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Old 08-19-2013, 04:31 PM   #1
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I want to insulate all the walls of our mobile home with the fiber glass material. It is in Arizona and so it is hot. I was thinking to insulate with R 30 material. On Youtube, I have seen lexan material that was used to push the insulation between the exterior siding and the interior wall. It was angled as well. Where could I get that?

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Old 08-19-2013, 07:27 PM   #2
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Hmmm...?

Many questions.

Are the walls open on your mobile home? If so, how are you going to get 10" of fiberglass in there?

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Old 08-19-2013, 08:07 PM   #3
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No, the walls are not open. This is an existing trailer home. Because of the heat, I want to insulate even further. There is minimum amount of insulation in the walls. I wanted to put in R 30 insulation. On youtube - http://www.youtube.com/watch?v=wQ4li6DevUE[/URL]. It shows lexan with a curve on it in order to push the fiber glass. How can I get a curved lexan?
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Old 08-19-2013, 08:30 PM   #4
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10" thick R30 insulation when compressed to only 3" thick, is about R9.
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Old 08-21-2013, 10:42 AM   #5
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I didn't know that...so to have R30 as effective, it should have the space of min 10"?
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Old 08-21-2013, 10:43 AM   #6
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thx...I need to find a curved or angled lexan from home depot or others
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Old 08-21-2013, 04:30 PM   #7
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Originally Posted by jigami View Post
I didn't know that...so to have R30 as effective, it should have the space of min 10"?
Afraid so. Fiberglass insulated 2X6 walls are only R19. So you can't get your walls to R30 with fiberglass batts. Just s well off only getting R11 batts.
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Old 08-21-2013, 04:39 PM   #8
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Well then, with about 6" of space, what should I use to insulate them from Arizona heat? I feel, his could get expensive.
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Old 08-21-2013, 04:42 PM   #9
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You better check to see if you have 2X6 exterior walls, and how much insulation is already in them, before you invest in insulation you won't get any benefit from.

2X6 wall, would be 6" batts of R19.
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Old 08-21-2013, 04:45 PM   #10
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Agree...Thx for your replies...
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Old 08-21-2013, 05:03 PM   #11
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Is it worth insulating the bottom portion of the trailer? There is no insulation there right now. I was thinking to put insulation on the tarp and nail the tarp to the bottom of the trailer.
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Old 08-21-2013, 05:21 PM   #12
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There should be insulation between the tarp and the floor. Check if there is.
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Old 08-21-2013, 05:36 PM   #13
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Currently, there is NO insulation in the belly area. when i look under the trailer i don't see any insulation at the bottom
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Old 08-21-2013, 06:42 PM   #14
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So you see the floor when you look under the trailer.
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Old 08-21-2013, 08:08 PM   #15
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Quote:
Originally Posted by beenthere View Post
You better check to see if you have 2X6 exterior walls, and how much insulation is already in them, before you invest in insulation you won't get any benefit from.

2X6 wall, would be 6" batts of R19.
Um batts for 2x6 they are R 21 not R 19 EPA energy guide lines.

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