Pete C wrote:

Derek Broughton wrote:
Sheila wrote:

Pete C wrote:
Sheila wrote:
Yesterday we were talking to a guy who builds ponds and he said
that a vinyl liner will crack in several years and a rubber liner
is the way to go. We were talking to him about how to redo our
pond. Is vinyl, which we have not going to hold up for many years?

Sheila
Vinyl will last 4/5 years if your lucky. Depends very much on how
much exposed material is in the sun. Butyl is the way to go,
usually guranteed for at least 20 years.


Is Buytl a time of rubber? I've not heard of it before.

Yes. It's extremely heavy, and really not the choice of _anybody_
who's built a large pond before. EPDM (ethyl poly blah blah blah :-)
) is much lighter, and often has the same guarantee. There are even
lighter woven HDPE (high density polyethylene) plastics - they're
certainly the choice for _very_ large ponds, because they're much
lighter and cheaper than EPDM, but they can sometimes be awkward, as
they're stiffer than EPDM.

Heavy?? I don't know what you're thinking of Derek, but my liner is only
0.75mm thick.......no weight at all.

Millimeters? Not "mils"? Liners in N. America are generally measured in
mils, and a 75 mil liner is thick. If it's really .75 mm, that's 30 mils,
and I'd say too thin for an EPDM or vinyl liner, but not HDPE and _perhaps_
not Butyl. Either way, butyl is a lot heavier than any of the alternatives
at the same thickness. If it isn't heavier, it isn't butyl.
--
derek