A Brief History

The project entails repairing the building at 335 Maplewood Ave in a manner that meets both preservation and sustainability goals. The building is the new location for Petersen Engineering, a firm that has been located in Portsmouth since 1992, and specializes in sustainable building engineering. We intend for this project to showcase techniques & materials that promote both preservation and sustainability and intend to share all aspects of the project locally and regionally through open houses, presentations, industry tradeshows, case studies and publications. We foresee this project being a valuable educational tool to demonstrate that preservation goals need not be compromised by sustainability goals. We have teamed with Bruss Construction who we know from past collaborations has exceptional experience and expertise on projects with the dual goal of preservation and sustainability.

The project received approval by the Historic District Commission on January 6, 2010 with construction scheduled to begin early February 2010.

The projected peak heat loss reduction is 85%.


Monday, January 10, 2011

Finished Slab

Alright! The basement slab is done! This is great! It has been quite a journey to get to this point and it has been one of the most dramatic transformations that I have seen in this renovation.

The next big step in the basement is going to be to spray foam the walls. We anticipate this happening sometime this winter with no set date on the calendar yet.







The Site Structures guys found this Black Label Beer bottle while doing their slab pour prep-work. A quick Google search tells me that Black Label was one of the top 10 breweries in the US in the mid 1950's. Great find!


This is our sump pump pit located under the stairs. The current water level rests a few inches below the rigid insulation and is self governed by a pre-existing gravity drain located in the south east corner of the basement. We had the gravity drain exit inspected and it does not connected to the city sewer system. We suspect that it is simply a length of pipe that is full of cracks and holes that does a good job dissipating water down hill from our basement - kind of like a leach field does with a septic system.

If everything goes to plan, water should continue to drain itself and maintain this water level the way that it has has for the past 50-100-200? years. We don't know when that drain was installed. In the event that the gravity drain stops accepting water, we will (unfortunately) need to pump the water to daylight if it becomes a problem. So far we have not needed to pump anything. Heck, James pulled the pump right out of the sump pit!

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