Thanks for that tip - I'll keep it in mind. The
pop-up irrigation guy's been here for a couple
of days and has the job mostly finished. He does
need to come back for the 'finishing touches,' as
soon as it stops raining! What this progress means
is that after I finish all the tidying up of the
mess, the pond conundrum is next to be solved.
Trying to think a little outside the proverbial
box, now. I was wondering if a powder might be
applied to the shingle, then water sprayed gently
on it. I was thinking of a mix of bentonite*, plus
cement powder. Say, 4 or 5 to 1. Might that do
an odd mix of penetrate the shingle a little,
then set? I'm thinking of doing a test area,
as, well, a test.
Anyone got any similar odd-ball ideas? Or comments
on mine, of course.
The fall-back is a layer of carpet or under-felt,
overlaid with 50 micron, black polythene film.
* The New Zealand stuff is not as good as the USA product.
