On Wed, 22 Dec 2004 23:12:01 -0000, RichardS wrote:

Again, 1/2" of the same soot-like retardant,

As the property was victorian that stuff probably was mainly soot from
the umpteen coal fires in the neighbourhood. There was no sarking in
my parents house and that had a good 1/2" layer of black dust in it
and that was only built in the 1930's...

--
Cheers
Dave. pam is missing e-mail