House collapse. (Copied from UK legal.)

[Adam Aglionby]

Dimpled membrane was the big break through...

Pump the water out of a sump at the bottom, probles if the pump fails

[N_Cook]

That would not work for this over the top "Grand Designs" floating house

I was uncomfortable with 4 dolphins. I would have said 3 as a triangle , was less likely to jam than a square. But I could not scientifically justify 3 rather than 4, I just kept thinking of the dairmaids 3 legged stool.

[Chris Hogg]

Have they tested it under realistic conditions?

"Oh Damn, there's a drain we forgot to seal up! ABANDON SHIP"

[harry]

Most of the designs I've seen seem to have drains beneath and a sump and pump to clear ground water away. The concrete box must be pretty weighty too.