Hello Uchenna, We are doing structural tests that seem to indicate that going to two stories is feasible. our lavacrete material has a compression strength of 6000 psi which is about as strong as an airport runway. We are focused on refining our technology on 1 story homes first, but eventually plan to attempt 2 story. The structural engineer tests to do so take a while, we want to ensure quality and safety.
We have already 3d printed two homes and are in the process of print dozens more, so we are past proof of concept. The houses are not free, but we are aiming to substantially lower the cost of construction on a $ per sq ft. basis. Currently the only structures that the homeless community is using that have a reasonable price point are trailers and tiny homes, however with 3d printed homes we aim to deliver more resilient structures that are much more durable and provide better value long term. In terms of engagement I have completed 40 interviews with families on the verge of displacement. Also 3d printing provides nearly unlimited design flexibility and cost of customization is very low. We aim to use that to design homes that are beautiful, dignified, affordable, and meet the needs of the community. Thanks for you feedback.