Mary
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Old 04-25-2005, 02:08 PM   #18
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When I 1st got mine about a year ago I also used expanding foam to seal the bellypan. I've seen other threads that say not to completely seal the bellypan so I am going to figure out someway to make it rodent proof and still be able to breath. I'll probably end up using some kind of screen material or similar. Good luck on your research and keep us posted as to what you decide to go with.
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Old 04-25-2005, 04:54 PM   #19
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A few thoughts about fiberglass

I am sure that installing fiberglass insulation is by far the easiest way to insulate. The stuff is flexible and compressable making it easy to fit into unusually shaped cavities without having to take all that much care in cutting it. It is in fact so compressable that you can lay it across the frame members and install the floor on top of it. My guess is that particular factory technique was more motivated by ease of installation than by any other reason. The fiberglass itself does have the advantage of being water proof. My fiberglass insulation was actually in pretty good shape in general but did appear to have contributed some to frame rust in areas where the insulation had trapped moisture. Overall it is not all that bad of a choice if you can keep the rodents out and keep things more or less dry. It does provide reasonable levels of insulation for an RV.
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Old 04-25-2005, 09:39 PM   #20
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I can't find it now, but someone on here used these small aluminum vents to allow the belly pan to breathe. They were round and had screen on the backside.
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Old 04-25-2005, 10:44 PM   #21
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I think I've seen the same thread. That seems to be a great idea that I will probably use.
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Old 04-25-2005, 11:29 PM   #22
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I want to provide some vents into my belly pan area too. The closest I have seen to something pre-fabricated in my neck of the woods are some small aluminum vents at home depot about 2" in diameter. The ones that I saw were designed to go into a hole that was drilled into wood such as might be under the edge of your roof on your house. They have cylindrical sides that are 1/2" to 3/4" tall. I think maybe they could be modified to serve the purpose by slitting the sides and folding them back inside the belly pan. I suspect that it might also work to just drill some holes in the belly pan maybe 1/2" to 1" in diameter and fasten screen over them from the inside using a bead of vulkum.

Malcolm
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Old 04-30-2005, 03:12 PM   #23
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Hey all.

I made my insulation decision today. Itis going to be r-11 with the paper removed on the inside walls and foam board under the floor. I went with the foam board because of the rodent issue and if I need to remove it for any reason it won't be such a mess. Thanks for all the replies !! Opinions still welcome
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