31"/800mm in Eindhoven, the Netherlands: Design critique and build topic

[david s]

Well, two days spent well, but the vermicrete will be finished next Saturday... I didn't have enough 10:1 mix to fully close the dome. In the end that was ok, as for the final part I first had to figure the chimney out first anyway... Not sure if it's fully according to your design david s , please let me know. I wrapped the whole chimney and adapter part with two layers of chicken wire, and then filled it all in with 6:1 vermi/perlcrete. You also mentioned putting refractory castable, but I'm not really sure where I should put it? Do you only do a thin layer of vermicrete and then a thick layer of homebrew around it?

Please see the pictures.

I'm not 100% sure what you've done here. I thought you were creating a sleeve, that I detailed previously, so the flue pipe could be removable. It looks like you didn;t do this and have surrounded the flue pipe seating with the 5:1 vermicrete. Because as it appears you have a double flue pipe, If that is correct, you do not want any kind of homebrew or cement render reinforcing around the inner pipe. I would be better if you extend the vermicrete around the inner pipe up to the base of the outer pipe as the same diameter as the outer pipe. (as shown in attached sketch) Then you can then more safely render over the vermicrete and around the outer pipe, but I'd still be leaving a small gap (5mm or so that can be filled with high temp silicone because the outer pipe at that position gets pretty hot.