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Energy Efficiency and Durability

  • Question & Answers

    Insulation in an attic

    I am trying to insulate an attic room in a one hundred year old house.The roof rafters are 2x 4s that are actually 2 x 4,5 inches of rough cut…

  • Question & Answers

    Treatment of structural slab over conditioned space

    Hi, I am currently starting a build that included a portion of a building with a composite concrete deck over a basement conditioned space. As of our current design, we would…

  • Question & Answers

    Insulating 3rd floor living space w/slate roof

    We are in the early stages of renovating a 1906 brick four square in St. Louis. We are in climate zone 4. It has a slate roof that was newly…

  • Question & Answers

    Wet block walls and adding insulation

    Good morning, I've seen it said on this site by Martin Holladay and others that a block wall can stay wet for a century or something to that effect, but he…

  • Question & Answers

    ZIP R3 sheathing and interior insulation – climate zone 3

    General contractor that has also worked for design firms in the past. I am in the process of designing/ building our "dream" home. I am aware of all of the…

  • Question & Answers

    Mixing exterior insulation types

    I'm in NH (CZ 6A) doing an exterior remodel on my 1950 ranch using 7 1/4" Larsen Trusses over a 2x4 structural wall.  The existing wall is standard drywall, 2x4…

  • Question & Answers

    Standing seam roof

    What is the recommended gauge for a standing seam metal roof?

  • Question & Answers

    Insulating a 1.5 story bungalow, climate zone 6A

    Hi All. We recently purchased a 1914 bungalow in coastal Maine (climate zone 6A). We are wrapping our heads around the scope of our remodel (the last upgrade was in…

  • Question & Answers

    Hard hvac duct installation

    Hi, MD clubs contractor installed new hard pipe ducts. Upon close inspection (peeling back the bubble wrap) it appears as though all the taps/take offs were installed with the flange…

  • Question & Answers

    Building greener on a budget: can we safely use mixed-size plywood?

    Hello Folks, We’re taking on the challenge of building our first home and garage in the Northeast (climate zone 6a), and doing our best to keep costs low while still…