Hi, I have a newly constructed home and I have a terrible weed problem. I have crushed granite covered the dirt, with a net type material under that. I know the net material is suppossed to stop weed growth, but it sure doesn't. I don't know if I should lay more rock, if that would stop them, or if I need to lay down a thicker or better tarp to prevent them. The types of weeds vary depending on the time of year, but the rock is covered with them in a matter of a couple weeks after pulling. I don't have any flowers or anything, so the net isn't full of holes, I just have the smallish shrubs (spirea type) that came with the house. I'd love some advice.