In article
,
writes
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.

These are intended for this job:
http://www.screwfix.com/prods/36622/

They're meant to be fitted under the felt so that any leakage past the
tiles runs off the felt, onto the tray and then into the gutter. Fitting
is easiest before the tiles go on but a retrofit with you just lifting
the tiles shouldn't be too bad. The weight of the tiles may be enough to
hold them but a self tapper into the gutter would make it more secure.

As you appear to have had the bad bunch out, I don't imagine there's any
risk of the tile fronts being clipped down.
--
fred
BBC3, ITV2/3/4, channels going to the DOGs