On 1 Dec 2010 at 2:24, Joe Giliberti wrote:
  Asbestos housing tile is one of the better house
siding materials in
 my opinion. It is very durable, requires little upkeep, and is
 damn-near fireproof. Mesothelioma usually sets in 25 years post
 exposure, so you are probably safe, Jim. 
Apparently, there's also "asbestos" and then there's
"asbestos".
Something about fiber length, with the short-fiber variety less
dangerous:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1877505/pdf/amjpathol00105
-0042.pdf
When I worked in the mills, it was used to line furnaces and the
stuff was all over the place.  I'm not dead yet.
-Chuck