[architectural details] ugly method

Spanish tile roofs are not usually constructed this way. Here is some more information of you want to know about it. Typically, the tiles are attached with nails through a hole in the tile, similar to the way they attach slate tiles. Gravity keeps them from shifting.

I am not sure why the chose to build the roof this way. I assume it to withstand hurricane force winds. But frankly, this is ugly. And since this is over a patio and easily seen from passerbys, they could have chosen a nicer method.