In article , Andrew Gabriel
writes
In article ,
fred writes:
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.

I've never found a house with the bottom row of tiles nailed down
(and usually, no rows are nailed down except possibly on the edge).

Ah, the joys of shandy land ;-). Ooop 'ere is testing land for roofing
systems and if it ain't nailed down it doesn't stay on.

Don't fix them to
the gutters, or you'll have problems with differential expansion and
you'll curse if you ever want to take the gutters down.

The gutter suggestion was a last resort, limited access to fix from the
top, too far from the soffit so what's left.
--
fred
BBC3, ITV2/3/4, channels going to the DOGs