Oren wrote, on Thu, 11 Dec 2014 09:26:02 -0800:


I walk in the valley (s) of the tile and not the peak (s). I've not
broken them before. Wearing tennis shoes makes me fell more
comfortable, walking on the tile. It is like "walking on egg shells".

(a) You probably aren't as fat as I am, and,
(b) My tiles are 're-roofing' tiles (not originals).

So, they're especially 'breaky' (unfortunately).
I still have to go up and repair some ... sigh.