Launch Slideshow

Name: Terra Numa, St. George, UtahSize: 2,772 square feetConstruction Cost: $658,000Completed: January 2011Certifications: National Green Building Standard-Silver, Energy StarHERS Rating: 59Architect: Gulch Design Group, Ivins, UtahBuilder: J2 Construction, St. GeorgeStructural Engineer:  Weaver Engineering, St. George

Terra Numa: Green Details & Products

Terra Numa: Green Details & Products

  • Name: Terra Numa, St. George, UtahSize: 2,772 square feetConstruction Cost: $658,000Completed: January 2011Certifications: National Green Building Standard-Silver, Energy StarHERS Rating: 59Architect: Gulch Design Group, Ivins, UtahBuilder: J2 Construction, St. GeorgeStructural Engineer:  Weaver Engineering, St. George

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    Name: Terra Numa, St. George, UtahSize: 2,772 square feetConstruction Cost: $658,000Completed: January 2011Certifications: National Green Building Standard-Silver, Energy StarHERS Rating: 59Architect: Gulch Design Group, Ivins, UtahBuilder: J2 Construction, St. GeorgeStructural Engineer: Weaver Engineering, St. George

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    Danny Lee

    Name: Terra Numa, St. George, Utah
    Size: 2,772 square feet
    Construction Cost: $658,000
    Completed: January 2011
    Certifications: National Green Building Standard-Silver, Energy Star
    HERS Rating: 59
    Architect: Gulch Design Group, Ivins, Utah
    Builder: J2 Construction, St. George
    Structural Engineer: Weaver Engineering, St. George

  • The Kohler 2.2-gpm Simplice pull-down faucet and Energy Star appliances from KitchenAid conserve water and energy in the kitchen. Recycled-glass tile from Walker Zanger provides a striking backsplash with desert-inspired hues. Kohler: 800.456.4537. www.kohler.com. KitchenAid: 800.422.1230. www.kitchenaid.com. Walker Zanger: 732.697.7700. www.walkerzanger.com.

    http://www.ecobuildingpulse.com/Images/tmpA912%2Etmp_tcm131-723222.jpg

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    The Kohler 2.2-gpm Simplice pull-down faucet and Energy Star appliances from KitchenAid conserve water and energy in the kitchen. Recycled-glass tile from Walker Zanger provides a striking backsplash with desert-inspired hues. Kohler: 800.456.4537. www.kohler.com. KitchenAid: 800.422.1230. www.kitchenaid.com. Walker Zanger: 732.697.7700. www.walkerzanger.com.

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    Danny Lee

    The Kohler 2.2-gpm Simplice pull-down faucet and Energy Star appliances from KitchenAid conserve water and energy in the kitchen. Recycled-glass tile from Walker Zanger provides a striking backsplash with desert-inspired hues. Kohler: 800.456.4537. www.kohler.com. KitchenAid: 800.422.1230. www.kitchenaid.com. Walker Zanger: 732.697.7700. www.walkerzanger.com.

  • LANDSCAPINGThe site design preserved 70% of the lots existing vegetation such as black sage, indigo, and creosote. The small amount of watering that is required for the yards drought-tolerant plants and treesincluding prickly pear, yucca, and Arizona rosewoodis controlled via a Rainbird drip irrigation system. Instead of turf, permeable crushed sandstone covers the ground and chat, a type of crushed granite, is used for planting beds instead of mulch. 800.724.6247. www.rainbird.com. ROOFINGThe PVC roof from IB Roof carries a Class A fire rating for flame resistance, has a life expectancy of up to 40 years, and is 100% recyclable. A foil-backed Energy Starrated Insulfoam radiant barrier, 2 inches of closed-cell spray foam, and 12 inches of cellulose up the roofs R-value to 50. It is prewired for solar panels. IB Roof Systems: 800.426.1626. www.ibroof.com. Insulfoam: 800.248.5995. www.insulfoam.com. INSULATIONBy relying on a mix of closed-cell spray foam and cellulose insulation, Joines saved $5,700 compared to using spray foam alone. The products he chose also take indoor air quality and material conservation into consideration. Demilecs Heatlok Soy, made of recycled plastic and renewable soy oils, is Greenguard Indoor Air Quality and Greenguard for Children and Schools certified. Formaldehyde-free blown cellulose from GreenFiber is SCS certified for a minimum of 85% recycled content, mostly post-consumer paper fiber. Demilec: 877.336.4532. www.demilecusa.com. GreenFiber: 800.228.0024. www.greenfiber.com.

    http://www.ecobuildingpulse.com/Images/tmpA90E%2Etmp_tcm131-723218.jpg

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    LANDSCAPINGThe site design preserved 70% of the lots existing vegetation such as black sage, indigo, and creosote. The small amount of watering that is required for the yards drought-tolerant plants and treesincluding prickly pear, yucca, and Arizona rosewoodis controlled via a Rainbird drip irrigation system. Instead of turf, permeable crushed sandstone covers the ground and chat, a type of crushed granite, is used for planting beds instead of mulch. 800.724.6247. www.rainbird.com. ROOFINGThe PVC roof from IB Roof carries a Class A fire rating for flame resistance, has a life expectancy of up to 40 years, and is 100% recyclable. A foil-backed Energy Starrated Insulfoam radiant barrier, 2 inches of closed-cell spray foam, and 12 inches of cellulose up the roofs R-value to 50. It is prewired for solar panels. IB Roof Systems: 800.426.1626. www.ibroof.com. Insulfoam: 800.248.5995. www.insulfoam.com. INSULATIONBy relying on a mix of closed-cell spray foam and cellulose insulation, Joines saved $5,700 compared to using spray foam alone. The products he chose also take indoor air quality and material conservation into consideration. Demilecs Heatlok Soy, made of recycled plastic and renewable soy oils, is Greenguard Indoor Air Quality and Greenguard for Children and Schools certified. Formaldehyde-free blown cellulose from GreenFiber is SCS certified for a minimum of 85% recycled content, mostly post-consumer paper fiber. Demilec: 877.336.4532. www.demilecusa.com. GreenFiber: 800.228.0024. www.greenfiber.com.

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    Danny Lee

    LANDSCAPING
    The site design preserved 70% of the lots existing vegetation such as black sage, indigo, and creosote. The small amount of watering that is required for the yards drought-tolerant plants and treesincluding prickly pear, yucca, and Arizona rosewoodis controlled via a Rainbird drip irrigation system. Instead of turf, permeable crushed sandstone covers the ground and chat, a type of crushed granite, is used for planting beds instead of mulch. 800.724.6247. www.rainbird.com.

    ROOFING
    The PVC roof from IB Roof carries a Class A fire rating for flame resistance, has a life expectancy of up to 40 years, and is 100% recyclable. A foil-backed Energy Star-rated Insulfoam radiant barrier, 2 inches of closed-cell spray foam, and 12 inches of cellulose up the roofs R-value to 50. It is prewired for solar panels. IB Roof Systems: 800.426.1626. www.ibroof.com. Insulfoam: 800.248.5995. www.insulfoam.com.

    INSULATION
    By relying on a mix of closed-cell spray foam and cellulose insulation, Joines saved $5,700 compared to using spray foam alone. The products he chose also take indoor air quality and material conservation into consideration. Demilec's Heatlok Soy, made of recycled plastic and renewable soy oils, is Greenguard Indoor Air Quality and Greenguard for Children and Schools certified. Formaldehyde-free blown cellulose from GreenFiber is SCS certified for a minimum of 85% recycled content, mostly post-consumer paper fiber. Demilec: 877.336.4532. www.demilecusa.com. GreenFiber: 800.228.0024. www.greenfiber.com.

  • WINDOWSDeeply recessed Energy Starrated aluminum windows from Eagle feature a U-value of 0.30 and a solar heat gain coefficient of 0.29. The low-E argon-filled units come with double weather-stripping, which helps to eliminate air and water infiltration while providing exceptional noise control, according to the company. 800.324.5354. www.eaglewindow.com.  LIGHTINGTo cut down on electric load, Joines uses high-efficiency lighting products whenever possible. For the Terra Numa project he speced Sylvania LEDs with 20 times the lifespan and 70% less energy consumption than incandescents. 800.544.4828. www.sylvania.com.

    http://www.ecobuildingpulse.com/Images/tmpA910%2Etmp_tcm131-723220.jpg

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    WINDOWSDeeply recessed Energy Starrated aluminum windows from Eagle feature a U-value of 0.30 and a solar heat gain coefficient of 0.29. The low-E argon-filled units come with double weather-stripping, which helps to eliminate air and water infiltration while providing exceptional noise control, according to the company. 800.324.5354. www.eaglewindow.com. LIGHTINGTo cut down on electric load, Joines uses high-efficiency lighting products whenever possible. For the Terra Numa project he speced Sylvania LEDs with 20 times the lifespan and 70% less energy consumption than incandescents. 800.544.4828. www.sylvania.com.

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    Danny Lee

    WINDOWS
    Deeply recessed Energy Star-rated aluminum windows from Eagle feature a U-value of 0.30 and a solar heat gain coefficient of 0.29. The low-E argon-filled units come with double weather-stripping, which helps to eliminate air and water infiltration while providing exceptional noise control, according to the company. 800.324.5354. www.eaglewindow.com.

    LIGHTING
    To cut down on electric load, Joines uses high-efficiency lighting products whenever possible. For the Terra Numa project he speced Sylvania LEDs with 20 times the lifespan and 70% less energy consumption than incandescents. 800.544.4828. www.sylvania.com.

  • INDOOR AIR QUALITYA 70-cfm Fantech ERV exhausts stale air from each bathroom and brings fresh, cooled air into the bedrooms, reducing the load on the homes air conditioning system. Polished concrete floors and walls finished with low-VOC Kwal paint also help maintain healthy indoor air. Fantech: 800.747.1762. www.fantech.net. Kwal: www.kwalpaint.com. BATHROOMsHelping to keep water use low are WaterSense-certified 1.5-gpm Eva lav faucets from Moen and Kohler Highline dual-flush toilets with Class Five flushing technology, which features a specially engineered water flow for powerful but efficient flushing performance. Moen: 800.289.6636. www.moen.com. Kohler: 800.456.4537. www.kohler.com.

    http://www.ecobuildingpulse.com/Images/tmpA90C%2Etmp_tcm131-723216.jpg

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    INDOOR AIR QUALITYA 70-cfm Fantech ERV exhausts stale air from each bathroom and brings fresh, cooled air into the bedrooms, reducing the load on the homes air conditioning system. Polished concrete floors and walls finished with low-VOC Kwal paint also help maintain healthy indoor air. Fantech: 800.747.1762. www.fantech.net. Kwal: www.kwalpaint.com. BATHROOMsHelping to keep water use low are WaterSense-certified 1.5-gpm Eva lav faucets from Moen and Kohler Highline dual-flush toilets with Class Five flushing technology, which features a specially engineered water flow for powerful but efficient flushing performance. Moen: 800.289.6636. www.moen.com. Kohler: 800.456.4537. www.kohler.com.

    600

    Danny Lee

    INDOOR AIR QUALITY
    A 70-cfm Fantech ERV exhausts stale air from each bathroom and brings fresh, cooled air into the bedrooms, reducing the load on the homes air conditioning system. Polished concrete floors and walls finished with low-VOC Kwal paint also help maintain healthy indoor air. Fantech: 800.747.1762. www.fantech.net. Kwal: www.kwalpaint.com.

    BATHROOMS
    Helping to keep water use low are WaterSense-certified 1.5-gpm Eva lav faucets from Moen and Kohler Highline dual-flush toilets with Class Five flushing technology, which features a specially engineered water flow for powerful but efficient flushing performance. Moen: 800.289.6636. www.moen.com. Kohler: 800.456.4537. www.kohler.com.

  • As part of a zoned heating and cooling approach, six high-efficiency 14-SEER Fujitsu Halcyon mini-splits are concealed above closets and behind return air grilles, while two Energy Starrated 15-SEER LG cassette units (one shown here) are mounted directly on the wall. The systems four compressors are located outside. Fujitsu: 888.888.3424. www.fujitsugeneral.com. LG: 800.243.0000. www.lg.com.

    http://www.ecobuildingpulse.com/Images/tmpA90B%2Etmp_tcm131-723215.jpg

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    As part of a zoned heating and cooling approach, six high-efficiency 14-SEER Fujitsu Halcyon mini-splits are concealed above closets and behind return air grilles, while two Energy Starrated 15-SEER LG cassette units (one shown here) are mounted directly on the wall. The systems four compressors are located outside. Fujitsu: 888.888.3424. www.fujitsugeneral.com. LG: 800.243.0000. www.lg.com.

    600

    Danny Lee

    As part of a zoned heating and cooling approach, six high-efficiency 14-SEER Fujitsu Halcyon mini-splits are concealed above closets and behind return air grilles, while two Energy Star-rated 15-SEER LG cassette units (one shown here) are mounted directly on the wall. The systems four compressors are located outside. Fujitsu: 888.888.3424. www.fujitsugeneral.com. LG: 800.243.0000. www.lg.com.

The breathtaking natural beauty of southern Utah’s Red Rock region makes it one of the country’s most picturesque places to live. But for designer Matt Marten and builder Jake Joines, building homes here requires not only an appreciation of the pristine environment but a healthy amount of respect for it.

While their clients love the region’s spectacular scenery, ethereal cloud formations, and awe-inspiring sunsets, Marten and Joines are more concerned with its blazing-hot summers, cold north winds, and fast-moving storms. Marten, the owner of Gulch Design Group, has spent 20 years exploring the nuances of the local microclimate and how to fine-tune his houses to respond to the harsh—and “moody,” he describes—conditions.

Combating the desert’s grueling temperature extremes—which range from 110-plus degrees F in the summer to the 20s during winter nights—starts with a well-thought-out approach to heating and cooling. For the Terra Numa custom home near St. George, Marten and Joines came up with a zoned system comprised of eight high-efficiency mini-split units with separate programmable thermostats. Thanks to this configuration, a room on the west side of the house can be kept cool even during the hottest part of the afternoon without compromising comfort in other, less sunny rooms.

This strategy cost about one-third more than a traditional HVAC system, Joines says, but will help keep heating and air conditioning costs remarkably low. In fact, the project’s green rater estimates that the home’s annual power bills will run about $328 for cooling and $377 for heating, about half that of a similar-size traditionally built home in the area.

The HVAC system is augmented by a flash-and-batt insulation system that combines two types of wall insulation—2 inches of Demilec spray foam followed by GreenFiber cellulose—to achieve R-28 at a lower price than spray foam alone. “Once we achieve an air barrier with spray foam, we fill the rest up with something less expensive,” Joines explains. He used the same insulation approach under the roof.

Also contributing to the home’s efficiency is its Southwestern-inspired design, which evokes the adobe dwellings of the Anasazi who once lived in the area. Large sections of double-framed walls allow for recessed windows and doors that emulate traditional adobe construction while providing room for extra cellulose insulation (up to 2 feet for R-50 in some areas). The single-level, ground-hugging layout—also favored by Pueblo builders—takes advantage of the earth’s insulating properties.

“The more of the home that can be in contact with the earth the less it’s going to vary in temperature,” Joines says.

To achieve the appearance of a natural adobe exterior, the builder used hard-coat Finestone Stucco and boosted R-value by installing StarRgard 1-inch insulated sheathing board between the stucco system’s water-resistive barrier and fiberglass lath.