My build, New Zealand.

[UtahBeehiver]

Looks great and access to the oven from the new door will make life easier.

[david s]

Looking very nice Mark. You will need a double flue for the roof penetration. I did one years ago (sorry pics lost from a computer crash), where I just did the double flue from around 200mmm below the roof penetration point to the top of the flue where you need a cowl with a double flue seating, as well as an orange Dektite seal between the roof and outer pipe. This way you don't need the added expense of a full length outer pipe.

[MarkJerling]

Looking very nice Mark. You will need a double flue for the roof penetration. I did one years ago (sorry pics lost from a computer crash), where I just did the double flue from around 200mmm below the roof penetration point to the top of the flue where you need a cowl with a double flue seating, as well as an orange Dektite seal between the roof and outer pipe. This way you don't need the added expense of a full length outer pipe.

Hi David

I'm not roofing the part over the oven, for now! I may roof it later in which case I need to do a triple flue in terms of our building code. In the mean time, I need have 3x pipe diameters clearance between the flue and anything combustible, so the big hole works well.

[david s]

Here is an alternative method, that I personally prefer, because it does not require a double or triple flue that a roof penetration does. The oven mouth is well under cover, but its bum is out in the weather. As well as staying well away from flammable roof trusses, it also eliminates corrosive emissions falling on the roof around the penetration of steel roofing material. My sister had problems with that from a slow combustion stove, which required an expensive repair to the roof.