R Value in underbelly

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Doing lots of plumbing changes here as we set up our trailer on our new 'homestead'--curious - does anyone know what the R value of the insulation in the underbelly is? When working in a part of the underbelly where the pipes aren't close to vents - when I get it all put back together I want to make sure to have it right. Thanks in advance for any and all help - you are the best!!!:-D
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Check the cover for your circuit breakers, there should be a HUD spec. sheet that gives R values, roof load rating, and other design specs. Greg
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The amount of insulation in the floor is limited to the size of the floor joists. Most homes will have 2x6 floor joist and have R-19 batt insulation. There is also a high density batt insulation for use in 2x6 voids which is R-21

JD
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