On 16 May 2006 13:16:03 +0200, Chris Bacon wrote:

They sag. They sag, lots. They're better if you put them on
Sterling Board, but that adds to the cost.

They will not take to being stepped on well, and will crack if stepped on in
winter. (Mines are on a double layer of bitumen felt on wood, so are supported
well.) The colored ones lose their color in a few years. No way will it last 40
years or so.


Thomas Prufer