Recent Q&A

• Insulating Rim Joists With Foam and the Problem of Termites

  I'm not sure if this would fit better 'Energy Efficiency and Durability' category, but I have a few questions about using foam to insulate rim joists. From an air-sealing and…

• Interior French drain — wall detail

  We're installing an interior french drain to address water issues. The grading slopes away from the house and all down spouts are routed 10+ feet away from the house. We…

• Insulating second floor band joists from above

  A another question led to discussion of band joist insulation, but I have more specific questions that I think warrant a new topic. I'd like to insulate the second floor…

• Insulation and mechanical upgrades

  We recently purchased a 1500 square foot colonial outside of Philadelphia. I'd like to triage energy upgrades for this house and establish a long-term, holistic plan. We're in climate zone…

• PV and EMF

  I hope the title of this post isn't provocative, but I would like to ask an earnest question about photovoltaics and magnetic fields. The link below connects to a study…

• Mixed-humid insulation recommendations

  I've read a great deal about building science and energy-efficient building practices. This site is a great resource. I think I understand the theory, but I have a few questions…