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  1. #1
    Join Date
    Mar 2008
    Posts
    205

    Foam vs Cellulose Blow in

    I do realize this isn't a insulation forum per se, but you guys I trust. WE have Phase I beginning next week of our project-insulation.

    We have 4 guys coming out to give quotes. Already have raw quotes over the phone.

    3 will blow in cellulose up to R-49 (on top of R-19) for $$ to $$$$

    1 apply foam to the underneath side of the roof for $$$$$$

    1650 ft2
    Ridge Vents
    Soffit vents

    Nothing outta the ordinary

    Your thoughts, IF THIS WAS YOURABODE, WHICH WOULD YOU PICK??????

    Sidebar: what about using both?

    Thanx once again!!!!

    RS

  2. #2
    Join Date
    Jun 2001
    Location
    DFW
    Posts
    684
    IF the duct work and / or air handler is in the attic, foam the underside of the roof and seal the ridge and soffit vents.

    Otherwise, take the existing insulation out, add 1" of foam to the top of the ceiling to air seal it, and add your R49 cellulose on top of that.

  3. #3
    Join Date
    Mar 2003
    Location
    PA/DE area
    Posts
    1,535
    i was in an attic today 95 degrees outside and spray foam on rafters of roof and attic was 72 degrees,it would have been hot as heck if it was fiberglass up there.It has to be better R vaule.
    It's NOT the BRAND,it's the company that installs it!!!!!

  4. #4
    Join Date
    May 2007
    Location
    Naples, Fl
    Posts
    889
    100% foam here in Southwest Florida.

  5. #5
    Join Date
    Jun 2001
    Location
    DFW
    Posts
    684
    Quote Originally Posted by adrianf View Post
    100% foam here in Southwest Florida.
    Where the dew point is often higher than the indoor temperature, foam is the best answer. In that case, spray foam is the only answer for existing construction. For new construction, polyiso foam in 4x8 sheets can be used at less than half the price of spray foam.

  6. #6
    Join Date
    Jul 2008
    Location
    Rydal,Ga
    Posts
    84

    Rumo check out my page....

    Rumo.

    All foam anywhere... We do foam and cellulose and HVAC

    "Build it Tight Size it Right"

    There is no better $$$ spent than the roof !!!

    Go to my web page...... pick it up from my profile
    Attached Images Attached Images  

  7. #7
    Join Date
    Jun 2008
    Posts
    63
    I do love the concept, if not the price, of a sealed attic. Cool, clean, bug and bat resistant, easy to see plumbing, wiring, etc.

    But how would you find a small roof leak prior to it becoming a major problem?

    What are the considerations for a gas furnace in a sealed attic?

  8. #8
    Join Date
    Mar 2008
    Posts
    205

    Yeah the duct work is up there

    Quote Originally Posted by paul42 View Post
    IF the duct work and / or air handler is in the attic, foam the underside of the roof and seal the ridge and soffit vents.

    Otherwise, take the existing insulation out, add 1" of foam to the top of the ceiling to air seal it, and add your R49 cellulose on top of that.
    but the air handler is in a closet. I'm really thinkin' about goin' whole hog w/this and get the foam + cellulose blown in.

  9. #9
    Join Date
    Mar 2008
    Posts
    205

    Man that's nice

    Quote Originally Posted by kenny mac View Post
    Rumo.

    All foam anywhere... We do foam and cellulose and HVAC

    "Build it Tight Size it Right"

    There is no better $$$ spent than the roof !!!

    Go to my web page...... pick it up from my profile
    do you have any insulation below?

  10. #10
    Join Date
    Jul 2008
    Location
    Rydal,Ga
    Posts
    84

    KES Hybrid System

    Quote Originally Posted by RomulanSpy View Post
    do you have any insulation below?
    I came up with the KES HYBRID SYSTEM about 10 years ago which is a flash coat of closed cell and capped off with cellulose... it don't get no better wall system............
    Then about 2" under the slab and about 4" on the roof and you can predict your Manual J will come in about 2000 sqft per ton....................

    Check out the attachment
    Attached Images Attached Images

  11. #11
    Join Date
    Mar 2008
    Posts
    205

    Impressive

    Quote Originally Posted by kenny mac View Post
    I came up with the KES HYBRID SYSTEM about 10 years ago which is a flash coat of closed cell and capped off with cellulose... it don't get no better wall system............
    Then about 2" under the slab and about 4" on the roof and you can predict your Manual J will come in about 2000 sqft per ton....................

    Check out the attachment

    wished your KES could make it up to the Magnolia State.

  12. #12
    Join Date
    Mar 2003
    Location
    PA/DE area
    Posts
    1,535
    With we could go with 90% AFUE in attics
    It's NOT the BRAND,it's the company that installs it!!!!!

  13. #13
    Join Date
    Dec 2002
    Location
    Arizona
    Posts
    4,375
    Quote Originally Posted by kenny mac View Post
    Then about 2" under the slab and about 4" on the roof and you can predict your Manual J will come in about 2000 sqft per ton....................

    Check out the attachment
    Maybe, with no windows!

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