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  1. #1
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    Default Stone Veneer on Concrete Block

    Curious to hear some opinions on this one. I see stone veneer on bare concrete block down here. The mortar joints are not filled. You can see the bare/raw/unpainted block when you look through the mortar joints. I would think this setup would be vulnerable to moisture intrusion/absorbtion of the block, particularly during heavy rains and wind driven rains when it doesn't have a chance to evaporate back out of the block, once absorbed. Thoughts/Opinions? Anyone have any expertise on these types of stone veneer?
    See photo.

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  2. #2
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    Default Re: Stone Veneer on Concrete Block

    Matthew,

    Dependent on The Manufacturer this Dry Stack on Masonry Wall ( with the Proper Water Resistant Coating ) is allowed.
    .

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    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
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  3. #3
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    Default Re: Stone Veneer on Concrete Block

    B. Water-Resistive Barrier
    Depending on local building code requirements, barrier shall meet the requirements of ICC Acceptance Criteria 38 “Acceptance Criteria for Water Resistive Barriers.”
    Note: Water-resistive barrier must be used on all exterior and interior mortar applications. Waterresistive barrier is not required for application over masonry or concrete.

    B. Joint Width
    In order to obtain the most natural look, joints should be as narrow as possible. The average should not exceed 12" in width. An attractive look can also be achieved by fitting stones tightly together if desired. If using tight fit/drystack method, it is important to make sure scratch coat/backing has been covered completely by the setting bed of mortar. This will conceal the scratch coat/backing and prevent pockets from forming behind stones that could trap water.

    Masonry or Concrete:
    In sequence: (1) mortar applied directly to untreated, unpainted masonry, concrete or stucco, (2) Cultured Stone ® manufactured stone veneer, (3) mortar joint.







    Last edited by Jerry Peck; 11-17-2009 at 09:08 PM. Reason: removed extra blank lines - not sure where they came from
    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
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  4. #4
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    Default Re: Stone Veneer on Concrete Block

    Quote Originally Posted by Billy Stephens View Post
    Matthew,

    Dependent on The Manufacturer this Dry Stack on Masonry Wall ( with the Proper Water Resistant Coating ) is allowed.
    .
    Quote Originally Posted by Jerry Peck View Post
    B. Water-Resistive Barrier
    Depending on local building code requirements, barrier shall meet the requirements of ICC Acceptance Criteria 38 “Acceptance Criteria for Water Resistive Barriers.”
    Note: Water-resistive barrier must be used on all exterior and interior mortar applications. Waterresistive barrier is not required for application over masonry or concrete.


    B. Joint Width
    In order to obtain the most natural look, joints should be as narrow as possible. The average should not exceed
    12" in


    width. An attractive look can also be achieved by fitting stones tightly together if desired. If using tight fit/drystack method, it is important to make sure scratch coat/backing has been covered completely by the setting bed of mortar. This will conceal the scratch coat/backing and prevent pockets from forming behind stones that could trap water.

    Masonry or Concrete:
    In sequence: (1) mortar applied directly to untreated, unpainted masonry, concrete or stucco, (2) Cultured Stone
    ® manufactured stone veneer, (3) mortar joint.


    .
    Check,

    Water Resistant Barrier is Not Required over Masonry or Concrete.
    .

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  5. #5
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    Default Re: Stone Veneer on Concrete Block

    The stones actually looked like they were "back buttered" instead of the mortar being applied to the wall itself like the instructions state. It appeared that it was concrete block in the mortar joints instead of a mortar bed. The instructions that state:

    "In sequence: (1) mortar applied directly to untreated, unpainted masonry, concrete or stucco, (2) Cultured Stone
    ® manufactured stone veneer, (3) mortar joint."

    fall under "Typical Applications" and not "Required".

    Would a trip or call to or a letter from a manufacturers rep be warranted here?


  6. #6
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    Default Re: Stone Veneer on Concrete Block

    Quote Originally Posted by Matthew Barnicle View Post

    Would a trip or call to or a letter from a manufacturers rep be warranted here?
    .
    Find out Who Manufactured this Stone and get their Installation Instructions.
    * posted pdf was a Generic Sample .
    .

    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

  7. #7
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    Default Re: Stone Veneer on Concrete Block

    Quote Originally Posted by Billy Stephens View Post
    Water Resistant Barrier is Not Required over Masonry or Concrete.
    I was addressing this:
    Quote Originally Posted by Matthew Barnicle View Post
    You can see the bare/raw/unpainted block when you look through the mortar joints.
    With this:



    Quote Originally Posted by Jerry Peck View Post
    B. Joint Width
    If using tight fit/drystack method, it is important to make sure scratch coat/backing has been covered completely by the setting bed of mortar. This will conceal the scratch coat/backing and prevent pockets from forming behind stones that could trap water.
    "make sure scratch coat/backing has been covered completely by the setting bed of mortar"

    Which means you would not be able to see "the bare/raw/unpainted block when you look through the mortar joints."

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  8. #8
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    Default Re: Stone Veneer on Concrete Block

    "make sure scratch coat/backing has been covered completely by the setting bed of mortar"

    In this case, the "backing" is the concrete block... got it. Thanks.


  9. #9
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    Default Re: Stone Veneer on Concrete Block

    BTW, have the 2009 MVMA guidelines:

    http://www.masonryveneer.org/pdf/mvma030909.pdf

    been mentioned at this site?

    Also, I found this interesting:

    http://www.masonryveneer.org/pdf/MVMA_Tech_Bulletin.pdf

    Last edited by Michael Thomas; 11-18-2009 at 05:48 AM.
    Michael Thomas
    Paragon Property Services Inc., Chicago IL
    http://paragoninspects.com

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