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  1. Replies
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    1,367

    The problem is the vapor barrier, You have a...

    The problem is the vapor barrier, You have a vapor barrier on the inside by using poly. The wall can't dry. You are getting a vapor drive from the bottom of the footer and that is probabky...
  2. To control humidity in the basement use foam...

    To control humidity in the basement use foam board on the walls. Do not use poly vapor barrier, as it will trap moisture and not let the wall dry. For the fish tank area use a dehumidifyer.
  3. Replies
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    1,367

    Unless you live in Minn., you should not use poly...

    Unless you live in Minn., you should not use poly on the inside of the wall. This prevents the wall assembly form drying. Take off the poly and repace with one of the new varying permeable...
  4. Replies
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    2,438

    Tundraotto--You are missing the point. The...

    Tundraotto--You are missing the point. The person who started this thread was worried about ice dams, not that he had ice dam problems. Why stick a hole in your roof that uses electricity and can...
  5. Replies
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    2,438

    Not trying to be a "harper" but pv's have never...

    Not trying to be a "harper" but pv's have never shown to save energy and usually increase energy use. Pv's are holes in the roof that use electricity, and cause problems. Its amazing how this myth...
  6. Replies
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    Keepitsimplestupid--Your analogy of a fan in the...

    Keepitsimplestupid--Your analogy of a fan in the middle of the room does not pertain to a fan on the roof decking plane or a gable vent fan. Your analogy of a window frame fan not pulling air from...
  7. Thread: attic insulation

    by uktra
    Replies
    17
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    1,826

    Johnsmitty---you didn't read what I said.

    Johnsmitty---you didn't read what I said.
  8. Replies
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    2,438

    Keepitsimplestupid--Wrong! Need to go back to...

    Keepitsimplestupid--Wrong! Need to go back to science class. If pressure is greater on one side of an opening air will go from high pressure to low no matter what size the hole is. Test after test...
  9. Replies
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    2,438

    newhomeboston---wrong! a fan will place a...

    newhomeboston---wrong! a fan will place a negative pressure in the attic. It will pull different amounts of air through any hole depending on the size of the hole. One cannot make the attic floor...
  10. Thread: attic insulation

    by uktra
    Replies
    17
    Views
    1,826

    Heat does not rise. Heat dissapates in any...

    Heat does not rise. Heat dissapates in any direction to a lower level of heat. Hot air will rise above lower heat air. Basements per square foot of surface tend to lose less heat to the...
  11. Replies
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    From what you have said, I think you are overly...

    From what you have said, I think you are overly concerned about a problem that won't happen. Ice dams are caused by heat transfer from the rooms below to the attic roof. This normally happens along...
  12. Replies
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    Better yet--get a whole house dehumidifyer to...

    Better yet--get a whole house dehumidifyer to handle the latent load and control humidity all year long.
  13. Replies
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    850

    You have to size heat pumps for both summer and...

    You have to size heat pumps for both summer and winter loads. 6 ton for your winter load is fine. For the summer load it is oversized. The solution that I use is a 2 stage system. The intial cost...
  14. Replies
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    814

    Fiberglass insulation is for conductive heat...

    Fiberglass insulation is for conductive heat loss. It will not stop air (convective heat loss). You must seal the holes from the attic to the rooms below, as well as having adequate insulation...
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    504

    Most energy auditors can provide this if they...

    Most energy auditors can provide this if they have the manual J software program. Just ask.
  16. Thread: Radiant Barrier

    by uktra
    Replies
    120
    Views
    23,519

    Ibanda---Quit worrying about the temperature in...

    Ibanda---Quit worrying about the temperature in the attic, and be concerned about the energy transfer from the attic to the rooms below. The best things you can do is seal all the holes from the...
  17. Replies
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    I have a hard time believing heating with Natural...

    I have a hard time believing heating with Natural gas in Texas is going to be cheaper than a two stage high seer heatpump even now, much less in the future. Natural gas production in North America...
  18. Thread: trane 15i or 19i

    by uktra
    Replies
    5
    Views
    1,893

    Baldloonie is absolutly correct. Here in...

    Baldloonie is absolutly correct. Here in Florida, humidity control year around is critical. Your home should be very tight (if the roof is airsealed properly--this is VERY important if you want the...
  19. You need to get an energy audit done. Call your...

    You need to get an energy audit done. Call your local utility and find the name of a person who can check the whole house. The exam should include a blower door test to see how much air leakage is...
  20. Thread: Foam Home

    by uktra
    Replies
    23
    Views
    1,817

    To design a energy efficient and comfortable home...

    To design a energy efficient and comfortable home with good IAQ, you need to take a "systems approach" to the home. This will provide the largest improvement from the least amount of building cost. ...
  21. Replies
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    17,112

    Pstu--the article in Home Energy also re-inforces...

    Pstu--the article in Home Energy also re-inforces why Lstiburek likes sealed conditioned attics!
  22. Pay to have an independant energy auditor/rater...

    Pay to have an independant energy auditor/rater do a load calc. Make sure that person performs a blower door test to check for air infiltration rate (every body else is just guessing-usually wrong)....
  23. Replies
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    17,112

    Number 1 is incorrect, number 2 is correct. That...

    Number 1 is incorrect, number 2 is correct. That is why even if you lower the attic temperature to the same as the outside the dominant energy transfer will still take place. There is no question...
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    17,112

    Yes, once temperatures decline that will happen. ...

    Yes, once temperatures decline that will happen. Radiant barriers in Texas in new construction ae cost effective, in existing construction it all depends on cost of install and how long you will be...
  25. Replies
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    17,112

    jdb52--Insulation does not "unlode heat". It...

    jdb52--Insulation does not "unlode heat". It just slows the heat transfer. There are only three ways heat can transfer in an attic assembly. 1. Radiant (the dominant method). 2. Conductive (hot...
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