Builder's Membrane

[Common_Clay]

Is there any down side to using this as ground cover? Aside from not letting the water through, are there chemicals that could leach into the ground from them? They don't seem to let any light through which is what I want. Any advice gratefully received, thanks!

[Common_Clay]

[Common_Clay]

Oops, this is in the wrong section, don't know how I managed to post in here... can I move it to the basics section?

[ACE]

It is alright underground if no light and weather gets to it. On top it goes brittle and breaks into a million bits after time.

[Common_Clay]

Ah, thanks Ace, knew there had to be a catch and didn't think of that.