We need to pass some pipes through our corrugated asbestos garage roof,
so although for many years we've followed the advice to leave well
alone, it makes sense to now get rid of it and replace it with something
less scary. The Garage has a flat sloping roof and adjoins the house.

I can find plenty of information about how a DIYer can safely remove and
dsipose of the asbestos sheets, but I'm wondering what would be best
used to replace it ?

Any suggestions would be welcome. Do building regs influence the choice
of materials ? Which materials are most practical ?