After some feedback on my build thus far

[Sixto]

would not recommend using fire clay in the render mix because it absorbs moisture, only use it as part of your home brew mortar or refractory casting mix to make it more workable.

[Pizzarotic]

120mm concrete slab on which i have 2 layers of 35 micron aluminium foil then 60mm ceramic blanket and then the fire brick floor.

Hi Chris, couple of observations from your post.
Ceramic blanket is not suitable for under floor as it will compress and loose a lot of its effectiveness. (perhaps you meant "board")
With the foil under the insulation, this could help trap water from above if the oven is exposed to weather so make an effort to waterproof the dome and also prevent water entry onto the oven floor.

Should I start curing fires after 7 days or should I render first. From what I have read the consensus seams to be cure before render,

The perlite will take some time to dry out depending on your temperature/humidity so I would suggest you do at least some curing before rendering. 7 days after casting the oven is too soon to start curing Portland cement mix in my opinion but refractory cement should be fine.

Has anyone tried to cure using a large lpg burner ?

Yes, it's a great way to do the initial drying. Some people worry about dying in a fireball explosion so if you are not familiar with basic propane safety then charcoal next best.

Also the render mix I'm planning to use is 3:1:1:1/4 sand cement lime and fire clay with Sica 150 fibre mesh. Mixed with the water + bondcreat sol. Is this ok or is there a better recipe?

That is more of a refractory type mix. A normal render mix will be fine or ideally purchase a waterproof acrylic render.

[ChrisNazareth]

Hi All

Hi All
Im Chris from Australia and this is my first post
I probably should have reached out to the group before I started but anyway better late than never.
My build thus far.
120mm concrete slab on which i have 2 layers of 35 micron aluminium foil then 60mm ceramic blanket and then the fire brick floor.
the dome and arch are 65 mm refractory concrete over which I have 65 mm ceramic blanket then 2 layers of the same foil over which I have added 200 litres of perlite ( 5:1:1/4 perlite cement fire clay) I mixed it with a solution of water and 5% bondcrete.
It has now been sitting under cling wrap and plastic for 48 hours.
Should I start curing fires after 7 days or should I render first.
From what I have read the consensus seams to be cure before render, however I’m not sure if that only applies to brick ovens.
Has anyone tried to cure using a large lpg burner ?
Also the render mix I’m planning to use is 3:1:1:1/4 sand cement lime and fire clay with Sica 150 fibre mesh. Mixed with the water + bondcreat sol. Is this ok or is there a better recipe?
looking for any feedback on what I should be doing differently or what I should have done differently.
Thanks in advance and looking forward to hearing your feedback
Cheers
Chris
Dalmeny NSW Australia