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  1. #16
    Join Date
    Jun 2004
    Location
    Friday Harbor, San Juan Island, Washington
    Posts
    13,029

    Default Re: Floating a Mortar Bed on a Balcony

    Your plan is about 20 years behind the times. I would look at waterproofing applied OVER the mortar bed, if you use mortar at all, which many here would not.
    Bailer Hill Construction, Inc. - Friday Harbor, WA
    Website - Facebook

  2. #17
    Join Date
    Jun 2010
    Location
    Palo Alto CA
    Posts
    37

    Default Re: Floating a Mortar Bed on a Balcony

    Quote Originally Posted by tjbnwi View Post
    Again just something I have noticed, I know I would not leave an exposed edge.

    Tom
    Tom,
    Certainly just exposed mortar would not look good. A better approach would be to tile this surface also. I will have to think about this, I would have to have the mortar bed stop short of the edge as I wouldn't want the edge tile to stick out over the edge of the balcony.

  3. #18
    Join Date
    Jun 2004
    Location
    Los Angeles, CA
    Posts
    4,264

    Default Re: Floating a Mortar Bed on a Balcony

    The exposed mortar would be a problem as it would suck in moisture and that would expand and pop tiles. After several cycles the lime would leach out and it would become crumbly. A really bad Idea.

  4. #19
    Join Date
    Jun 2004
    Location
    NoVA
    Posts
    1,276

    Default Re: Floating a Mortar Bed on a Balcony

    Quote Originally Posted by Kgphoto View Post
    The exposed mortar would be a problem as it would suck in moisture and that would expand and pop tiles. After several cycles the lime would leach out and it would become crumbly. A really bad Idea.
    KG, there shouldn't be any lime in the deck mud in the first place.

  5. #20
    Join Date
    Jun 2004
    Location
    NoVA
    Posts
    1,276

    Default Re: Floating a Mortar Bed on a Balcony

    Pesto, if you want to spend the money, the Laticrete Plaza and Deck System is a great way to do an exterior installation like this.

  6. #21
    Join Date
    Jun 2004
    Location
    Los Angeles, CA
    Posts
    4,264

    Default Re: Floating a Mortar Bed on a Balcony

    Quote Originally Posted by Robert Z View Post
    KG, there shouldn't be any lime in the deck mud in the first place.
    You are correct. I used the wrong terminology. It is the salts that leach out, called efflorescence.

  7. #22
    Join Date
    Jul 2004
    Location
    Pacific Palisades,CA
    Posts
    740

    Default Re: Floating a Mortar Bed on a Balcony

    Congratulations, KG just hit 4,000 posts.
    .
    ....Bob Lavery
    "One should not make more assumptions than the minimum needed."
    William of Occam quote

  8. #23
    Join Date
    Jun 2004
    Location
    NoVA
    Posts
    1,276

    Default Re: Floating a Mortar Bed on a Balcony

    Quote Originally Posted by PaliBob View Post
    Congratulations, KG just hit 4,000 posts.
    .
    And 3,845 of them were arguing with the monkeys in the drywall forum. :)

  9. #24
    Join Date
    Aug 2006
    Posts
    15

    Default Re: Floating a Mortar Bed on a Balcony

    STOP! Before tiling or waterproofing a deck, do a lot more research. The edge detail is one of many important details that if not done right, will kill the deck dead in 5-8 years...

    Mer-Krete has a detail at their www.merkrete.com site that shows a double flashed edge with a wood stop strip to hold the mortar bed at the edge and gives you a nailer to for the secondary flashing piece.

    Check out www.deckexpert.com for more information on waterproofing decks, I have put up lots and lots of free info for you to utilize!

    Make sure to read Duradek's president/ownerJohn Oglivie's article on tiling decks...

  10. #25
    Join Date
    Jun 2004
    Location
    Los Angeles, CA
    Posts
    4,264

    Default Re: Floating a Mortar Bed on a Balcony

    Hey Thanks Guys. I didn't notice the milestone.

  11. #26
    Join Date
    Jun 2010
    Location
    Palo Alto CA
    Posts
    37

    Default Re: Floating a Mortar Bed on a Balcony

    Quote Originally Posted by pestocat View Post
    I will be floating a mortar bed on a balcony 4 ft. wide by 11 ft. long. There is nothing to confine the outside edges of the bed. How is this non confinement handled. Do I float to the edge and use a steel trowel to make a sharp cut just short of the edge and just make sure I have it compacted well. Maybe use my hand to confine the mortar at the edge. A little excess will fall off the edge. Is this the way it is done? After reading Michael Byrne's article "Tiling an Outdoor Countertop", it seems I could add temporary edging to the bacony facia that would be at the finish height of the mortar bed. Seems like a solution.

    Project complete except for a little facia detail. Here is a photo album for the details. http://forums.jlconline.com/forums/album.php?albumid=38
    Thank you for all the discussion and support.

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