How big, if any, should the gaps be between cement board when using for tile backer?

Discussion in 'Shower & Bathtub Forum & Blog' started by Arsinek, Apr 13, 2013.

  1. Arsinek

    Arsinek New Member

    Joined:
    Mar 31, 2013
    Location:
    Florida
    I saw someone saying you should have gaps between your pieces of cement board when using it for a tile backer. Is this true? If so how big should the gaps be? Also will the gap be the same size if its a cement board to drywall seam?
     
  2. kevinp

    kevinp In the Trades

    Joined:
    Apr 13, 2013
    Location:
    Missouri
    I believe all CBU should have an 1/8 gap that is filled with mortar. Some manufacturers require joints to be taped with a mesh tape.
     
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  4. Arsinek

    Arsinek New Member

    Joined:
    Mar 31, 2013
    Location:
    Florida
    I found this on Durocks website "Fit ends and edges of panels closely but not forced together."
     
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