Alameda seismic upgrade for ecoroof

The clients who owned this home in NE Portland wanted an ecoroof, but their existing roof would not support the additional load.
Manning Design + Construction designed and executed the full seismic upgrade for the unreinforced masonry two-car garage to accommodate an ecoroof. We hired an engineer to assess and document the existing building, then installed new shear walls and concrete footings to support new roof framing and the seismic load of the new ecoroof , which included 19 tons of ecoroof soil. Structural elements included concrete footings, shear walls with strap hold-downs and new roof structure (all new framing, sheathing), and new membrane and parapet cap flashing. To accommodate stormwater runoff, we diverted the water from the back of the house to a trench under the driveway and covered the drive with pervious pavers.

This was project was supported in part by funds from Portland’s ecoroof grant program.


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