The house at 335 Freyling Place in Michigan is the 300th Habitat for Humanity of Kent County to achieve the LEED Platinum certification. The 1,519 square-foot, two-story home was designed by Image Design of Grand Rapids, Michigan, and is currently occupied by Karen Libbette and her five children. The house has also received the GreenBuilt Michigan Gold certification and is ZeroStep and 5+ Energy Star certified. The home has a HERS Score 34.
Apart from that, this green building project was also used as a “green learning laboratory” for over 120 students at Grand Rapids Community College’s Leslie E. Tassell M-TEC and other departments, as well as several students from Ferris State University. In addition to that, the house was also built to blend in seamlessly with the neighborhood’s existing classic 1880s architectural style.
The house has a highly energy-efficient thermal envelope, which features Logix ICF Exterior walls, with an 18-inch thick insulation. The envelope was designed to maximize efficiency and minimize air leaks, and also features insulated foam blocks filled with concrete for the foundation. The interior was designed so as to maximize natural ventilation and uses interior materials such as concrete floors and countertops to capture and retain the sun’s heat.
With the goal of improving the air quality of the home, the designers used CertainTeed M2Tech Moisture and Mold Resistant Gypsum Board. This product has the ASTM D3273 score of 10 for mold resistance and the highest possible ASTM G21 score of 0 for mold resistance. The boards also have a less than 5% water absorption by weight after 2-hour immersion, as per ASTM C 473 test method.
The walls were built using advanced framing techniques and thee house also features a SIP Panel Roof and is pre-wired for photovoltaics. The home was fitted with Low E Jeld-Wen Energy Star windows, which are built using recycled and sustainable materials. The home also features radiant heat flooring, which delivers heat via infrared radiation directly to the people and objects in the room.