There is this siding that seems to be a compressed fiber board or something. Once it ages, it flakes and looks & feels like cardboard. Any clues?
Sorry for the lack of clarity, but maybe there's enough here between the 2 images to be helpful:

http://img102.imageshack.us/img102/4448/dsc07701rz4.jpg
& closeup
http://img102.imageshack.us/img102/4250/dsc07729lp9.jpg

Thanks for any assistance. Kirk