Wall heater vent through ceiling

Post all other heating and cooling questions here.

Moderators: Greg, Mark

Posts: 5
Joined: Tue Jun 21, 2011 5:41 am

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

User avatar
Posts: 5666
Joined: Wed Feb 28, 2007 8:01 pm
Location: Weedsport, NY

Sat Oct 27, 2012 5:10 pm

What does the manufacturer say? I would contact them for the best answer. Lacking that I would use a 4" ceiling thimble to protect anything near the pipe.

"If I can't fix it, I can screw it up so bad no one else can either."