On Thu, 10 May 2007 19:03:21 -0400, Andy Petro wrote:
My front lawn is full of weeds and blank areas. I am thinking of putting
on some top soil, about one inch, and then new sod. Do I have to remove
the old grass underneath it first ?

Don't do anything until you've figured out why your lawn is full of weeds and
bare soil. Compaction? Fertility? Shade? Watering? Poor selection of
species? Too much foot traffic? Bad mowing?

Fix the problem(s) first.

Kay