Is this enough attic ventilation? - Page 5
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  1. #53
    Join Date
    Jul 2004
    Posts
    253
    Originally posted by Carnak
    I always thought that venting the attics was first off a northern thing, to stop condensation in the winter.

    I can see a house in the summer, with poor ceiling insualtion benefitting from a power venter, however sometimes they can depressurize the whole home.

    I do not have to worry about the cold weather where I am now, and I think it is better not to vent the attic as it just allows more humidity in.

    We had a guy from some icynene (sp?) down here a while back and they promote insulating the whole pitch of the roof and sealing the top of the walls to the roof. May only end up with a 100 degree attic this way. It also seems to rely on leaky supply ducts for additional cooling in the attic.

    Seems like a good way to go in the hot humid environment, insulate the pitch with something that does not trap moisture and keep the humid air out.
    I see 80-90F in the summer in south GA with an unventilated attic.

  2. #54
    Join Date
    Jun 2003
    Location
    GA
    Posts
    395
    Originally posted by tuccillo
    Originally posted by Carnak
    I always thought that venting the attics was first off a northern thing, to stop condensation in the winter.

    I can see a house in the summer, with poor ceiling insualtion benefitting from a power venter, however sometimes they can depressurize the whole home.

    I do not have to worry about the cold weather where I am now, and I think it is better not to vent the attic as it just allows more humidity in.

    We had a guy from some icynene (sp?) down here a while back and they promote insulating the whole pitch of the roof and sealing the top of the walls to the roof. May only end up with a 100 degree attic this way. It also seems to rely on leaky supply ducts for additional cooling in the attic.

    Seems like a good way to go in the hot humid environment, insulate the pitch with something that does not trap moisture and keep the humid air out.
    I see 80-90F in the summer in south GA with an unventilated attic.
    Do you read Joe Lstiburek's work or HE mag?

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