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Residential

Walters Residence, Greenville, N.C.

Vinny Petraca of Tonic Design, Raleigh, N.C., designedwalters_residence the Walters residence in Greenville, N.C. Made up of two primary design components-bars and panels- the 4,700-square-foot residence features narrow bars composed of private spaces that branch out into the landscape to create courtyards, capture natural light, maximize natural ventilation and intersect to form a central volume of double-height public spaces. The kitchen, dining area, balcony and a loft look out towards the residence's stunning landscape.

The home is also energy-efficient as a structural system holds photovoltaic panels and perforated screens, which provide the home's energy, hot water needs and shade to alleviate heat gain. The house's site orientation maximizes the photovoltaic technology's potential.

The residence includes a number of other energyefficient features such as a geothermal HVAC system and a drip-irrigation system. However, the home's exterior garners the most attention with a mix of brick veneer, vertical cedar panels and VMZINC Flat lock wall panels in QUARTZ-ZINC from Umicore Building Products USA Inc., Raleigh. For this project, Umicore received three 2011 Metal Construction Association's Chairman's Awards for the "exceptional use of metal in innovative architectural designs" in the residential category. Tonic Construction of Raleigh served as the general contractor; Metal Worx, Pittsboro, N.C., was the installer; Southern Energy Management, Morrisville, N.C., installed the photovoltaic panels; and Allen Kelly & Co., Raleigh, was the HVAC system installer.

General contractor: Tonic Construction, Raleigh, N.C.

Architect: Tonic Design, Raleigh

Installer: Metal Worx, Summerville, S.C.

Photovoltaic installer: Southern Energy Management, Morrisville, N.C.

HVAC installer: Allen Kelly & Co., Raleigh

Metal wall panels: Umicore Building Products USA Inc., Raleigh, www.vmzinc-us.com,