On 19 Mar 2007 11:46:48 -0700, "Paul" wrote:

My ceiling "layer", starting from the bottom;
- drywall (the ceiling you see from the bedrooms)
- plastic sheeting
- fiberglass insulation, a thick layer

I'm wondering - would it be helpful/desirable to have another layer of
plastic on TOP of the fiberglass insulation? Or am I already good?

imho:

Plastic it to prevent the migration of moisture through the
insulation. So a second layer would trap moisture inbetween the
sheets. Mold, poor insulation, etc, bad idea.


Not an insulation expert, and just want to make sure I would be
benefiting my energy bill, and not creating a vapour/condensation
issue.

Understood, niether am I, just passing on information shared with me,
when I upgraded my attic insulation.

later,

tom @ www.FindMeShelter.com