I am still learning about St. Augstine grass and I need your valuable insight and information. As most of my stories start with something about how I used to do it up north and this story is no exception. I would sub grad with my bobcat, spread loam(topsoil) and grade, then hand rake and spread seed or sod. BUT, when I came to Texas I found that most lcos put st.augstine right over fill dirt or even sand. I was told by some people in the biz that most guys dont use any sort of topsoil. I gained a new lawn account and they told me they were going to build a new house this spring. I informed them that I used to do new installs and that I would do their landscaping the right way, unlike the morons that builders use. They were very interested about putting top soil down , no matter the cost. This got me thinking that I could get more work grading and putting down top soil with my bobcat. sorry to be long winded. Is there any point putting topsoil down under st. aug?