
Originally Posted by
Louis Charles Bruckner
What I have used in the past for large areas to keep substrate from falling into the expanded clay balls and keeping a water permeable layer
is plain old window screen that is non metallic.
You can cut it to fit the area then sew pieces together to form a lip edge around water features ect ect.
It is inexpensive and is available at just about any hardware store pretty cheaply.
just remember not to get the metallic type.
The cloth type holds up pretty good and can withstand heat pretty good if it is too close to a heat element.
The vinyl type not so much.