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Old 08-21-2013, 07:11 PM   #16
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Mobile Home Wall insulation tool


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Originally Posted by jigami View Post
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.
in Arizona I do not think it is called for. Second how big is your Mobil? I have built sheds over moble homes and that has helped cut the heat down.

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Old 08-22-2013, 10:19 AM   #17
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Mobile Home Wall insulation tool


from inside the mobile home, there is carpet, then pading, and then plywood and then 2 by 4s running across.

so from the bottom of the trailer, i can see 2 by 4s and above that is the plywood.
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Old 08-22-2013, 10:21 AM   #18
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Mobile Home Wall insulation tool


it is long with several rooms. cover over it is not feasible
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Old 08-22-2013, 11:29 PM   #19
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Mobile Home Wall insulation tool


The lexan tool in the video was installing R-13 in the 2x4 walls.

R-30 @ 9-1/2" is compressed (by the manufacturer) to R-25 @ 8" and again compressed to R-21 @ 5-1/2" again comp. to R- 15 @ 3-1/2" each time the density increases as the thickness decreases = less R-value for the wall---- but the R-value per inch increases--- R-30 starts at 0.5#/c.ft. to R-25 @ 0.7#/c.ft. to
R-15 at 1.4 #/c.ft. : http://www.greenbuildingadvisor.com/...fiberglass.JPG

But, it would blow-out the wall metal or not install in enough to be effective. Density is of paramount importance in fiberglass batts to prevent convective looping, pp 45-47; http://www.buildingscienceconsulting...Measure_Up.pdf

R-19 (low density) is compressed to R-13 (medium density); pp. 68; http://www.buildingscience.com/docum...study-analysis

R-19 is the "biggest loser" of them all; The "biggest loser" in fiberglass insulation....

#7; Using attic insulation in interior walls.

Insulate under the living space as the ground there is close to the same temp as the ambient air temperature, along with radiation coupling, think reverse of this; http://www.buildingscience.com/docum...n-crawlspaces/

Gary

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