"Peter Andrews" wrote in message
...
I'm considering using some aluminium sheet as a capping for some
brickwork - is there any chance of a reaction with the existing copper and
lead on the roof? They won't be in physical contact but the water will
run/drip from the aluminium onto the copper and lead roof.

Peter


If there is no contact you will not have a problem.

If you had any contact the aluminium would go first.

Baz