stillgotomx
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1964 Chinook Tow-trailer 13'
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Post by stillgotomx on Apr 24, 2019 8:29:32 GMT -8
$$$$$$ All I really care about is which is cheaper? Pink stuff or rigid, including wraps as needed? I am into thi$ enough that I think I'd u$e crinkled new$paper, ha ha. $$$$$
Any thought$?
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aslmx
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Post by aslmx on Apr 24, 2019 17:31:23 GMT -8
$$$$$$ All I really care about is which is cheaper? Pink stuff or rigid, including wraps as needed? I am into thi$ enough that I think I'd u$e crinkled new$paper, ha ha. $$$$$ Any thought$? I think the rigid board is around $15 a sheet at Lowe’s. I was lucky enough to get mine free off a job I did. I’m not sure how much the pink stuff is. If you were close to me , I have 6 sheets of the rigid that you can have.
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nccamper
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1962 Forester- 1956 Shasta
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Post by nccamper on Apr 24, 2019 18:11:54 GMT -8
The pink is cheap. Especially if the walls are 3/4" thick. Where you really shouldn't cheap out is the vapor barrier. I like Tyvek.
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WhitneyK
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'67 Shasta Compact
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Post by WhitneyK on Apr 24, 2019 18:16:47 GMT -8
I had a thought (didn't say it was a good one). If ya'll have trouble finding 3/4", could you use 1/2" foam AND top it off with the pink fiberglass to give it the "Mobiltec" puff factor? (best of both worlds?)
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stillgotomx
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1964 Chinook Tow-trailer 13'
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Post by stillgotomx on Apr 24, 2019 19:27:33 GMT -8
I did get some 1" rigid foam today at Lowe's for $11 a sheet, not too bad. It is for the ceiling. Will have to use something thinner, I guess 3/4, for the 1x4 framing, and that stuff seems so thin it hardly seems worth putting in there. Duly noted about the vapor barrier -- thanks.
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Post by Vintage vision on Aug 1, 2020 6:23:13 GMT -8
Completely restoring/rebuilding a 1966 Shasta, using 1x4s for the walls. Would it be that bad to use 1” rigid foam board as insulation even though the true thickness of the boards are only 3/4”??
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Post by vikx on Aug 1, 2020 10:19:59 GMT -8
Insulation thicker than the walls doesn't work very well. You'd be surprised how "tough" (non mashable) foam is. I've had bulge problems trying it. Even fiberglass should have the air factor and not be collapsed tightly. It loses R value when it is.
If you are having trouble finding 3/4 foam, you should be able to order it from a box store. 1" may work in the ceiling cavity IF the rafters are thicker than the walls. Otherwise, fiberglass or Reflectix work well, especially on the curves.
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Post by Vintage vision on Aug 1, 2020 18:43:23 GMT -8
Thank you. Thinking about 1/2” foam board then reflect X over that? This camper will probably have to endure some time in N Dakota in the winter so trying to get the best R rating that I can.
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Post by vikx on Aug 1, 2020 20:18:50 GMT -8
I'd try to order 3/4 foam if you can get it. When tightly in between the wall framing, it really insulates. 1/2 with Reflextic would be OK but foam is better.
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Post by Vintage vision on Aug 2, 2020 6:23:14 GMT -8
Okay, will do! Thank you so much!
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Post by Teachndad on Aug 3, 2020 12:31:48 GMT -8
Hi Friends, Cool reboot of a 7 year old thread. I was watching one of Mobiltec's class most recently on the topic of insulation. So, one of the points that Larry brought up was something he called a heat memory that occurs when the trailer is insulated with styrofoam insulation. For the sake of a(controversial?)discussion, he felt that styrofoam insulation insulates well in the morning before it gets hot, but then it heats up as the day goes on with more sun exposure. The result is that the a trailer with styrofoam insulation will hold the heat longer into the evening because it's now heated up and then holds the heat like a heat memory thereby keeping the trailer hotter longer than using fiberglass insulation. Comments?
NCcamper mentioned the breathability of Tyvek vapor barrier in an earlier post in this thread. Quote is below.
Oct 22, 2017 5:40:26 GMT -7 nccamper said: "I like the pink insulation with Tyvek wrap so it can breath. But the truth is, if the camper is stored uncovered and the putty fails there will be water damage."
Are all vapor barriers breathable?
Thanks Rod
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Post by vikx on Aug 3, 2020 22:27:51 GMT -8
My trailers with foam insulation are super comfortable in any weather. I've never had trouble with the foam heating up the interior of the trailer.
Most house vapor barriers are breathable.
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Post by wisconsinjoe on Aug 21, 2020 6:09:24 GMT -8
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Post by wisconsinjoe on Aug 21, 2020 6:13:13 GMT -8
I used the rigid shown in the picture. Where it was needed I used construction adhesive to hold it in place. Really nice job. How did you bend the rigid foam to follow the curves so perfectly?
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aslmx
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Post by aslmx on Jul 11, 2021 10:11:21 GMT -8
I learned doing custom vans in the 70's that fiberglass holds moisture. I’m confused now, it has been recommended to use fiberglass but your saying it is not good to use? Is pink insulation fiberglass? maybe talking about pink styrofoam board.
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