I think moving the roost a bit away from the wall and roof is a good idea. I will be doing that as well. I think for temps like my area, auxiliary heat is not needed. Last winter was our chicks first winter. They did well. The attached picture shows the inside temperature of the coop one morning. It is of course the one that says "outdoor". The temp went from 0 at midnight to -2 at 7am. We also get humidity readings which I hope to lower this winter. More ventilation to be added.