Last year John Wayne, Alan Ladd, James Stewart and a few of their
cronies came and did some work on our house.

One of the things they did was to replace the knackered gutters and
downpipes. However, the felt that (I assume, not being a roofer) is
supposed to protrude from beneath the tiles and lap over the edge of
the gutter was rotten, and wasn't replaced. The gutter is not
reliably immediately below the edge of the tiles, so in places the
rain tends to drip off the roof and fall directly onto the wall below.

We're all out of cash, so I'm looking for a cheap and reasonably long-
lasting solution. One thing I've considered is to insert lengths of
(say) damp proof membrane underneath the last course or two of tiles,
and lap it over the gutter.

However, is there a better solution?

Thanks

Edward