On Tue, 30 Jun 2020 18:31:18 +0100, Jeff Layman wrote:

On 30/06/20 18:14, Algernon Goss-Custard wrote:
snip

You don't just put the butyl liner in the excavated earth. You need make
sure you've removed any sharp objects - particularly stones - which
could pierce the butyl liner. Then you need to line the "hole" with sand
or layers of something else several cm thick. That guards against any
sharp objects you have missed. More information he
http://www.pondexpert.co.uk/fittingandfillingaliner.html

So you will have to pump out the pond anyway before fitting the liner.
Once the lined pond is full of water, it won't make any difference if
rainwater gets behind the liner as the pressure inside and out will be
equal.

Old carpet is a good way to line a pond and protect the butyl liner.

As Brian has already said, 1 metre isn't that deep but with luck it will
be deep enough to prevent the water freezing all the way to the bottom in
a harsh winter.

Cheers


Dave R


--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus