TWO SISTERS – Net Zero energy

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TWO- SISTERS DUPLEX

This existing 1920 duplex rental unit was retrofitted to near Passive House standard. After running an economic analysis of remodeling it was decided that the economic investment was justified through increased rent and reduced utility costs. Much of the existing structure was severely decayed due to moisture infiltration and poor ventilation.

2 sis

PROJECT COMPLETED

Severely run down, the original building had the dubious distinction of containing zero insulation, no ventilation, 7 foot ceilings, aluminum single pane windows, and a single 2×4 frame wall separating the units. Needless to say, dramatic improvements were needed.  After investigation it was decided that the existing foundation was sound and a majority of the floor structure.

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SOUTHWEST CORNER – BEFORE RETROFITING

elevations
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Slab over wood framing

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Existing condition of floor