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U value of glass

  1. May 9, 2009 #1
    hey guys just a quick question
    Does anyone know the u value of jusy normal glass?
    Ive looked everywhere and ive got different answers on source says 5.4 and another says something like 1.08, 5.5 seems pretty high but i think id better find out for sure thanks for any reply's:)
  2. jcsd
  3. May 9, 2009 #2

    Vanadium 50

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    What is a U-value?
  4. May 9, 2009 #3
    U value is the inverse of R value which is a measurment of how well a material insulates
  5. May 9, 2009 #4


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    Staff: Mentor

    For a single pane window with plain, ordinary 1/4" glass, I use a u-value of around 1. Here's a table I just googled: http://www.calglassbending.com/secptabl.htm [Broken]
    Last edited by a moderator: May 4, 2017
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