If you are unsure what vent pipe your furnace uses check the manufacturer s specs.
How insulate gas attic vent.
Before you can insulate your attic you need to properly seal the chase for the furnace vent pipe.
Use a zippered insulated tent to keep the enclosure draft free attic tent at 7 attic cover insulator 120.
How to insulate a metal flue pipe.
Affix rigid foam insulation to the attic side of the hatch or door.
Attic hatch or door.
Step by step guide to sealing furnace vent pipe.
That means insulating the attic floor only not the walls and having vents in the roof.
A finished attic should be insulated much like the rest of the house with insulation in the walls and ceiling.
Unless your furnace is older than the 1980s you are probably dealing with double walled vent piping.
How to insulate a finished attic.
Tip insulating a kitchen range vent hood is a good idea for safely removing carbon monoxide natural gas and odors through duct work that directs these pollutants outside the home.
Add weatherstripping around the perimeter and a sweep to the door of a walk up attic.
Pull down stair or ladder.