Cristo Balete wrote:The idea behind cardboard is that it blocks out the light, but with builder's paper I doubt you'd get the same effect. I've tried large sheets of plywood and that didn't work.
Quack grass is going to take a lot more than that. I once saw it come up at the side of a 20 foot cement pad, go straight across it and latch onto the dirt on the other side. I've tried large sheets of plywood and that didn't work. When I've had to remove it, it's been by deep shoveling and lifting, not snapping, the white roots and escorting the long chunks off the property. I'm not sure it ever goes away without a serious spray, which I know we want to avoid.
chip sanft wrote:Builder's paper is cheap and its seamlessness would be convenient. But I wonder what all is in there in terms of preservatives, anti-molding agents, etc. If it's imported, depending on source there might be some real poisons in there. Same for cardboard, I guess, but at least cardboard is free. And while North American made cardboard isn't necessarily poison-free, you'd at least have some idea of what's in there.
Cristo Balete wrote:I can't help but think that 40,000 sf of black rubber is going to mess with your ecological balance there. It's cutting off the interaction between soil health, soil creatures and air creatures. If rubber sheeting worked, you wouldn't need it anymore, would you? The "immune system" nature puts into place in a natural/organic/Permaculture system can't function with a rubber barrier. Even cardboard eventually breaks down and is out of the loop.
The single focus on just quack grass takes away our seeing the bigger picture. I am in a rural location where there are nothing but weeds, a huge biodiversity of healthy weeds, which is how we should look at weeds. I mow them, mulch thickly with them, and use them as a crucial element of soil health improvement, worm habitat, beneficial insect habitat, wild bird habitat.
Trying to eliminate all weeds is going to destroy your permaculture system.
Yes, quack grass needs attacking, but there are more healthy ways to do it, which are in multiple threads here.