Washington Park Residence

The home’s seeming simplicity belies its technical complexity.

In-progress installation of vegetated green roof membrane.

The home’s exterior elements include cast-in-place concrete walls, steel-sash windows, and green roofs.

A re-circulating water feature spills continuously over the exterior deck’s view edge.

Seattle, Washington
 Client:  Sullivan Conard Architects
 Dates of Service:  2008-2010

Project Summary:  This home’s outward elegance and simplicity belie its technical complexity.  Sub-grade interior spaces occur below exterior water-features and under paved exterior balconies, requiring meticulous design and execution of various waterproofing systems.  Light-weight vegetated “green roofs” cap the home’s many roof areas.  Seemingly monolithic exterior concrete walls actually incorporate both rigid insulation and integral waterproofing and drainage systems to limit heat loss as well as to provide a high degree of infiltration resistance.  Wood-clad exterior walls similarly contain drainage cavities for optimum weather-integrity.  Moment-resistant steel frames combined with narrow-profile steel-sash windows maximize expansive mountain-and-lake views. 

PL:BECS Services:  PL:BECS consulted to the architect in the design and selection of all enclosure systems, including sub-grade drainage and waterproofing; green-roof assemblies; wood-clad exterior walls; composite insulated cast-in-place concrete walls, and related elements.

PL:BECS also provided on-site assistance to the general contractor, Lockhart-Suver LLC, during the initial construction phases, to assure that the sub-grade waterproofing, composite concrete walls, and membrane-capped vegetated roofs were properly installed.