We Built the Tesla of Backyard Pizza Ovens In 4 Days

[@tracyvernon9467]

Brilliant job!, takes a lot of time effort and patience to create something like that. And my mouth is watering....

[@slivace]

Can you write the ratio of straw, sand, clay and what else is needed to put. Thanks.

[@HardcoreSustainable]

The ratio of clay to sand really depends on the clay you are using. You should do some test batches with different ratios, but about 2-3 sand to 1 clay is normal. The straw can be heavy or minimal depending on what you are going for. Putting a lot in won't hurt and will add more structure. Think of straw as rebar, sand as gravel, and clay as cement---to compare it to what's in concrete. For the inner dome of this oven, we didn't use any straw because it would just burn up from the heat. I'd recommend watching my longer video about this on my channel. kzbin.info/www/bejne/an7PpWyjit9gnZIsi=fw4DYwxCwb2GtJFR

[@64maruca]

Turned out beautifully! Now I have a hankering for pizza lol

[@13thravenpurple94]

Great video Thank you

[@g1ateam]

Good work congrats...

[@davemeyers9425]

That is a tremendous effort and a tremendous amount of insulation! I bet with all that K-O-wool your oven keeps it's heat for a long time! Thanks for sharing. :0)

[@HardcoreSustainable]

yes it does stay hot for much longer.

[@Kory-h9x]

I have seem a clay oven being built here in Brasil, it was built only with clay, strow and sand and it worked out good. So, the difference between the one I saw here and your is the visual, your is more Beautiful!

[@candyahbahtyisrael]

I am a new subscriber to your KZbin channel. I am not a KZbin content creator just an old-fashioned home gardener gardening differently due to my disabilities. I do support the KZbin garden community because it's not all about gardening but it covers all topics, the good, the bad, and the ugly. All individuals are welcome regardless of nationality, race, religion, gender, disability, or social and economic background. I can learn something new each day from anyone whether in the garden community or not. Shalom!

[@HardcoreSustainable]

Good luck to you. Yes KZbin really is for everyone.

[@merlijnbaron570]

Great work! What kind of insulation did you use?

[@HardcoreSustainable]

It's a ceramic wool and perlite.

[@Lem0nm00n]

What a great investment in joy for this community.

[@waterisgold]

Beautiful ❤️

[@donnatrimble7439]

I love making & working cob

[@HardcoreSustainable]

Yes it is fun to work with.

[@lynnf62]

Thank you so much for sharing this amazing video....well done! This is a bucket list project for me...one day! I do have 2 questions...At the 7 month mark there are some cracks, would those need to be "patched"? Would this oven be ok without a roof over head? Thanks again, I really enjoyed watching the process.

[@HardcoreSustainable]

ARe there cracks inside or outside? I would not build this without some protection from the weather over it. The earthen plaster will just wash away otherwise.

[@brianleary137]

A couple of questions 1. Do need to have the cobb oven under cover or will it stand up to the elements by itself? 2. Do have to add cement to the final coat to ensure better weather resistance?

[@HardcoreSustainable]

it's a good idea to have the oven under a roof to protect from the rain. You can protect the earthen plaster that covers the exterior of the oven with linseed oil. It will harden and repel water. You would do multiple coats of linseed oil mixed with a citrus solvent or turpentine. But i'd still have a cover over it to block most of the direct weather on the oven. On this oven, I just renewed the surface on the outside with a mixture of clay and lime. That will hopefully keep down the mildew, which can grow on the surface in humid climates. I wouldn't add cement to the plaster. That will not do anything and will if anything prevent the oven breathing, so will prevent the passage of moisture out of the oven.

[@brianleary137]

@@HardcoreSustainable Thank you, for the reply I will keep that in mind moving forward.

[@timhensley3695]

I'd love to build one of these ❤

[@jernashapaul4181]

Id love to make this but dont have fire brick where i live. What else can i use?

[@HardcoreSustainable]

YOu don't have to use fire brick. People just make these with cob floors as well. The reason people use fire brick is because it will hold up to the extreme temperatures of the fires. Other bricks or rocks have the potential to break and crack under extreme temperatures, as does cob. Cob will wear a lot faster than bricks or rocks. It's more likely they'll break if they have moisture in them, as well. You could try cob or flat rocks or regular bricks. Just dry the oven out a lot before lighting a fire.

[@kathysvagdis5130]

I love this. Do you have plans/material list?

[@HardcoreSustainable]

I don't really. I was thinking of making a webinar out of it.

[@לאנגענו]

So if the chimeny is in the front part of the oven the main chamber doesnt lose heat but the smoke will go out of the chomney and not the main opening?

[@HardcoreSustainable]

Yes, that's correct. The chimney pretty much just prevents the smoke from going out the door.

[@niklascarlsson727]

What is that white stuff on top of the bottles? Perlite? And why the layer of bottles? Does that insulate significantly compared to just bricks/stone or more cob?

[@HardcoreSustainable]

That is perlite. The perlite and the bottles provide insulation.

[@Michael_McMillan]

The tesla of ovens? So it catches on fire and then crashes into a pedestrian?

[@HardcoreSustainable]

hahaha, I was worried that people might think that. I would have said Cadillac (this is how Mark the builder of the oven described it), but those are horrible huge gas guzzlers and I don't think they're the standard for a good car anymore. Tesla's are kind of the cutting edge of car tech and get much better mileage, even if the self-driving tech has a ways to go and really is unnecessary. The oven does catch fire though, or at least holds fire. Got a better non-car metaphor?

[@Michael_McMillan]

@@HardcoreSustainable The bicycle of pizza ovens :D

[@mateicristi2524]

I opened the video to like your comment.

[@JeanCaschetto]

le four il est tout fissuré ??

[@HardcoreSustainable]

It has some cracks. That's kind of expected with these materials and high temps. Each type of clay will react differently to high temps, so you have to experiment.

[@georgecarlin2656]

Looks like a 10/10 product. I imagine the only limitation is it can't be moved, though prolly barely anyone ever needs to.

[@HardcoreSustainable]

The great thing about something like this is it draws people to it.

[@syamthupurani8355]

Planning to build one exactly like this Really enjoyed the Video Was tired of seeing all those brick ovens and wanted a mud one Just wanted to know the lifespan of the oven Thanks for the effort

[@HardcoreSustainable]

Well, tbh this one has had some issues with the dome. It's not normal, but there was some spalling on the dome since it was built. I think it was from the way the dome layer was being manipulated after being put on. I think it was being pushed around too much and was cracking through while still wet. That led to it drying with cracks. Since that layer didn't have straw, it didn't have anything to tie it together. I wonder if it would be possible to put something like metal wire in the mixture to serve the role of straw. The metal wouldn't burn up though. Other than that I think this kind of oven could last a long time. People have been making these kind of cob ovens forever. And a simpler design would be easier to rebuild if needed after years of use. Natural materials can easily be reused.

[@syamthupurani8355]

Asked cuz of the cracking which you cleared 😂 Btw have started the build will add ceramic wool instead if straw in the last layer Thanks a lot for the advice will follow y’all step by step Just wanted to know the inner diameter and the length and height of the mouth Would be great if you could share those secret measurements 😂😂 The Vedio shows the patience and peace of mind you have attained through sustainable living 😊

[@avasgranb1]

How does it do with bread?

[@HardcoreSustainable]

Works great with bread as well as pizza. The pizza and flatbreads would be baked first at higher temperatures and as the over cools you can bake other foods like loaves of bread, casseroles, or literally anything else you'd bake in an oven.

[@JEHIAHL]

Is there a reason you wet the sand for the base?

[@HardcoreSustainable]

I'm guessing you mean what the fire brick floor of the oven was laid on. I'd guess it's just so it holds its shape better until the bricks are laid and the outer wall of plaster is laid.

[@JEHIAHL]

@@HardcoreSustainable ok, that makes sense. Thanks

[@mauriciomollerdeoliveira7689]

The smoke out of the door hints there´s something wrong with the dimensions, did you get what was the problem?

[@HardcoreSustainable]

What smoke out of the door?

[@mmoellerdeoliveira]

The one the charred your door. The chimney was supposed to be able to suck all the smoke right?

[@mmoellerdeoliveira]

I am working in a double chamber oven and one of my goals this time is to avoid this smoke out of the door.

[@HardcoreSustainable]

@@mmoellerdeoliveira Well, when you are heating the oven with the initial fire you would close the door and all the smoke would go up the chimney, but the pizza baker keeps the door open and a couple logs burning throughout the time he's baking pies. The fire in there while baking gives the pizza a crispy slightly burnt crust, which adds flavor and is traditional for a pizza oven. But it also means some smoke is escaping throughout the time he's making pizzas. As long as the door is open, you are going to be having some smoke coming out.

[@bikr6573]

The irony: editor focused on crack avoidance/repair but 7 months later it cracked anyways. lol One of the causes was that the insulation cushions, which allowed for significant structural movement, were a part of the "structural support". Layers of different composition would already expand at different rate under normal environment let alone when high heat was introduced. I think an interior brick layer or a layer before plaster would have prevented the exterior from cracking. Albeit, nice big fired oven~

[@HardcoreSustainable]

Who is this editor? What are you talking about and how do you profess to know anything about this oven? And what's ironic about it? The person that built this oven has built many other similar ovens. There has been some cracking on the interior of the dome, but that's likely because of the clay. All clays behave differently. Some can withstand high heat, some can't. We used local clay, which is different from the clay we use in Missouri.

[@mihaiviorel6135]

So much work and cracks have already appeared, but it's worth it for a few pizzas

[@HardcoreSustainable]

Yeah, it is. Hundreds of pizzas made, possibly thousands already.

[@stevethomas5209]

Am I the only one that does not understand why an earthen oven ( back yard use) has to retain heat for days after useing it? I understand commercially yes, but back yard only need to heat up to cook for the day, so what's the point other than over building just to do it?

[@HardcoreSustainable]

The better insulated it is, the faster it will heat up, for one. Better insulation always translates into less fuel consumption. Also, this is actually a community oven. It is used to bake pizzas for a farmer's market. We also plan to have community baking days where people can come by and bake stuff in the oven as it cools, so not just pizza but breads and other baked or dehydrated things. But the advantage of it retaining heat for a long time after is that you can use it to bake other things as it cools, and the more you open it and the more you bake things in it, the faster it cools. If it has less insulation, you'll lose that heat faster. But it's true that if you just want the oven for a brief time to bake some pizzas in your backyard, you don't have to build this elaborate design. You could build a cob oven in half a day and it will serve for brief bakes. You don't need this much insulation. But for that matter, why not just use a regular oven then? Why spend hours firing an oven just to use it for an hour and then let it cool down?

[@stevethomas5209]

@HardcoreSustainable OK, that makes sense now thank you.

[@KimRope]

The most hardcore sustainable people are always so into cob ovens

[@HardcoreSustainable]

I didn't know that, but it makes sense.

[@KimRope]

@@HardcoreSustainable that was the funniest reply you could’ve made

[@MarsG0Dofw4r_]

Seems like being in Tampa you could have used local sand, but it's still a bad a$$ oven!

[@HardcoreSustainable]

I'm pretty sure that what we purchased from a local landscaping company is local. It's the same pink color as all the sand in the ground around. The difference is that it's likely from deeper underground. We needed sharp sand, which is square shaped, while closer to the surface the sand is rounded from being weathered by water and not being under pressure. It's also just not very cost efficient if there is lots of sand around to ship it from across the country.

[@XxBrMagicxX]

Kind of an insult to compare such a beautiful oven to such a shite car 😅

[@HardcoreSustainable]

I don't think the regular Tesla models are shite cars. The cybertruck is a shite car. The regular Teslas are pretty state of the art and superior in many ways to internal combustion cars. And being that this is a channel about sustainable living, I'd rather advocate for electric cars, which get a lot better fuel efficiency than ICE cars. ICE cars are also old, old tech and way outdated for current times.

[@XxBrMagicxX]

@HardcoreSustainable electric cars: Yes Teslas: No

[@HardcoreSustainable]

@ Oh, there are so many crappy electric cars out there.

[@Kathy-ku9tm]

Qf w esome❤

[@maker7363]

What an unfortunate waste of a vid. "We taught how to build by turning it into a work shop" You should have added" But we wont share that with you." You did a beautiful job but I watched cuz you certainly implied you were gunna share your knowledge. half an hour lost to the either - which is very wasteful / not sustainable approach. Live and learn maybe next time. Cheers

[@HardcoreSustainable]

Yeah, my plan was to have the extended version be a paid online workshop, but it didn't seem worth it. You get free content with no effort and yet you complain. Most videos on you tube are NOT done as workshops and no one assumes they will be. The entire channel called Primitive Technology is just the guy showing stuff and not explaining it and it gets millions of views. People actually prefer to watch videos like this that don't explain what's going on.

[@maker7363]

@@HardcoreSustainable I complained about the deception that is disrespectful and wasteful. I praised your job. But thanks for ... wasting my time? Free garbage is not exactly a gift. But hey you can think you did a service and I can think you didn't.

[@HardcoreSustainable]

@@maker7363 Watch some other channel then.

[@maker7363]

@@HardcoreSustainable LOL. Wayyy ahead of ya.. but thanks