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Adobe Brick R Value

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Chuck_17
Chuck_17 Member Posts: 148
in THE MAIN WALL
Anyone seen a reference for an R value of (8") adobe block?
I am trying to figue the heat loss of a house (used as an office) built with adobe blocks. The stuff looks like it could have been used in an eighteenth century barn.

Comments

  • Tom R.
    Tom R. Member Posts: 138
    Clay tile block

    My reference says 8" hollow clay block = 1.85, if that is what you have.
  • Matt Clina
    Matt Clina Member Posts: 90
    Came Across This Paper

    http://www.ferncometal.com/adobe-paper.htm

    It has some good information about adobe construction, and gives an R value of 0.25 per inch.

    There is a surprising comparison between identical structures built of adobe and cinder blocks, with tremendously different thermal results.
  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928
    From the US Dept of Energy

    Adobe uninsulated 10":

    (R-value)3.5 (U-value)0.284 (weight)95.0 (heat capacity)17.9


    insulated 10":

    (R-value)11.9 (U-value)0.084 (weight)95.3 (heat capacity)18.0

    uninsulated 24":

    (R-value)6.8 (U-value)0.147 (weight)183.4 (heat capacity)34.2


    exterior insulated:

    (R-value)24" 15.1 (U-value)0.066 (weight)183.6 (heat capacity)34.3
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