How to Build a Poured Concrete Hot Tub 

I would love to see more of the forming process, I feel as that was skipped over! great build

im living apartment in seoul now and so jealus about how large living place american has.

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The maine reason you never hand mix concrete for engineered insitu reinforced concrete structures is, you can never be accurate or maintain the integrity of the concrete mix to achieve the design strength, unless you are using a batching plant on site, a Ransome with strict adherence to proportions of aggregates, cement and admixtures, then you may be closer to achieving the desired outcome. Also remember to use a poker vibrator to ensure the concrete is settled and all the air pockets are removed. Do not over vibrate or you can cause a separation of the heavey aggregate from the concrete mix, causing honeycombing, and fast dehydration of the concrete. What is not mentioned is the difference between a two armored part pour and a monolithic pour. In a monolithic pour, the forms and rebar are placed,.along with any plumbing fix, allowing for a one time pour to ensure uniformity and the need for waterproofing between pour joints, as it would be for a multiple pour structure. You would need to set a waterproof moisture barrier material in the concrete to prevent leaks and seepage. Remember, concrete poured in parts does not join.

that is a beautiful hot tub! and a great tutorial about the construction I'm currently constructing one myself. doing it all myself to save a bit of money. I can get the wooden reinforcement quite cheap or free by using pallets and off cuts, and intend to use the earth as the outer support and concrete board designed for wet rooms as the inner layer so I have a nice smooth finish and less wood to remove (its nearly as cheap as wood at the moment anyway). its not quite going to be as fancy as that one but honestly I'm hoping for something not too far off but for a fraction of the price once I'm done just out of curiosity, what was used to mould the shape of those curved seats? I've got a size for my hole that will give me a 3m x2m tub with a depth of about 1.4m. I am currently planning out the interior. if its not overly difficult (as in it just takes some time and hard work) I'll definitely go for a similar layout with those curved seats and add an extra couple of jets into the design

Schéma tube

Porosity

what was his total time and total cost for his build?

Now for the question many probably have: How much does it cost to build a tub like that?