Aussie build - with a very different base

[marksidz]

http://pigpizza.blogspot.com/

[brickie in oz]

Originally Posted by marksidz

left over concrete retaining wall sleepers as the top base -

Why not pour a concrete slab, Im not sure if those retaining wall sleepers will be strong enough laid flat?

Originally Posted by marksidz

Running 28mm furring channel at 200mm centres. I will then be using an industrial insulation sheet that is made from high-density glass wool and is 28mm thick and will be cut to fit between the furring channel.

The furring channel will act as a wick and draw the heat out of the oven base, glass woll wont be anywhere as good as a calcium silicate board.

[marksidz]

http://pigpizza.blogspot.com/

[marksidz]

http://pigpizza.blogspot.com/

[Karangi Dude]

Hi Mark,
IMO I think you would be better to just pour a slab about 100 to 125mm then put your insulation on top.
The guy you mentioned that used two layers of sleepers how did he tie them together and how did he secure the blocks from moving?
If you pour a slab you can corefill the blocks at the same time which will tie the whole thing together and will give you a solid and level platform to build your oven on.
Mark these things are probably a bit over engineered, but keep it simple follow the tried and tested ways and get cooking thats the best part.
Good Luck

[marksidz]

http://pigpizza.blogspot.com/

[marksidz]

http://pigpizza.blogspot.com/

[cobblerdave]

Hi
That looks like a hard days work but....Smart move to go back to the original soil and not trust your foundations on that garden soil.
Regards Dave

[Lake lover]

Your dog looks like you dug up a bone in hiding. !!

Is that an enclosed space ? hard to tell from the pics.

I'm a newbie so thanks for posting.

[marksidz]

http://pigpizza.blogspot.com/