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Mosaic finish - Forno Bravo Forum: The Wood-Fired Oven Community

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Mosaic finish

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  • Mosaic finish

    Nearing completion of my WFO. Up to day 5 of curing. Once I have insulated etc I am thinking about doing a mosaic finish on the outside (igloo style).

    Can anyone offer advice on how hard it is to do? and what the process is.

    Thanks
    Jase

  • #2
    Re: Mosaic finish

    Frances is BY FAR the resident expert on mosaic. Need to check out her build, she is truly an artist.

    RT

    Comment


    • #3
      Re: Mosaic finish

      Hi Jase,
      mosaics? Not a problem unless you want to tile a picture or pattern like Frances in Switzerland.
      Check out her Pompeii, rather spectacular at:

      http://www.fornobravo.com/forum/9/po...s-2991-19.html

      Permalink #182 and 184 show it in detail.
      If you just want to plain ceramic tile it, no worries apart from securing the smaller tiles.
      I have been trying to find suitable mosaic tiles for the completion of my oven but can only find swimming pool coloured tiles and don't want a green, blue, grey or white oven and not prepared to do as Frances. I think that I will let garden grow over mine and only access the front door, after all I want to cook in it rather than labour over it.
      I ceramic tiled my concrete in ground swimming pool some 18 years ago with close to 90 sq metres of 2" mid to dark blue tiles and not a crack nor a single loose tile so far. Just start at the bottom with probably 2 or 3 rows and once it reduces in circumference, then only lay a single row at a time or start cutting heaps of tiles to fit.

      Neill
      Prevention is better than cure, - do it right the first time!

      The more I learn, the more I realise how little I know


      Neill’s Pompeiii #1
      http://www.fornobravo.com/forum/f8/n...-1-a-2005.html
      Neill’s kitchen underway
      http://www.fornobravo.com/forum/f35/...rway-4591.html

      Comment


      • #4
        Re: Mosaic finish

        Originally posted by RTflorida View Post
        Frances is BY FAR the resident expert on mosaic. Need to check out her build, she is truly an artist.

        RT

        I dunno about expert RT, yours has stood the test of time - I liked it so much that it inspired me to do mine.


        Jase, I think this is quite a good book to give you some basics on outdoor mosaics:

        Amazon.co.uk: Pattern and Mosaic in the Garden (Hamlyn): Clare Matthews: Books

        Its not hard to do, and you can make it as simple or as complex as you like. For the materials a good rule of thumb is: if it will work for a swimming pool, it will work for an outdoor mosaic - the grout and adhensive mortar are the same as used for bathrooms or swimming pools.
        "Building a Brick oven is the most fun anyone can have by themselves." (Terry Pratchett... slightly amended)

        http://www.fornobravo.com/forum/f8/p...pics-2610.html
        http://www.fornobravo.com/forum/f9/p...nues-2991.html

        Comment


        • #5
          Re: Mosaic finish

          Thanks for the help everybody, in particular Neill, you have given me buckets of advice over the past months and my oven seems to be drawing very well and I am getting some decent fires in it now. First pizza scheduled for this weekend. I live in Ballarat (an hour west of Melbourne) and it has been very dry the past week, perfect curing weather.

          Frances your oven is stunning & RT your oven is beautifull, an inpiration to us all. I hope you both never have to leave home.

          I am presuming you apply the mosaic tiles oven the final render not the vermiculite concrete insulation?

          Cheers
          Jase

          Comment


          • #6
            Re: Mosaic finish

            Jase, after the vermiculite I applied a shell of about 1/2" to get everything smooth and shaped the way I wanted. I used Type N mortar (pretty sticky stuff). I used the same Type N as my mortar/grout for the mosaic tiles (I had plenty left, no sense is buying something different). Other than a reoccurring hairline crack around my chimney pipe...I've had no issues in the 18 months since I completed the mosaic work.
            I will say this - it is slow and tedious work.
            Also, buy the best tile nippers you can find if you are doing any kind of pattern or using random shape pieces....A LOT of cut to fit, at least in my case (I didn't want any wide grout lines).

            RT

            Comment


            • #7
              Re: Mosaic finish

              Jase,
              thanks for you kind comments, it's nice to get information that you have faith in, as it has been proven to work.
              Again, a little advice on your tiling.
              Mix up a plaster render, Plaster sand and portland cement 3:1 or there abouts and apply at least 1/2" thick. This will provide a waterproof layer and a great base for tiling. You could tile directly on the vermiculite (it is solid enough to take the tiles safely), but then you will rely soly on the tiles and grout for your waterproofing.
              Does your oven get hot on the top of your dome when at 500˚C? If it does, then I would add at least another inch of vermiculite cement.
              To get the surface nice and smooth and curvey, I would use a strip of nylon or flexible plastic, maybe 2" x 18 to 20" long. This will flex and bend nicely in your hands to get a nice shape but don't get it nice and smooth, rather keep it slightly textured (even use a stiff bristled yard brush) to improve the ceramic tile adhesive bonding surface.

              Neill
              Prevention is better than cure, - do it right the first time!

              The more I learn, the more I realise how little I know


              Neill’s Pompeiii #1
              http://www.fornobravo.com/forum/f8/n...-1-a-2005.html
              Neill’s kitchen underway
              http://www.fornobravo.com/forum/f35/...rway-4591.html

              Comment


              • #8
                Re: Mosaic finish

                Thanks again Neill. Really appreciate your advice.

                If I dont do mosaic on the outside what would you recommend as an external render? If I dont use mosaic I would like to paint it a terracotta type colour with maybe a lime wash in it to give it a rustic look.

                Thanks
                Jase

                Comment


                • #9
                  Re: Mosaic finish

                  Jase,
                  when you mix your paster render mix, you can incorporate some oxide colouring available at building supply stores, sand and metal merchants and even Bunnings. You might like to try a terracotta colour (if it is available), or play with an orange and a dash of black, mix it in and whallah, your finished colour.
                  How you finish it is up to your imagination, bag wash, steel or wood trowel, brush finish etc etc. You can even carve some shapes into wood (or make them other ways) and press them into your soft render, leaving an impression.
                  No need to BUT, if you wish, you can always paint it with a whole host of paints and finishes.
                  The options are limitless!

                  Neill
                  Prevention is better than cure, - do it right the first time!

                  The more I learn, the more I realise how little I know


                  Neill’s Pompeiii #1
                  http://www.fornobravo.com/forum/f8/n...-1-a-2005.html
                  Neill’s kitchen underway
                  http://www.fornobravo.com/forum/f35/...rway-4591.html

                  Comment


                  • #10
                    Re: Mosaic finish

                    Neill,
                    Just wanted to get your confirmation that your plaster recipe as above is waterproof?
                    Sounds like a fairly cheap and easy method to finish off the dome if so.
                    cheers,
                    Glenn

                    Comment


                    • #11
                      Re: Mosaic finish

                      Hi Glenn,
                      I just went and checked on the bag of Portland (as all your formulas are printed on the bags)
                      For Structural concrete, 1:2:3 (Cement:Sand:Aggregate)
                      For paving concrete 1:2.5:3.5
                      Render 1:4 * I use it 1:3 which makes it a little harder ,stronger and more water resistant. This is the receipe that they used for cement lining of rusted gavanised water tanks year ago. You can add the coloured oxide to taste when mixing which prevents you having to paint the finished surface but you will need around .5 to 1 kg per large wheelbarrow mix of render. Go by the recommendation on the label of the oxide.
                      Mortar 1:6 + 1 part hydrated lime.

                      Check on your next bag of cement.

                      Cheers.

                      Neill
                      Prevention is better than cure, - do it right the first time!

                      The more I learn, the more I realise how little I know


                      Neill’s Pompeiii #1
                      http://www.fornobravo.com/forum/f8/n...-1-a-2005.html
                      Neill’s kitchen underway
                      http://www.fornobravo.com/forum/f35/...rway-4591.html

                      Comment


                      • #12
                        Re: Mosaic finish

                        Mixing coloured oxides with grey portland cement results in a rather dull greyish colour. I've found it better to do a coloured layer over the render, but use white cement, sand and oxide. This results in a much better colour.
                        Kindled with zeal and fired with passion.

                        Comment

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