Hello, need some advice on what we've been told by a gardener. We have a poor lawn- mossy, uneven, full of weeds. We've spent a year trying to improve it with limited success. A gardener has told us that we could lay a membrane over the top of the existing lawn, topsoil and then sew new grass seed. Is this right? He says it will be cheaper and less time intensive than digging up the existing lawn first.
I'm wondering about pros and cons of this method, any ideas? Thanks 