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Old 12-22-2010, 10:27 AM   #1
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Eliminating heat loss through attic


I just read the thread "frost in attic" with great interest.

I have a small attic over an ell that's melting snow and causing ice dams. For now I have to manually pull the snow down with a rake I made.

The thing that's a bit different in my scenario is that about 1/3 of the gable roof is in the bathroom. This is at the north side, where the ice builds up. I can't do much with that section right now. I suspect it would involve taking down the ceiling (2x6) and making it thicker so I can add more insulation.

On the 2/3 that is open, I'd like to do whatever I can.

I added a fascia with vents this summer. There were none. There's a single gable window. I assume I should leave it open. It's closed right now.

Oh, and the exhaust pipe from the stove runs through this space.

There's insulation in the floor now, but there are gaps and no barriers to eliminate suction.

My idea:

-Take up all the floor boards.
-Add insulation as required to fill voids and depth between joists.
-Tape and mastic the exhaust pipe.
- Wrap the pipe with reflectix or traditional duct wrap.
- Find some kind of sheet insulation and tape for the wall to prevent warm air from being sucked from the main house.
- Lay down additional sheet insulation on the joists and then plywood instead of the boards?
- Some kind of vapor barrier for this floor?

Does this seem right? Am I right in thinking that the answer is not to insulate the roof in the attic, but rather the floor and the wall where it attaches to the main house, making the attic as cold as I can?

Thank you!


tbeaulieu is offline   Reply With Quote

attic insulation ice dams

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