The pictures & results are in from my blower door test

mbcijim Posted By mbcijim, Jan 4, 2010 at 8:20 PM

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  1. mbcijim

    mbcijim
    Member 2.
    NULL
    

    Mar 10, 2008
    419
    0
    Loc:
    Schuylkill County, Pa
    A while back I did a blower door test on my house that was built last year. Guidelines call for/require 8 air exchanges per day. I had 12. I fixed a bunch of the problems, hopefully you guys can learn from my mistakes.

    Blue is cold air coming in the house, red is hot.

    Some pictures & what they are showing:

    Behind this wall is an outside wall hung lamp. With a hole drilled to run the electric through. Easy fix - a little spray in styrofoam
    [​IMG]

    This is showing an unsealed duct. The flex duct connects to the vent, but no tape was wrapped around it allowing cold air in.
    [​IMG]

    Drop down stairs to crawl space with no gasket installed (how they come)
    [​IMG]

    This is the most shocking to me. I have 20 of these in my house. They are completely covered with the blown in cellulose insulation and are the enclosed light recessed can units. The enclosure is worthless with just a few inches of insulation on top. It needs the full 12". I haven't fixed this yet, but plan to. The guy who did my test said they sell gaskets to fit in the light bulb part of the can. Anyone have any suggestions on where to get them? He said they are hard to find.
    [​IMG]

    A window not very well shut and no caulk around the wood structure & wood frame
    [​IMG]

    We never did figure out this one as this part of the house is actually underground outside.
    [​IMG]

    Another unwrapped duct:
    [​IMG]

    Moderator's - feel free to edit so the picture shows up in the post. I'm sorry, I don't know what I am doing wrong.
     
  2. sgcsalsero

    sgcsalsero
    Feeling the Heat 2.
    NULL
    

    Mar 15, 2006
    448
    1
    Loc:
    ClevelandRocks
    Thanks, blower door tests are only going to get more popular. 20 years ago people weren't demanding home inspections like they are now. I asked for utility bills when I was negotiating home purchase four years ago - the owners 'conveniently' didn't keep them - much to my detriment now.

    I had this test done two years in the dead of winter, maybe when it was 15 degrees out. I have plenty of trouble spots to keep me busy. If I recall correctly the calculated sq. in. of open space was around 177.

    If you don't mind me asking, what did the test cost you? Or if you bought/rented the blower kit what did it cost?

    I read this recommended book a couple years ago and maybe it's time to check out of the library again:
    http://store.taunton.com/onlinestore/item/build-like-a-pro-insulate-and-weatherize-bruce-harley-070649.html

    Actually, that is a good deal at $10.
     
  3. mbcijim

    mbcijim
    Member 2.
    NULL
    

    Mar 10, 2008
    419
    0
    Loc:
    Schuylkill County, Pa
    The going rate around here seems to be $400-$600. I had him do a bunch of other work for me so I don't know the cost 100%.

    I just wish I had people there fixing stuff as he was finding it. I think we fixed most (all) of what I can, but we could have did the work then had him test the fix.
     
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