In the spring of 2009, a real estate agent contacted Mark Fenelon, general contractor at Nashville, Tenn.’s Mossy Ridge Construction, to team and invest with her on the remodel of a historic Nashville home that had been vacant for a year. Eager to give the Nashville house an edge in an extremely challenging market, she wanted the speculative project to incorporate environmentally responsible features.

Fenelon had previously built the real estate agent’s house to LEED (Leadership in Energy and Environmental Design) standards when LEED for Homes was still in its pilot phase. In addition, his housing experience included other green standards such as Energy Star and EarthCraft, a green building certification program across six states in the Southeast tailored to address regional impacts such as high heat, humidity and temperature swings. The spec opportunity wasn’t lost on Fenelon, but banks weren’t eager to loan money in 2009.

“I had to put everything on the line to buy the house with the real estate agent but the house sold even before we finished it, and the green attributes were the biggest selling point,” Fenelon recalls. “When we started, nobody was doing green houses in the spec environment, but now 80 percent of the building permits here are in that arena – it’s completely boomed.”

Fenelon brought in chief manager Scott Wilson of Brentwood, Tenn.-based Scott Wilson Architect to design the remodel. The two met years before at a local conference sponsored by the Washington, D.C.-based U.S. Green Building Council and shared like-minded views on green home building.

Order from Chaos

The $490,000 project began with an unexpected turn when Fenelon discovered the walls were falling in. A 6-in. dip from the center of the ridgeline dented the roof, and walls devoid of footings perched on old stone foundations that had settled in one corner of the house.

The 1930s-era home was governed by the Nashville Historical Society, which mandated that as Mossy Ridge Construction made changes, it deconstruct the interior one floor at a time. Painstakingly, the contractor put in 13 new piers with beams to support the walls and carry the weight of the house. Haphazard renovations throughout the past 80 years created an odd series of shoebox rooms on different floor levels with no relation to each other and essentially required the team to gut the interior. Historic regulations demanded the exterior parts of the home visible to the neighborhood remain the same, so Wilson retained the original facade and two side walls and increased the home’s size from 1,700 sq. ft. to 3,300 sq. ft. out the back side.

“The home wasn’t comfortable, and other than the facade there was almost no character left to the house,” explains Wilson. “but the back had a nice yard with mature trees, which is unusual so close to town. I wanted to celebrate this advantage and create strong connections between the home’s interior and the outside.”

Wilson opened up the interior spaces and brought abundant daylight into the house through a two-story corner stair tower flanked by interior and exterior windows on each floor. A large doorway between the kitchen and the stairwell filters in natural light, and a breakfast area offers a view to the backyard. The stairwell also ushers light into the hallways, and the home’s new open plan creates visual connections to make the spaces brighter and more inviting. Low-emissivity glass windows grace every main-level space, even the closets.

Crafting Homeowner Savings

Distributing natural light throughout the home lowered electricity needs. Another design element that doubled as an amenity and means of energy reduction was dividing the living room and breakfast area with a fireplace. The fireplace is made of Icelandic volcanic stone which has high insulating values, radiates heat better than traditional masonry and provides heat to both spaces.

A new HVAC system had been installed two years prior to the remodel, so in the spirit of sustainable reuse, the team removed, stored and refurbished it to service the original portion of the house. The home’s addition was equipped with a high-efficiency HVAC system including heat recovery units that preheat outside air using exhaust heat from the house. The team conducted testing and balancing to determine how much insulation to incorporate, and the calculated addition of soy-based spray foam insulation alone dropped the structure’s energy usage by 40 percent.

Although the renovation doubled the home’s size, the team achieved a 28-percent reduction in energy use resulting in an energy utility cost savings of $550 per year. The new homeowners save on water bills as well, thanks to low-flow plumbing fixtures and a 96-percent-efficient water heater with a recirculation system that provides instant hot water.

Like-minded Values

Wilson views every building as a system where each item affects others in the environment. He asserts that having a builder who shared his passion went a long way, especially when it came to keeping costs in check. For example, the original design of the stairwell was taller with more glass and topped with a flat roof.

“Mark understood what the tower brought to the project and embraced the concept but he explained that it was pushing us over budget,” Wilson says. “We collaborated to figure out which elements drove up the expense. Once I understood which features cost too much, I was able to reconfigure the tower to a shorter structure with fewer windows and a sloped shingled roof to make it work for the budget and meet the green design intent.”

Everything that went into the house followed LEED criteria. Homeowners benefit from better indoor air quality through features like heavy rubber membrane seals in the crawl space to keep the moisture down, sealed piers at the perimeter walls to prevent moisture intrusion and mold, and dehumidifiers in the basement to remove incidental moisture. Because an automobile can outgas for 45 minutes after it’s turned off, Wilson detached the garage to separate the fumes from the house. Operable windows and a fresh-air ventilation system circulate outdoor air throughout the house.

Materials were locally and regionally sourced, and the team educated subcontractors in on-site recycling efforts. They also created a new demand for green building materials which influenced suppliers.

“We told one of our suppliers that if we are going to do business together we would need Forest Stewardship Council-certified wood. Now, that’s practically all they sell. And suppliers are better engineering deliverable packages for us with perfect cuts so there’s no waste,” explains Fenelon. “At first, a lot of companies pushed green building aside but now they are totally embracing it.”

The Nashville home has already received Energy Star Certification, and EarthCraft certification is pending. Fenelon believes in obtaining third-party certifications to verify his green building claims and assure owners that the homes will use less energy, have less impact on the environment and require less maintenance than conventionally constructed homes.

“Over the life of the building, the initial structure is only 20 percent the cost of the building, which shows that building a home is just the beginning – maintenance and repairs are a big part of the long-term equation,” says Wilson. “With the increased interest in green building practices and our economic situation, other builders are now responding to the demand for smaller homes built with better materials and higher overall quality to offer benefits over the life of the home.”

Fenelon wants to leave a worthy legacy. “We are trying to build something that will last for 100 years. I want my daughters to drive by this house when they are 70 years old and proudly say, ‘My dad built that.’ We are leaving behind landmarks of ourselves,” he says.

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