Petersen Engineering gets a real kick out of radically reducing energy use

What You Need to Know


Unique about this building is that we added exterior insulation to a 200+ year old building within a strict historic district. The implementation of continuous air and thermal barriers that are entirely exterior to the post and beam frame reduces the peak heat loss by more than 80% without altering the appearance of the building. Visit and go to "blog" tab for more details. Petersen Engineering purchased the building in October 2009, moved its engineering operations in November 2009, received unanimous approval from the Portsmouth Historic District Commission in January 2010, and began construction February 2010. The exterior enclosure upgrades were completed July 2010. The building was occupied during the entire exterior renovation. Interior renovations are ongoing.

Efficiency or Sustainability Improvements:

Rigid Board Polystyrene Deep Energy Retrofit, Super Insulated Walls/ Roof

Open House Info:

-take Rt-95 or Rt-16 to Portsmouth traffic circle -take Rt-1 bypass North exit from circle -take 2nd exit titled "Maplewood Ave." -take right onto Maplewood Ave. -take first left onto Northwest St. 335 Maplewood Ave is located on the corner of Maplewood

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