Continuing on my theme of simple and cheap I was originally going to use paving slabs. How to build a Clay Pizza Oven – Oven Floor. But of the variety of materials available — stone, cast iron and even steel — which one is the best pick for you?Picking the right pizza stone depends on your personal needs and kitchen habits. This base will help to carry the weight of the oven, raise it to an operational cooking level and the thick floor will help to insulate the oven. In every pizza lover’s quest to approximate a fiery-hot brick pizza oven at home, a pizza stone is first on the list of necessary equipment. Base layer The one thing I learned from my old clay oven is that insulation underneath the firing base is critical if you want the oven to get hot quickly and stay hot for a long time. The slab should contain NO metal re-enforcement, this is critical because metal will expand and contract at a different rate to the concrete and could cause the slab to fail and collapse. Then I got to thinking, would the slabs be able to handle the high temperatures. Most of the suppliers like www.kilnlinings.co.uk recommend Calcium Silicate boards, but these are quite expensive. Important note: We know ceramics, not clay pizza oven building: it is important that you do your research on what you want to build. Your cooking floor can be made from either individual firebricks, set in an offset (graphic 1) or herringbone pattern, where the oven walls rest directly on the cooking surface, or from a round refractory floor provided by Forno Bravo.Either works. The advantage of the firebrick floor is that it is made from materials you can purchase locally. I had four lying around and it just seemed the obvious choice. Overview. So let’s start with the material for the oven floor. We know what oven builders tell us works for them and we can share that info with you, but it is not what our products are intended for so we can make no guess if …