Post by fatfreddyscat on Sept 1, 2020 22:20:00 GMT
Finally, after 4 years of dithering, delaying and distractions I have finally started on my first WFO...!! This forum has certainly helped me gain the confidence and knowledge to progress so thank you to all the other newbie questions and answers that have gone before me. 
The base is an over engineered concrete slab, atop sits 50mm CalSi board and then fire bricks bedded down with fire clay. The walls will be built on top of the floor bricks. So far so good, however I can now relate to Nebuchadnezzar as I am worried that I will end up with my oven being built, literally, on feet of clay..! I took the decision to bed the (wet) bricks down with neat fire clay as a paste, no sand or cement added. Was this a school boy error...??
Any thoughts or red flags I need to be concerned about? I couldn't just lay the bricks direct on the board as they are from two different batches with a 2/3 mm difference in height which required the clay to level them out. In the foreground of the photo is a test piece made with some FB off cuts and I will see how well it cures/adheres over the next few days. I will be making a 50mm Perlite cement 'skirt' to encase the outside of the floor which I hope will act in two ways, firstly to reinforce against any possible lateral movement of the floor bricks as weight increases with the walls and secondly to act as a intermediate weather proofing layer by covering the edges of the CalSi board until I can complete the build with an external house brick dome on top of the insulation layer.
The base is an over engineered concrete slab, atop sits 50mm CalSi board and then fire bricks bedded down with fire clay. The walls will be built on top of the floor bricks. So far so good, however I can now relate to Nebuchadnezzar as I am worried that I will end up with my oven being built, literally, on feet of clay..! I took the decision to bed the (wet) bricks down with neat fire clay as a paste, no sand or cement added. Was this a school boy error...??
Any thoughts or red flags I need to be concerned about? I couldn't just lay the bricks direct on the board as they are from two different batches with a 2/3 mm difference in height which required the clay to level them out. In the foreground of the photo is a test piece made with some FB off cuts and I will see how well it cures/adheres over the next few days. I will be making a 50mm Perlite cement 'skirt' to encase the outside of the floor which I hope will act in two ways, firstly to reinforce against any possible lateral movement of the floor bricks as weight increases with the walls and secondly to act as a intermediate weather proofing layer by covering the edges of the CalSi board until I can complete the build with an external house brick dome on top of the insulation layer.