You are right. I had a collapse. As I said, I learn from my own mistakes. I know, many people told me to put them overlapped, but I wanted to experience something else and I did it in straight columns. I wanted to have certain amount of columns with a certain amount of levels (21).

Yes, during the winter I had a collapse, a huge step back for me, almost half of the bags were fallen and I had to to put them back, some of them even re-make them entirely because the bags were exposed to sun too much and were damaged.

Now I stuck a long metal bare through all the bags and fixed to the pylons and between the walls. Will never fall down again, not even if somebody will try to make it happen.

No worry the next house will be built with overlapped bags. But I am still not so convinced about its efficiency.