content: I actually have a project on my house that I might use this on so I've been asking myself that very seriously.  The problem is the longer the area it's reenforcing the more tension the material goes under.  I can't find any medium scale projects to base mine off of.  The big ones use grids of stainless. I can always put down more layers to share the tension so the question is what is the highest tensile for the cost.  Steel obviously for the big guys but I think you basically pay a premium on that when you're not at a construction site.