Oven Floor Insulation
I had four lying around and it just seemed the obvious choice.
Oven floor insulation. As expected the ceramic board is light and stops the conduction of heat. First you need to decide are you going to build the side wall on top of the oven floor or around it. The insulation method rigid insulation board made of ceramic fibers not household rigid insulation can offer appropriate protection from the heat of the fire when placed between the firebrick floor and the concrete base support slab. If you happen to touch the side front or top of the oven it could burn your skin.
Ceramafiber ceramic fiber insulation blanket by ceramafiber 3 4 x 24 x 30 feet for wood stoves pizza ovens kilns forges more 6 pound 2300 degrees f 58 sq feet 4 9 out of 5 stars 43 99 99 99 99 get it as soon as fri sep 25. Then i got to thinking would the slabs be able to handle the high temperatures. The hearth insulation is placed upon the oven foundation which is generally a reinforced concrete slab. Insulation is required under the oven hearth in addition to over the oven dome.
We often suggest skinning the dome with a 1 2 5 cm layer of vermiculite perlite and then insulating with a fb insulation blanket. Fb pizza oven insulation doesn t provide a rigidity to the structure so if you are looking for a mobile application you will probably want to use both fb insulation and a vermiculite perlite mix. Oven insulation is important for several reasons one of which is to keep the external frame within a suitable temperature range. One 2 5 cm thick layer of fb insulation board panel reduces the 800ºf 427 celsius cooking floor of a pizza oven to roughly 170ºf 77 celsius at equilibrium making it roughly twice as efficient as pure vermiculite board and even more efficient than castable vermiculite and portland cement mixes.
How to build a clay pizza oven oven floor. The only problem with the second option is you need to cut the bricks on the oven floor so they fit snug inside the walls. Perlite is a low density volcanic rock which is used for it s insulating properties in building and also gardening. You can get a 100 litre bag for less than 20 on amazon which is great value.
Continuing on my theme of simple and cheap i was originally going to use paving slabs. So let s start with the material for the oven floor. Without insulation the extreme heat produced by the oven would carry over to the frame leaving users vulnerable to skin burns.