Recent Comments and Answered Questions on Green Building Advisor

  • | Jun 25,2010 04:42 PM EDT
    Apparently, there are a great number of buildings, including high-rise, that have been built from pumice concrete. The compressive strength may be significantly reduced depending on the size and ...
  • | Jun 25,2010 04:29 PM EDT
    I’ve heard of a couple of builders in NM that build with PumiceCrete, for more info: 1. Scott Machardy in Taos, NM, machardy@newmex.com 2. LX&R Design, Abiquiu, NM, lxr_design@yahoo.com My ...
  • Jon Wyman | Jun 25,2010 04:24 PM EDT
    Michael, Thanks for the info - it is a good idea to reuse material and eliminate waste but I'm not a fan of OSB, especially in this kind of situation and with $7,000 worth of shingles. My cape ...
  • | Jun 25,2010 04:20 PM EDT
    What - my Yurt doesn't allow me to commute in my Hummer? http://tinyurl.com/242ubtu Of course you're right, but I would take it a good bit farther. Cities, by definition, are unsustainable: ...
  • James Morgan | Jun 25,2010 03:30 PM EDT
    I know we're all building nerds here but there's an aspect of this which gets way too little attention in this forum and it's nothing to do with the construction issues with which we all tend to ...
  • Alex Wilson | Jun 25,2010 02:07 PM EDT
    Steve, I did not include cotton, because I didn't have good embodied energy data on it. Having recently toured the UltraTouch factory near Phoenix, though, I would guess that the embodied energy ...
  • | Jun 25,2010 01:31 PM EDT
    Alex, This is a great article. Thank you. I wish you had included UltraTouch Cotton Insulation as well. Did you include that in your research?
  • | Jun 25,2010 12:34 PM EDT
    Humid climate roof ventilation is problematic only if the average outdoor RH is greater than the average attic RH, or at those times when outdoor RH is greater than attic RH. Attic RH without ...
  • John Brooks | Jun 25,2010 12:29 PM EDT
    Otherwise, moisture is removed by air convection, which is why attics traditionally were (and still are) ventilated.
    Unless you live in a Humid Climate.
  • John Brooks | Jun 25,2010 12:24 PM EDT
    You may notice that the google robot is posting an add for Bill's Book My favorite book!
  • John Brooks | Jun 25,2010 12:23 PM EDT
    Isn't there some statute of limitations on reviving old threads?
    Robert, I like to see old threads dredged up sometimes This one had some extra good comments by You ...
  • | Jun 25,2010 12:14 PM EDT
    Isn't there some statute of limitations on reviving old threads?
    what happens is that condensate will settle to the lowest point
    This, too, is a vast ...
  • | Jun 25,2010 03:25 AM EDT
    The issue is not whether condensation can form within insulation - what happens is that condensate will settle to the lowest point. Inside a roof space that usually means into the insulation. ...
  • | Jun 24,2010 08:24 PM EDT
    A representative of a major building material company shared some independent research he commissioned regarding the numbers of builders using rigid foam on exterior walls. Custom, spec and small ...
  • | Jun 24,2010 08:14 PM EDT
    I have no issue with flat roofs. I have a legitimate concern about OSB covered with an impermeable membrane. Thats a recipe for failure. Studies have supported that concern. A fibrous board ...
  • | Jun 24,2010 07:56 PM EDT
    Robert, In the SW states, we have been building “flat” roofs for hundreds of years mainly for the cost savings and the fact that we have very low rain amounts helps. ¼” or ½” slope is sufficient ...
  • | Jun 24,2010 07:15 PM EDT
    Robert... you are a zen green master for sure. I will let this go since you somehow feel your posts were different. Agree to disagree with yaa. Bruce is a wonderful person. Try to meet him ...
  • | Jun 24,2010 07:07 PM EDT
    Mike... Building Science Corporation. More available information than one could look into in a lifetime. No charge, they share, it is good for us. And they do so because the government is ...
  • Robert Car | Jun 24,2010 07:02 PM EDT
    Just found a technical bulletin from the SIP manufacturer regarding low slope roofs and fully adhered membranes: "Therefore, R-Control requires that a Dens-Deck (1/4” thickness or greater) or ...
  • | Jun 24,2010 06:59 PM EDT
    Good post Robert... Vermont sweetens the entry nicely. The DIY spreadsheet is also my conclusion. along with using the raters service.
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