Wall heater vent through ceiling
Posted: Sat Oct 27, 2012 3:25 pm
I have a metal roof with 2x4 rafters, no attic. There is rock wool insulation plus a layer of batt insulation covered with think plastic sheet. I installed a wall heater with a 4 inch B-vent through the roof. I'm concerned about the plastic film getting too hot in the small space above the ceiling. I peeled the plastic back a few inches from the B-vent. Any comments welcomed