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Green Building Techniques

  • Question & Answers

    How to Stop Capillary Action Beneath Footings

    Hi, I'm going to monopour my foundation walls using form a drain and ICF foundation walls. What product can I use to stop capillary action below my footing? I'm thinking…

  • Question & Answers

    Opinions on this Monolithic Slab with Interior Edge Insulation Detail

    Does the code approve of a monolithic slab with interior (inside the concrete) foam edge insulation? See the attached graphic. The idea is to be able to deal with termites…

  • Question & Answers

    Vented Cathedral Roof Insulation Retrofit with Exterior Rigid Foam

    Hi there, First, thanks for the tremendous amount of information shared here, that really helps! Intro: I'm renovating a 1966 house in Quebec, Canada (ASHRAE climate zone 7A). The roof is currently subject…

  • Question & Answers

    New Approach to Insulating a Low-Slope Roof

    Regarding Josh Salinger's article "a new take on insulating a roof" in issue 299 of Fine Homebuilding.  I am in the process of selecting the envelope details for a new…

  • Question & Answers

    Insulating an attic ceiling

    Hello all,As mentioned in a prior post, I am looking at getting a heat pump installed in my house. Although I have been trying to get the heat pump contractors…

  • Question & Answers

    Wing Insulation for Frost-Protected Shallow Foundation

    Beginning construction of a two story garage/home office, with 600 SF apartment above. (Plans for permitting go to the city early next week). I'm going with a shallow frost protected…

  • Question & Answers

    Using a Sealed Crawlspace for Return/Supply Air Ductwork

    Sealed crawlspace, Air handler in the space.  Why don't I use the crawlspace as a plenum, either return or supply air?  Seems it woudl be more efficient, options for easier…

  • Question & Answers

    Rigid foam with metal roof and cellulose?

    Hi have an old carriage barn that was converted to liveable space in the upper catskill mountains, New York (climate zone 6a). It gets very cold (-4 degrees Fahrenheit baseline…

  • Question & Answers

    Transitioning an Air Barrier From Wall to Roof

    Hey all, Just a quick question...I was browsing the Detail Library and couldn't find what I was looking for...which is more a comment on me than on the incredible sections…

  • Question & Answers

    Sizing and Framing Applied Overhangs

    I'm working thru details on planning a continuous exterior insulation retrofit project in Zone 5, adding 6" of polyiso to the roof and 3" of polyiso to the walls (I've…