I have searched through the archives and I still have a few questions. All these questions are for yard renovations(no new construction) When sodding is it ok just to roundup existing lawn and remove majority of dead material or is it advisable to rent a cutter and remove it all. I have come up with a price of .30 cents a square foot for removing the old material,minor grading,prep surface and install sod.Anything else is extra.This will vary slightly with size of job.This does not include materials,labor only. Does anyone have any recomendations on drainage pricing.Say for 4 inch pipe to gutter down spoots. What is your opinion on rolling the sod say for Zoysia,bermuda,or centipede. Is it okay to sod over existing ground with marginal topsoil or is it always advisable to cover with topsoil. What is your opinion on sodding yards without irrigation from the standpoint of if the grass fails the customer may be likely to lay blame on installer instead of lack of irrigation.