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  1. #1
    Join Date
    Jan 2011
    Posts
    27

    Question Mortor to field stone

    I have a 140yoh. It has a fieldstone on all but one wall, this is cinder block. The field stone is in really good shape.

    It is amazing what people could do with a pile of rocks and sand to make walls straight and strong for many years.

    What type of morter mix should I use on the fieldstone to secure this all together?

  2. #2
    Join Date
    Aug 2009
    Location
    Ladson,SC
    Posts
    192

    Default Re: Mortor to field stone

    Mortar dating back to that period would have been Quick Lime and river sand.
    To match on todays standards if possible start with a sample and have a lab analyze it for make-up.
    Second option is to use a type "O" mortar mix.
    You can find these at Virginia Lime Works and U S Heritage Group. and Cathedral Stone.
    Last and maybe not the best is to mix your own.
    Start with this formular.
    9 parts sand
    2 parts sand
    1 part WHITE cement
    to adjust this mixture increase sand to a max of 12 parts.
    In 1980 I used the following formular on the Church pictured on the front of Preservation Brief # 22 upper right corner.
    19 Parts Sand
    2.5 Parts Lime
    1/3 Parts white cement
    No problem as of this date.

  3. #3
    Join Date
    Jan 2011
    Posts
    27

    Default Re: Mortor to field stone

    The origional part of the house only has sand.

    That mixture is exactly what I was looking for.

    Thanks

  4. #4
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,360

    Default Re: Mortor to field stone

    Check out the you tube videos on "parging" which is the name of the technique you'll be using for your field stone walls.

  5. #5
    Join Date
    Aug 2009
    Location
    Ladson,SC
    Posts
    192

    Default Re: Mortor to field stone

    Quote Originally Posted by HoustonRemodeler View Post
    Check out the you tube videos on "parging" which is the name of the technique you'll be using for your field stone walls.
    It is not the technique used it is the materials used that will effect the repairs.
    Improper materials will cause more failure over time.
    You must match the existing with the repair material.
    80% of My work comes from improper material used in the past.

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