Hugo Nebula wrote:
On Wed, 17 Jun 2009 02:59:56 +0100, a certain chimpanzee, The Natural
Philosopher randomly hit a keyboard and
produced:

Wityhout further attention like a flat roof technology underneath, my
architect said

Machine tiles that interlock, about 18 degrees..depending on the BCO.

Your architect's a tool, then. The pitch of concrete interlocking
tiles is laid down by the manufacturer. It's not something that is
varied, unless, as you say, you have some additional protection under.

So you think that if the manufacturers say '17.5 degrees' the roof will
be 100% watertight at 18 degrees and leak like a sieve at 17?

Nothing is exact and precise, and the BCO knows it, and the architect
knows the BCO knows it.