Denny, if you can't put in a 'real' ceiling, putting up poly as you would for vapor barrier, does a lot to help with heating and will make your fans more effective
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics