Wednesday, September 1, 2010

Great alternative to PVC suggested by Eric

Eric wrote:
Hi Matt,

This is a great blog, thank you for taking the time!
I have been searching the web for actual construction details to build a living wall.

A suggestion for basin construction. Use 45mil EPDM synthetic rubber membrane.
(To me this is the easy part ;)) I design and build ponds and waterfalls for a living.

EPDM is reusable, recyclable, and has better environmental impact profile than PVC. - See below

1) Build a basic plywood box in whatever shape and dimensions you need.

2)Calculate liner size L x W needed like so:

L x W
(length + 2x Height)X(width + 2x Height)

3)Line the box with 45 mil EPDM rubber, -folding it like a gift box in reverse it to fit the shape of your box.
3) Use a staple gun to attach liner to top edge of your box, and trim the edges with a blade or sharp scissors.

EPDM is available in custom cut sizes as pond liner for water gardens at many garden centers and is available on line at any pond supply place in 5 ft. increments.

*Ethylene propylene diene (EPDM) type rubber is recommended by the Danish Environmental Protection Authority as an alternative to PVC."
"Alternatives to dioxin sources in the Mediterranean," by Beverley Thorpe, Clean Production Action for Greenpeace Mediterranean Project (September 1996) ( As found in Google Answers Answered By: mother-ga on 14 Jun 2002 14:30 PDT)

Thanks Eric and keep the basin suggestions coming. Readymades and materials suggestions are all welcome.


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