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Thread: insulation question

  1. #1
    Join Date
    May 2007
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    Rhode Island
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    800

    Exclamation insulation question

    Guys I've got a question on blown in insulation. I've seen houses getting it while I was delivering the mail & some houses are the same type as mine, a Ranch house with a full basement. They cut holes on the outside under the siding at about 1-1/2' above the foundation and again near the top of the roof.We also want to do this. We also are going to have blown in added in our attic. I've seen episodes of "Holmes on Homes" where insulation didn't let the roof breath & the sheathing got covered in condensation which caused massive mold & rot he said If I remember right they should have had baffles so the soffitt's could breath.

    Questions are:

    1. Why cut two sets of holes?

    2. with a Ranch house with a full basement we have no soffits so how will / does the roof breath.?

    3. How do we know when to use those roof baffles & where to correctly place them?


    I know there is more questions I should ask but I don't know the correct questions to ask you guys. Any help or advice is greatly appreciated.

    Thanks

  2. #2
    Join Date
    May 2007
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    Thomasville, GA
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    6,000
    Test re-direct.
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  3. #3
    Join Date
    Nov 2006
    Location
    Delton, Michigan
    Posts
    17,475
    thanks for unlocking it tom and bill for trying to now he can get some good advice from the folks here
    If in Doubt, Build it Stout!
    One hand washes the other!
    Don't put off today till tomorrow!

  4. #4
    Join Date
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    Location
    Rhode Island
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    Ok here's pics of my roof. Like I said I have a Ranch house with a full basement single level no stairs inside house. My roof goes directly to the gutters.


    Click pics for full size.



  5. #5
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    Thank you guys for the help.

  6. #6
    Join Date
    Nov 2006
    Location
    Delton, Michigan
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    well the cheapest way to get good air flow is to install roof vents at the eave area and then near the peak. you could run a continuous ridge vent and thats not a real costly job and one you can do chuck.. the eave area is the worst headache..the cheap roof vents need to be as close as possible to the eave to get proper air flow. look up air flow for roofs in a google search and you will see some examples of what i am referring to.
    If in Doubt, Build it Stout!
    One hand washes the other!
    Don't put off today till tomorrow!

  7. #7
    Join Date
    May 2007
    Location
    Rhode Island
    Posts
    800
    Larry,
    That is beyond my comfort level to do. I would be to afraid of screwing it up & besides my wife would NEVERlet me do it.

    Until I have the money to have a ridge vent installed I was trying to get advice on having the blown in insulation close to the ends of the rafters where they connect to the outside walls. This is where I am afraid of the house not breathing. Our sheathing has no mold & I don't want to have mold grow after we have the blown in done.

  8. #8
    Join Date
    Nov 2006
    Location
    Delton, Michigan
    Posts
    17,475
    well if you get a reputable installer he can make sure its done right chuck,,use that ask nancy site that has only good contractors listed by real consumers,, not sure if the site name is correct but someone here will know the right one
    If in Doubt, Build it Stout!
    One hand washes the other!
    Don't put off today till tomorrow!

  9. #9
    Join Date
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    Location
    Rhode Island
    Posts
    800
    If that's the one on tv. you have top koin & they want $49 to join for a year.

  10. #10
    Join Date
    Mar 2008
    Location
    bethel springs TN, but was born and raised in north east PA
    Posts
    3,132
    Chuck if this is just blown in insulation,not this new spray foam insulation you shouldn't have any problems at all. The reasons they drilll holes top and bottom is to make sure the insulation fills the cavaties, and not bunch up on a nail or a block hidden in the wall. As far as you having your roof vented i see from your pics you do have gable vents. So if you ain't spraying foam on the rafters there well still be plunty of air flow up there and if you havn't had any problems by now you shouldn't have any. Larrys recommendation of getting your ridge vented is a real good thing to do. It will save on your shingle life, by not letting them get so brittle so soon. Hope this helps
    Steve

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