Heat radiation from external wall of Dome??

[fxpose]

Re: Heat radiation from external wall of Dome??

The rear of my dome is less than 50mm from my exterior house wall. I have no worries.

[GianniFocaccia]

Re: Heat radiation from external wall of Dome??

Another image reduction tool I just learned about is to use Microsoft Paint, which comes with just about every PC sold today. Open Paint, go into Image, Resize & Skew, and reduce your image to say, 25% of it's original size. Voila!

[Bert]

Re: Heat radiation from external wall of Dome??

Yes thanks Tmarsala.

[tmarsala]

Re: Heat radiation from external wall of Dome??

Bert-

Thank you! I reattached it on this post. Did you get it? Let me know if you would like more pictures as a guide. It really helped me to see what other people were doing as I built.

Tom

[Bert]

Re: Heat radiation from external wall of Dome??

Awesome Oven! Especially like your brick work at the front!

Bert

[Bert]

Re: Heat radiation from external wall of Dome??

Cheers!

See the attached link. Its a free picture resizer. This will allow you to easily reduce the size of your pictures.

Image resizing, do it with PIXresizer

Bert

[tmarsala]

Re: Heat radiation from external wall of Dome??

Trying again.

Tom

[tmarsala]

Re: Heat radiation from external wall of Dome??

Even better-let me see if I can attach it to this post-sorry, I'm a newbie on blogs.

Tom

[tmarsala]

Re: Heat radiation from external wall of Dome??

Bert-

goto the photo gallery and look on the "finished ovens" category. You'll see mine there. It will give you an idea of the sandstone I used.

Tom

[tmarsala]

Re: Heat radiation from external wall of Dome??

Bert-

Yes, they do change the color, but not for too long. I am trying to figure out how to attach one of my pictures, but they are all too large for this site. I'll keep trying.

Tom

[Bert]

Re: Heat radiation from external wall of Dome??

Thanks Tmarsala!

Yes, I think I may need to re think the sandstone option...maybe go for a composite material i.e. concrete blocks that?s look like sandstone. Alternatively, maybe render and seal the dome then use the sandstone so there is a impenetrable layer between the two. This may also be problematic as the sandstone will absorb quite a bit of moisture which will add considerably to the weight. The sealers I have generally used in the past change the colour of the surface which you are applying.

Bert

[tmarsala]

Re: Heat radiation from external wall of Dome??

Bert-

You're welcome! As a side note, my Finished render is less than a meter away from the neighbor's fence. If you are using the FB ceramic blanket as insulation you will have absolutely zero effective heat loss through your insulating barrier. I was worried about the same thing when I was building.

You will feel the warmth of steam escaping once you are finished and you begin to cure-but don't worry:after several good firings you will notice the outside of your oven being cooler and the oven getting up to temp much more quickly.

Also, I did not use sandstone as my render, but I used it as the deck area around the finished oven. It does absorb water easily and after that last week-long storm I had without covering the dome the sandstone took in quite a bit of water. You might want to consider using something else as render. But, if you do use it, buy a good water sealer and keep that baby sealed annually!

A lot to keep track of for sure! But it is quite a fun project and don't worry too much about the little things-it holds together much better than we think!

Keep in touch-let us know of your progress.

Sincerely,

Tom
42" Pompeii dome

[Bert]

Re: Heat radiation from external wall of Dome??

Thanks Tom, Les, John and Neil! All fantastic suggestions that i'll include in the design of the oven. Cheers Alex

[tmarsala]

Re: Heat radiation from external wall of Dome??

Having done the outside render with red common brick I can say that yes, the dome will support the render. Of course, you may want to add a "scratch coat" of waterproof mortar on the outside of your insulation layer (highly recommended) and then render on that. It gives that added support as well.

I believe that several elephant can stand on this dome and it would hold, although I don't want to try it in case I have to build another one! Once is enough!

Tom

[Les]

Re: Heat radiation from external wall of Dome??

That would be my second question, does the internal oven have the ability to support and additional layer of bricks or stone work?

Bert

Yes - if properly constructed, the dome will support and incredible amount of weight.