The main material could be smashed/pulverized glass. The stoage of direct renewable electricity to heat makes the cost (Overall, including climate responsibilities) more appealing when considered along the same lines as Solar panels, or concentrated solar - using a FPS converter that can utilized that direct heat to generate heat back into electricity makes the project a bit of a challenge, but overall a pragmatic solution for long term use cases. Build up in tight spaces and consider alternate uses like wind sheilds and parking spaces when it comes to space conformance. 🤔 I hear aircrete is an insulation thats already prevalent in europe is this true?

My parents were planning to build a cabin around a Russian stove (massive stone chimney with beds and a ton of thermal mass) for overnight heat, but ended up in an RV instead when their retirement coincided with the housing collapse.