Ok, year #2 in the beautiful newly built house in the NE with the
crappy lawn. Builder half-assed it and the lawn is sparse with a lot
of crabgrass. I don't need a "home and garden" lawn but I'd like some
grass !
Questions:

1. My thought is to use a slit-seeder rented from home depot since
previous attempts by just chucking down seed and watering has failed.
Make sense? Other ideas?

2. Is now a good time to seed or should I wait 2 weeks or a month?

Thanks for your guidance!