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robertdana

07:38AM | 01/08/03
Member Since: 05/28/01
3 lifetime posts
Bvhvac
After having a home inspector and a repairman tell me that our home needed some more insulation than the single layer of fiberglass batting up there right now, I've been researching DIY attic insulation. Right now, I'm thinking I'll do blown-in cellulose, renting the equipment from Home Depot. After doing some research, I learned that it's important to install retainers to keep the blown insulation from blocking airflow from the soffit vents.

However, upon looking more closely in my attic, I discovered that there doesn't appear to be any airflow from the soffits in the first place. We have partial cathedral ceilings on both sides of the attic, meaning that the soffits are about 5-6ft down from the edge of the attic floor. From what I can tell, this space is completely filled with fiberglass batting, so it's pretty much impossible for air to be flowing from the soffit vents to the attic.

I've read that there should be little ducts or something installed to allow for this airflow, but that apparently wasn't done when the house was built. My question: how much should I be concerned about this? The house has apparently been this way for 13 years since it was built, and in the 3 we've lived in it we haven't had any moisture problems. Should I just forget about it and blow in the insulation?

-R

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