I was hoping someone could give me a bit of clarification. I'm in the process of building a new viv, I have the hygrolon ran down into the drainage layer hoping to wick that water back up. Will I have issues with the ABG touching the hygrolon?
you will. The issue is that the ABG is also an excellent wicker. If you have it in contact with the wet hygrolon, you'll have wet ABG. Naaaasty.
The fix is simple, but not always easy to achieve. (Much better to do it in new construction, not remodeling. So to speak.) Just have a wicking break or barrier between the 2 materials. A barrier (waterproof
) would be something like a pane of glass. A break (draining
) would be something like a lens of Turface or LECA, or a "slice" of Matala or Epiweb. Separate the wickers, that's the job you need to accomplish.
Nowadays I mostly use Matala for such applications. I bought quite a bit of it and I have lots of scraps laying around. And it's great
at this job, it doesn't compress and it weighs nothing. It doesn't need to be full thickness either, you can double your coverage by "filleting" it. Use fiberglass window screen on the ABG side of the Matala or other wicking break, to keep the ABG from working through & completing the "wicking bridge" in future.