On Wed, 19 Nov 2008 19:41:55 -0000, dennis@home wrote:

I'm not impressed that their other main selling point is *scare* -
oooh deadly, nasty lead.

Didn't impress me either. Though I think it trying to sell the scare story
to employers and workers rather than the people in the building.

Lead does leach into water, it happens most in soft water like
rainwater.

You store and drink rain water? Lead on the roof is not a toxic hazard to
the occupants.

And it is probably true that people who work with lead have more lead in
their systems.

Quite possibly but significantly different? We've all got far more lead in
our systems these days than the population had 100 years ago. Leaded
petrol has seen to that. Of course I wonder what the effects of working
with a butyl substance and aluminium is? Aluminium has links with
dementia...

Personally I want something that will last as long as the rest of the
roofing material and as that is slate here we are looking for at least 50
years and possibly over 100. I have my doubts that a butly thing will last
that long on the sunny side of the house.

--
Cheers
Dave.