Hi Mark I'm new to this forum and really enjoying it. I garden for a living and have worked with many lawns. An unsatisfactory lawn due to weeds or creeping bent grass isn't as easy to fix as tear out the old and put in the new. But to accomplish your purposes by installing new sod involves a lengthy process. Once the old sod is removed, wait and
water. There will be a rapid regreening of the surface. Millions of seeds that were residing in the soil will be sprouting and the remains of the old sod renewing growth. Kill them somehow, organically or otherwise (glyphosate only if otherwise) and wait. And water. Encourage the remaining seeds and grass
roots to sprout and kill them! In this way, your new sod has a chance of performing better than your old sod. If you don't do the killing part those things are just going to show up in your new sod. Brutal, I know, and not something I, as a
permie gardener want to do, but this answers your question. The bent grass never went away.
