Have a ? im doing a complete remodeling job on a house i just picked up for a rental. The walls and ceilings are plaster and lath. I plan on gutting the whole house my ? is can i leave the existing ceiling (10 foot) in place since there is around 24+ inches blown installation. I plan on dropping the ceiling to 8 foot. So i was thinking can i use a hole saw 2-3 inch and use pvc pipe long enuff to go above the blown installation so air can circulate between the new and existing ceiling? I do plan on blowing in installation on the new 8 foot ceiling also.