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  1. #14
    Join Date
    Feb 2003
    Location
    Huntsville,AL
    Posts
    4,125
    what do you think the word 'ALL' includes | excludes???
    harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!

  2. #15
    Join Date
    Feb 2007
    Location
    18951
    Posts
    1,593
    Quote Originally Posted by cem-bsee View Post
    no-
    the secret to ALL insulation is the entrapment of air -- then having small pockets of air to prevent transfer by convection

    if you crush the fiberglass bats, you change the R value!
    Silly me, I always thought air (or gas or liquid) facilitated the convection process. I never knew air prevented or slowed the convection process. I always thought air only slowed or prevented the conduction process.

    Quote Originally Posted by cem-bsee View Post
    what do you think the word 'ALL' includes | excludes???
    So how much air is actually inside spray foam?

  3. #16
    Join Date
    Jun 2007
    Location
    Metro St. Louis
    Posts
    181
    Quote Originally Posted by jaymay75 View Post
    Studs are pretty good as I framed everying myself. The lumber that came from Lowes was excellent. Very, very straight lumber. Was kinda unbelieveable
    Who did you pay off for that? Seems any board I get from HD or Lowes is for building round houses with curved walls.

  4. #17
    Join Date
    Feb 2007
    Location
    18951
    Posts
    1,593
    Quote Originally Posted by Waterloo View Post
    Who did you pay off for that? Seems any board I get from HD or Lowes is for building round houses with curved walls.


    That's pretty funny, actually I found the same thing as jayman did. My Lowes sells pretty straight 2 x 4s.

  5. #18
    Join Date
    Jul 2002
    Posts
    79
    Home Depot lumber is absolute crap. But the Lowes lumber that we get around here is amazing good. (Pittsburgh) I framed my whole house and maybe threw away 2 2x6's. The floor joists were awesome. Dead on straight and no bows.

    was pretty shocked.

  6. #19
    Join Date
    Jul 2002
    Posts
    79
    BTW - My lowes rents a tow behind blower that is pretty commercial. I've decided to do the cellulose insulation everywhere and do it myself.

    I'm either going to cheesecloth the walls and blow it in, or hang the drywall nad then blow it in.

    I was quoted $4k for Cellulose insulation around here, which is insane.

    I'll do it myself for about $800

  7. #20
    Join Date
    Apr 2004
    Posts
    420
    Quote Originally Posted by bobb25 View Post
    So how much air is actually inside spray foam?
    Millions and millions of tiny little bubbles no? Taking together, there's quite a bit actually. Although the gas isn't atmospheric air, the principal of resistance to thermal migration is the same.

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