Recent Comments and Answered Questions on Green Building Advisor

  • Martin Holladay | Feb 19,2018 06:58 AM EST
    Vissu, Step one to designing a heating system -- or specifying a furnace -- is to perform a heating load calculation. Here are links to articles you should read: Who Can ...
  • Martin Holladay | Feb 19,2018 06:56 AM EST
    Kevin, You have posted this question twice. The answers to your questions appeared on your other posting. Here is the ...
  • Martin Holladay | Feb 19,2018 06:51 AM EST
    Alex, The answers: 1. Yes, exterior rigid foam will help. 2. Thick foam is better than thin foam, but even 1 inch of rigid foam will reduce the chance of interior condensation. 3. I would ...
  • Martin Holladay | Feb 19,2018 06:45 AM EST
    Jake, I'm sorry that my response was short. I wish you the best of luck. I'm a big believer in solving ice dam problems by installing exterior foam, and I know that homeowners have to wait for ...
  • Martin Holladay | Feb 19,2018 06:42 AM EST
    Mike, Walter is right. The standard solution is to line your flue with a stainless-steel liner. When it comes to air sealing, it isn't rocket science -- just ordinary crack-sealing. Buy some ...
  • Martin Holladay | Feb 19,2018 06:38 AM EST
    Kevin, The consensus seems to be that electric hand dryers are a little cheaper, and probably more environmentally friendly on a life-cycle basis, but that paper towels are better at leaving your ...
  • Walter Ahlgrim | Feb 19,2018 12:31 AM EST
    If you want to use the least energy dry your hands on your pants. Walta
  • Walter Ahlgrim | Feb 19,2018 12:23 AM EST
    Find a good local installer and follow his advice. In most cases a 92% + furnace makes sense. Walta
  • Walter Ahlgrim | Feb 19,2018 12:14 AM EST
    Generally it makes more sense to air seal and insulate the walls. Because it will require 75% less materials and the exterior wall will have fewer penetrations than the ceiling. If somehow you did ...
  • Walter Ahlgrim | Feb 18,2018 11:48 PM EST
    Looking at your photos I think you have 2 problems. I do think you need a SS liner. The reason you do not have is because the manufacture of your furnace only recommended a liner instead of ...
  • Malcolm Taylor | Feb 18,2018 11:37 PM EST
    Thanks, that's very kind of you. I take much more than I give here - which must be apparent after reading contributions like the one above.
  • andrew c | Feb 18,2018 10:36 PM EST
    I appreciate your frequent contributions to GBA. I really appreciate your writing.
  • Malcolm Taylor | Feb 18,2018 09:30 PM EST
    The argument I make to my wife when I am using my jeans instead of a napkin is that it is the greenest solution. She, and most others, seem unconvinced.
  • Alex Stanton | Feb 18,2018 09:20 PM EST
    How effective would adding exterior foam board insulation on the outside of the stem wall? How much would it take to make a difference and how far down from slab would it have to extend to be ...
  • Jake Rabe | Feb 18,2018 08:23 PM EST
    I definitely appreciated the advice Martin. The problem, as stated, was limited time and experienced installers. Also the aesthetics and additional work (some said removal of all gutters) needed ...
  • Mike McLaine | Feb 18,2018 07:35 PM EST
    Martin, thanks for the prompt reply. Read it, makes sense. Previous owners upgraded to a high efficiency furnace, so between the shorter cycling times and my own energy saving improvements you ...
  • KEVIN ZORSKI | Feb 18,2018 07:15 PM EST
    UNRELATED, BUT WAS PONDERING TODAY IN A PUBLIC RESTROOM: WHAT'S MORE GREEN, TO DRY YOUR HANDS, THE ELECTRIC BLOWER OR THE PAPER TOWEL? ANY THOUGHTS FROM ANYONE?
  • Malcolm Taylor | Feb 18,2018 06:58 PM EST
    Michaelba, If the boxes are mounted directly to the siding, you can unscrew them and use a 4" hole saw to allow them to be re-mounted to the sheathing underneath. You can also just use ...
  • Dana Dorsett | Feb 18,2018 05:49 PM EST
    At 2" most common densities of EPS would not meet the NBC code definition of "vapour barrier" (which is 60 ng/Pa-s-m2 , just over 1 US perm = 57 ng/Pa-s-m2 ) without a facer of some type. Unfaced ...
  • Dana Dorsett | Feb 18,2018 05:33 PM EST
    IRC 2015 code minimum in your area with the foam on he exterior of a block wall would be R4. That could be 1" or more of EPS, or 3/4" or more of polyisocyanurate. ...
Register for a free account and join the conversation


Get a free account and join the conversation!
Become a GBA PRO!