Recent Q&A

• Log homes and Massachusetts Energy Code?

  I have a client that would like me to do a HERS rating on a new construction log home in Massachusetts. I am concerned that the home may fail the…

• ERV and HRV efficacy requirements under 2015 IECC code

  In the IECC 2015 table R403.6.1 it lists In-line fan must have a efficacy of 2.8cfm/watt, is that the requirements we would use for whole house mechanical ventilation units such…

• Foil or not on exterior insulation?

  On a existing house climate zone 5 we are removing the exterior stucco and adding R-5 exterior insulation, plywood sheathing, Blueskin and cedar shingles. Would you recommend the exterior insulation…

• Properly balanced ventilation system

  Concerning a one year old home with all above grade walls and roof sheathing insulated with open cell spray foam and basement interior foundation insulated with closed cell spray foam…

• Sloped ceiling insulation

  In climate zone 5 we have renovation of a cape home and a suggested sloped insulated roof design as following: Soffit to ridge ventilation with baffles the entire way. Blown…

• Improving the insulation in a closed roof cathedral ceiling.

  On a closed roof cavity which currently is insulated with poorly installed fiberglass batts: If I pull out the fiberglass insulation, can I insulate with dense-packed cellulose with no roof…