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G. Crabtree Home Building
What Makes Our Homes Green
 Lot Design: Preparation and Development

  • Establishing a team that is educated on green building practices

Protect the Land

  • Conserving natural resources.
  • Maintaining wildlife habitat
  • Conserving existing onsite vegetation
  • Planning on placing the house in the ideal place on the lot.  Taking into consideration protection of the natural resources/areas during construction.
  • Minimizing soil disturbance and erosion.  Scheduling construction to minimize exposed soils.  Marking off the area to be protected during grading and construction.
  • Installing and maintaining sediment and erosion controls.
  • Minimize impervious surfaces
  • Limiting use of grass, selecting native or regionally appropriate vegetation

Resource Efficiency

  • Creating an efficient home floor plan
  • Right sized headers or insulated headers
  • Eliminating headers from non load bearing walls
  • Installing ladder blocking at interior-wall-to-exterior-wall intersections.
  • Providing covered entries
  • Installing perimeter drain for all crawl spaces
  • Installing gutter and downspout system
  • Diverting surface water away from house
  • Using recommended-sized roof overhangs
  • Developing and implementing a construction waste management plan that is posted on jobsite
  • Recycling construction waste offsite
  • Using recycled content building materials
  • Using siding made of composite material (Hardiplank) conducive to mixed humid climate. Siding treated with EPA approved borates.
  • Using exterior trim railings and columns made of rot resistant material, enhances durability.
  • Using bamboo floors in main suite
  • Using sustainable carpets

Energy Efficiency

  • Tested by 3rd party for certification for Energy Star
  • Size space heating and cooling system & equipment
  • Low E Energy Star Windows
  • Higher insulation R-values
  • Continuous insulation on exterior wall
  • Continuous insulation on cathedral ceiling.
  • Incorporate air sealing package to reduce infiltration
  • Used Energy Star rated windows.
  • Energy Star rated HVAC designed for efficiency & performance verified by certified technician or third party
  • Size, design, and install duct system using ANSI/ACCA Manual or equivalent.
  • Verified performance of the heating/cooling system.
  • Energy Star gas furnace
  • Heat pump efficiency 8.0-8.9HSPF
  • Sealed ducts, plenums, and equipment to reduce leakage. Used mastic. No panning joists. 
  • Used advanced framing techniques
  • No ductwork in building cavities  
  • No ductwork in exterior walls
  • Ducts protected during construction
  • Installed return ducts or transfer grilles in every room having a door except baths, kitchens, closets, pantries, and laundry rooms
  • Energy Star ceiling fans.
  • Energy Star exhaust fans in all bathrooms, with humidistat, ducted to the outside
  • MERV 11 air filters
  • Garage sealed off from living space
  • Used Compact Fluorescent Lights light bulbs
  • Third party testing on all equipment
  • Energy Star rated Rinnai tankless whole house gas water heater
  • Energy Star dishwasher
  • Exterior doors have a minimum rating of R-5
  • Used proper blocking and insulation techniques to effectively seal off living space over garages
  • Insulated garages and garage doors that are an integral part of home adjacent to conditioned space.

Water Efficiency and Quality

  • Water efficient shower heads in every bathroom
  • Water efficient faucets
  • Low flow toilets  (1.6 gallons)
  • Tankless whole house gas water heater
  • Energy Star dishwasher

Indoor Environmental Quality

  • Direct vent sealed-combustion gas fireplace
  • Direct vent water heater
  • Vented kitchen range exhaust to the outside
  • Exhaust or supply fans
  • Control bathroom exhaust fan with a humidistat
  • Verified all exhaust flows (fans) meet design specifications
  • Garage sealed off form living space
  • Used two coats of paint in garage walls that adjoin living space to improve air barrier
  • Masked HVAC outlet during construction and vacuumed before turning on systems
  • Installed MERV 11 air filters
  • Installed Carbon Monoxide detectors near all combustion appliances or areas
  • Used moisture resistant carpet padding
  • Used moisture resistant tile backboard
  • Protected unused moisture-sensitive materials
  • No asphalt paving within 50 feet of home
  • Used low VOC paint
  • Used low VOC sealer on floors

Provide Homeowner with Green Operational and Maintenance Manual

  • Each home comes with a detailed manual with local information on maintaining and operating a green home

Global Impacts

  • Used recyclable carpets
  • Used low VOC paints
  • Used low VOC sealer on floors
  • Received Sustaining Donor Award from the Durham Community Land Trustees for long time support of affordable housing.
  • Regular contributor to Habitat for Humanity, Preservation Durham, Durham Crisis Response Center and other nonprofits that provide housing and hope for our neighbors.
  • Business sponsor for Ellerbe Creek Watershed Association, the environmental group that takes care of the watershed where our office is located.

Click Here to visit G. Crabtree Home Building’s website.