My father is an architect. He told me that in the nineties he made the interior of an apartment to a newbie. Tom had to build in the old St. Petersburg house (you know what the roofs are there?) A huge swimming pool. The father immediately said to him - even if we inject this structure here, you will get water in it - it will fail to the hell. Eventually, his father spit and left, did not work for him. He hired another and made the same thing and then flew down two floors in the bath of his dreams.