Posted: 10/06/2013 at 22:44
I would treat with Weed & Feed or Evergreen 80, then when the moss has blackened you can use the electric rake to get it out. The lawn will look wrecked for a while, but in a few weeks it will green up and the grass will spread to cover the bare patches where the grass and weeds were. Mow the lawn at least once a week throughout the summer, with the blade on a fairly high setting. Spike the soil or hire an aerator and then brush lawn sand into the holes, this will aerate and improve drainage.
If the lawn still looks a bit thin by the autumn, scarify and sprinkle some grass seed in late September and water in well. Don't mow any more until the grass starts growing next spring. Tell your OH not to panic. By next year you'll have a lawn to be proud of.