Its maximum application should be no more than about 1/4" (6mm) as thicknesses above this are prone to crack and shrink over time. Mortar is required at almost every step in the building of a brick based pizza oven. Once fully mixed and the ingredients for a solid colour, add a small amount of water whilst mixing. To prepare the mortar first mix all the components properly to a uniform state without the use of water. The hot surface should be constructed entirely out of fire bricks which are butted together without mortar in between. Before the oven is fully fired for the first time it is important that the concrete and mortar be completely cured and dry. Too much water should be avoided such that the mortar maintains its shape when piled, and does not flow completely. I want to build a wood fired brick pizza oven, I have been researching on internet I need heat resistant fire bricks, heat resistant mortar larger quantity than a tube, some sort of insulation blanket that can be mortared over. Clay bricks can withstand the heat from a pizza oven, and concrete bricks can’t. Continue adding water at regular intervals until a paste as thick as crunchy peanut butter is formed. Again, temperature is okay but you don’t know how many times you have to bake pizza. The big spaces among bricks should not be filled with refractory mortar. When flat fire brick joints are difficult or impossible due to curves, refractory mortar should be used. Re: Inside Dome Repair Dutch It really looks like an inferior mortar mix was used. Not really affecting the food but obviously would not be fun to have as a pizza ingredient. So we need to make a heat resistant mortar mix. Internal walls, floor and arches made from firebricks inside a To minimise the potential for issues it is suggested that multiple small fires be built in the oven to gradually dry and increase the temperature over time. A thin layer of the mortar is used inside the dome only to strengthen the structure, and not to fill gaps. ", "Made are tools, and born are hands"--William Blake, 1757-1827, http://www.fornobravo.com/forum/f8/p...pics-2610.html, http://www.fornobravo.com/forum/f9/p...nues-2991.html, If this is your first visit, be sure to Vitcas® Outdoor Oven Cement is a pre-mixed dry refractory mortar suitable for jointing fire bricks, jointing Vitcas® Sectional outdoor ovens and for general purpose exterior use with barbecues, pizza and bread ovens, firepits and any other high temperature application. This is the mortar that you will use to lay the bricks of your pizza oven where excessive heat resistance is not required. Mortar is required at almost every step in the building of a brick based pizza oven. This results in the mortar not being exposed to the high heat of the internal oven. Additionally the area may be periodically watered over the following 24 hours. If water is drawn from the mortar quickly due to evaporation, the curing process will be hindered and the resulting mortar may be brittle. ), keep a gallery of my projects, and curate information related to building techniques, FAQS, pizza and other topics in our new discussion forum. Normal mortar will expand and crack very quickly when exposed to the temperatures of a woodfiring pizza oven. It needs to be the consistency of oatmeal or, in the words of This Old House's Tom Silva, "peanut buttah." Application of mortar to bricks is usually done via the use of a brick laying trowel. :). A hand sized ball of the mortar should hold its shape. If this temperature is not raised in pizza oven, your pizza will not be baked properly. My name is Matt Sevigny, and this is where I blog about wood-fired oven related topics (DIY, building, firing, pizza, recipes, etc. It shouldn't be used to fill holes or empty spaces in the oven. Builder’s mortar or refractory mortar coupled with Portland cement based concrete or refractory concrete is used extensively to build high quality pizza ovens. Non-water soluble this is a hydraulic set mortar which does not require heat to cure. The area between wall bricks and floor does not require mortar. Refractory mortar may not be applied for plugging holes or big spaces or gaps between firebricks. Mortar should not be used in areas where flat joins are possible between the fire bricks such as in the hearth. My hardscaper claimed he knew what he was doing and now I am not so sure. Stonemason with over 30 years experience available for brick and stone repair fireplaces pizza ovens and genral repair work ... 55 # pail of fire brick mortar. 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