Recent Comments and Answered Questions on Lakesideca Advisor

  • Martin Holladay | Jul 17,2018 05:12 AM EDT
    James, I assume that "Brian P" is Brian Post, the author of a series of GBA blogs. To learn more about Brian's project, read his blogs. The first one is "Building a Small ...
  • Martin Holladay | Jul 17,2018 05:07 AM EDT
    Alan, Q. "Do those shades give R-4 because of the foil reflection or because of the hollow core?" A. Because of both. Q. "Which would be the bigger component?" A. Roughly speaking -- an ...
  • Martin Holladay | Jul 17,2018 05:03 AM EDT
    Nick, What you end up deciding depends in part on your goals and your budget. If you can afford to install rigid foam over your entire roof, the results may end up looking better and being more ...
  • Martin Holladay | Jul 17,2018 04:52 AM EDT
    Walter, One engineer who got it right was Hamed Sadri, the SMA engineer who oversaw the project in St. Eustatius.
  • | Jul 16,2018 11:58 PM EDT
    Great info guys! I don't have much to add as I am still building my PGH in NH. Brian P- I would love to chat with you about your build and what you would and would not recommend in our exact ...
  • Alan B | Jul 16,2018 09:53 PM EDT
    @Martin, do those shades give R4 because of the foil reflection or because of the hollow core. Which would be the bigger component? @Dana. If visible light is the major component could i reduce ...
  • | Jul 16,2018 07:54 PM EDT
    Thank you all for the input and detailed answers. Dana do you suggest adding foam to the entire roof or just over the cathedral ceiling portion? Adding 3" foam + .5 sheathing will only leave about ...
  • Walter Ahlgrim | Jul 16,2018 07:16 PM EDT
    It seems impossible that a unity would install thousands of solar panels without consulting an engineer. This article should be calling out the engineers by name that stamped the plans for the ...
  • Dana Dorsett | Jul 16,2018 06:23 PM EDT
    There's a fairly high correlation to higher CO2 per capita on the red side of the red/blue divide, but it's not a simple as about "caring". Conservatives/Republicans are far more apt to be ...
  • Jason New | Jul 16,2018 05:40 PM EDT
    yes I also discovered the ridiculous cost difference up here in Canada between the rigid roxul and the batt roxul. See my other post where I then chose to put up regular Roxul R14 on the outside ...
  • Dana Dorsett | Jul 16,2018 05:06 PM EDT
    If my 50 million metric ton WAG is correct, the US military's greenhouse gas emissions would on the order of 1% of the US total, not 10%. (I guess I need more coffee on a Friday afternoon? :-) )
  • Dana Dorsett | Jul 16,2018 04:53 PM EDT
    Some really low GDP countries have effectively zero industry and zero fossil fuel emissions to boot, with extremely low CO2/GDP. But developing countries have greater GDP aspirations, which could ...
  • Martin Holladay | Jul 16,2018 04:41 PM EDT
    Nathan, Thanks for your comment. Indeed, the manufacturer of Boral TruExterior siding and trim products states that these materials are rated for ground contact.
  • Martin Holladay | Jul 16,2018 04:16 PM EDT
    Craig, Q. "Is this the best idea [building an insulated mechanical room around my attic furnace] or are there other options I should be exploring?" A. I'm not a fan of the idea of building an ...
  • Nathan Bean | Jul 16,2018 04:12 PM EDT
    An option not listed is the Boral TruExterior product line - it's a polyash composite that is rated for ground contact, is highly termite resistant, and has a much lower coefficient of expansion ...
  • Dana Dorsett | Jul 16,2018 04:07 PM EDT
    You can't safely put fiber batt insulation directly in contact with a CMU wall. Fiber insulation wicks moisture. If you have 3/4" of polystyrene insulation (the "Styrofoam" mentioned) it provides ...
  • Martin Holladay | Jul 16,2018 04:05 PM EDT
    Nick, Q. "Where the cathedral ceiling meets the attic, I will add 2-3 layers of polyiso to isolate the attic from conditioned space. This is the part I have not found much information on." A. ...
  • Dana Dorsett | Jul 16,2018 03:59 PM EDT
    Alan B: "Light in itself does have some heating value but i assume most of the heat gain is in UV/IR? Would this be accurate?" Not really accurate. It depends on the type of window & coatings, ...
  • Martin Holladay | Jul 16,2018 03:59 PM EDT
    Nick, Dana gave you a very comprehensive answer. The two red flags in your plan are the idea of installing fiberglass batts directly against CMUs (concrete blocks) -- that's generally ...
  • Martin Holladay | Jul 16,2018 03:51 PM EDT
    Striker, For more information on one of Dana's points -- the one about "With continuous insulation you can usually meet code on a U-factor basis at much lower R values than would be required for ...
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