(Searched around on line for a while and could find nothing pertaining to it. All I could find about fiberglass and plants were some people expressing concern about potential chemical / toxic leaching into the growing media.)
Have been working on building eight 12 gallon SIP's. Am at the point where I need to start cutting the landscape fabric to line the bottom to keep the mix from falling though the holes in the support plate. I have a lot of 3/8" holes drilled in those support plates and am pretty sure I will need something there.
The landscape fabric I have on hand is pretty heavy duty stuff. It is air and water permeable, but is a dense, thick, synthetic weave. To put it in perspective, I bought a huge roll of the stuff 6 years ago or so, cut 20' x 2' strips out of it to lay between rows in the garden as a weed barrier. Works great year after year and is showing little sign of wear. The stuff is not so easy to cut and I am thinking may not be the greatest for drainage and air flow as the liner in the bottom of a SIP.
Was rooting around looking for some stuff to build a sand sifting sifting screen that I will be needing. Came across a good sized roll of fiberglass window screen (sliding glass door size). Any issues using the much easier to cut fiberglass window screen as a liner in the bottom of my SIP's? Am sure it will hinder draining and air flow a lot less than the heavy duty landscape fabric.
Thanks much.