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Anyone here tried foam concrete for small home extensions?

Joined
Aug 19, 2025
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I'm considering using foam concrete for a small home extension. I've heard it's lighter, easier to work with, and can save money on materials. Has anyone here tried it for residential projects? I'd love to hear about any durability or insulation concerns you might have noticed over time.
 
I've looked into it as part of an Earth Ship Tiny Home I'd like to build.

For those who don't know much about air-crete (foam concrete) here is a youtube video showing a Dome Tiny Home built for cheap & quickly. What do you think of it ?

How to build your AirCrete Tiny Home

 
Just make sure to seal it well since it's more porous than standard concrete, so moisture can creep in if you're not careful.
 
Air pockets give it good thermal and acoustic insulation. It can make a home extension more comfortable and energy efficient.

But because it's lighter and has a lower density, it's generally not as strong as regular concrete and may not be suitable for load-bearing walls.
 
I haven't, but it's difficult to say what specifications you need without knowing your project's purpose. However, you might want to consider looking into foam cinder blocks. They have been used for many years and have a proven history of meeting various construction needs, so they could be a good fit for your project. Good luck with your project!
 
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