Insulation, Radiant and Vapor Barriers - AVOIDING ICE DAMS

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01-15-01, 11:33 AM
Suppose I'm laying a foot of fiberglass down fresh in an attic. How close to the underside of a slanted roof can I come with the ends of the batts. I read that they cannot touch the underside or any part of the ventilated soffit.

Thanks,

Buck

01-16-01, 06:58 AM
I have a similiar problem--but first--you do not want to block your soffit vents (if you have them) with the insulation. This would seem easy with fiberglass rolls--but I have been talked into blow in celluose. Hence my question is how do you prevent the celluose from blocking the soffit vents? Once its blown in I hate the thoughts of trying to walk across joists you can no longer see to clean out the soffit vents!
01-16-01, 08:41 AM
Quote from Owens:

"To make sure the eave vents aren't blocked, Owens Corning
Raft-R-MateŽ attic vents or baffles should be installed to provide unrestricted air flow from the soffit to the attic."

http://www.owenscorning.com/owens/around/insulation/project/images/oc06967.jpg

You can buy similar baffles at Home Depot.