Hi all

How is it possible to replace individual interlocking tiles, without
stripping the whole roof?
The tiles are cast (concrete derivative?) and have a single securing nail to
the top edge.
One side of the tile locks under and the other side locks over the adjacent
tiles.
I can't see how these can be removed individually, but equally, can't
believe that tiles are made such that you have to strip the entire roof to
replace one!

TIA

Phil