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Startup Builds Houses by Pumping Concrete into Inflatable Forms

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Re: Startup Builds Houses by Pumping Concrete into Inflatable Forms

#21
post #10
post #6

Earlier quoted context omitted.

Well concrete is not waterproof (generally) so they are technically also using the form as waterproofing. It's pretty clever IMO but you'd need rebar at the very least for any structure worth building...

Concrete construction without rebar is more durable and worth bringing back. https://en.wikipedia.org/wiki/Roman_concrete

How well does it handle earthquakes?

Re: Startup Builds Houses by Pumping Concrete into Inflatable Forms

#23
post #15

Is concrete actually a good building material for homes? It doesn't seem like it'd be insulating, and you're definitely not getting internal plumbing/wiring. And concrete is actively bad for the environment. It all feels like the shipping container home -- seems great at a glance, but doesn't really pan out to be lived in. Ikea style flatpacked prefabs still seems like a vastly better option to me.

Cement production is one of the biggest carbon emitters. There's also the issue of using PVC for the form. None of this seems eco-friendly.

Why not 3d print homes at that point? At least you can get the rebar and other forms in place ahead of the print, and you get more flexibility in the final design of the structure.

Re: Startup Builds Houses by Pumping Concrete into Inflatable Forms

#24
post #21
post #10

Earlier quoted context omitted.

Concrete construction without rebar is more durable and worth bringing back. https://en.wikipedia.org/wiki/Roman_concrete

How well does it handle earthquakes?

It doesn't.

Re: Startup Builds Houses by Pumping Concrete into Inflatable Forms

#25
post #10
post #6

Earlier quoted context omitted.

Well concrete is not waterproof (generally) so they are technically also using the form as waterproofing. It's pretty clever IMO but you'd need rebar at the very least for any structure worth building...

Concrete construction without rebar is more durable and worth bringing back. https://en.wikipedia.org/wiki/Roman_concrete

Isn't there a massive difference in wall thickness between what the Romans did and what we do today?

Re: Startup Builds Houses by Pumping Concrete into Inflatable Forms

#26
post #3

This seems awful. The inflatable form is not reusable.

Even worse, it becomes the inside and outside vapor barrier for the entire house. An air tight home lined with phthalate-laden PVC? No thank you.

Dangers of pthalates notwithstanding, you do actually want an airtight home. Ventilation should be controlled and filtered with the HVAC system.

Re: Startup Builds Houses by Pumping Concrete into Inflatable Forms

#28
It seems like a ton of these prefab projects show up on HN, but does anyone know of any that produce houses/structures that actually… look nice? It seems like everything I’ve seen on here have all the aesthetics of a shipping container. (Or, to be more on the nose, a concrete box).

Re: Startup Builds Houses by Pumping Concrete into Inflatable Forms

#29
post #15

Is concrete actually a good building material for homes? It doesn't seem like it'd be insulating, and you're definitely not getting internal plumbing/wiring. And concrete is actively bad for the environment. It all feels like the shipping container home -- seems great at a glance, but doesn't really pan out to be lived in. Ikea style flatpacked prefabs still seems like a vastly better option to me.

It can be. Concrete isn't a great insulator, but it can moderate temperature changes, so if you have big swings between the day and night, it will keep things cooler in the day and warmer at night, which can be helpful. But if you get a heat wave where it stays hot at night, you're going to be real warm inside the next day too.

This article mentions 100 and 200 square feet buildings, so I don't think there's gonna be much in the way of internal structure. I could see an inflatable structure with 'tubes' at certain places for wiring and plumbing to pass through, which would save cutting holes later.

But like everyone else says, there's easier ways to get the frame up faster. What makes construction slow is coordination between the many different trades that need to work in the same area. With many parts in sequence, and each trade having high utilization, scheduling is difficult --- either you plan with large gaps between trades, or you blow up everyone's schedule when one trade falls behind for whatever reason.

Re: Startup Builds Houses by Pumping Concrete into Inflatable Forms

#30
post #15

Is concrete actually a good building material for homes? It doesn't seem like it'd be insulating, and you're definitely not getting internal plumbing/wiring. And concrete is actively bad for the environment. It all feels like the shipping container home -- seems great at a glance, but doesn't really pan out to be lived in. Ikea style flatpacked prefabs still seems like a vastly better option to me.

Well, the vast majority of Europe builds concrete homes. We definitely get insulation, internal plumbing and wiring.
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