NOVEMBER 2016 – Net-Zero Energy Home Completed!
Leadership in Energy & Environmental Design (LEED) is one of the most popular green building certification programs used worldwide. Developed by the non-profit U.S. Green Building Council (USGBC), it includes a set of rating systems for the design, construction, operation, and maintenance of green buildings, homes, and neighborhoods. Platinum certification is the highest designation for LEED residential homes.
The National Green Building Standard (NGBS) is the only green building rating system for homes and apartments approved by the American National Standards Institute (ANSI). NGBS provides independent, third-part verification that a new or remodeled home is built to achieve high performance in six key areas: Site Design, Resource Efficiency, Water Efficiency, Indoor Environmental Quality & Building Operation and Maintenance. Emerald certification from NGBS is highest designation for a new home.
October 27, 2016
C-TEC’s Net-Zero Energy Model Home – Ribbon Cutting/Open House
Rain Garden View – September 2016
Monitoring and Automatic Logic Controls
Summer 2016 Work – Ventilation System
May 2016 – BT student and instructor installing kitchen cabinets
April 2016 – Recycling waste material as much as possible
March 2016 – Installing Sub-floor and flooring
March 2016 – BT students Installing window trim
Ready for Green Energy Ohio (GEO) Solar Tour 2015 – Saturday, October 3, 2015
After Solar PV array installation
Before Solar Photovoltaic Array Installed
Spring 2015 – Digging the Rain Garden
Basement Floor install – Stego Wrap
The Net-Zero Energy house is progressing as the siding and electric are being installed.
Building Trades senior Jeremy Boyd installing siding on the Net-Zero Energy house.
October 2014 – Building Trades seniors dig ditch for the water line and
install a copper water line.
Electricity students have been out working on the Net-Zero house. Building trades students dug a trench for electricity students to run underground conduit, and it is now complete and ready for backfill after the inspection.
May 2014 – Roof
May 2014 – Windows and Doors
May 2014 – Duct Work
April 2014 – Geothermal well drilling and framing work
Another green sustainable framing technique is the use of engineered, laminated lumber for bearing headers and beams. The use of smaller pieces of wood joined by glue and placed under extreme pressure allows for sustainable use of the resource.
Rain, Snow, or Shine – Net Zero Construction continues. Designers have employed time honored engineering principles to allow for highly efficient use of small pieces of wood where historically large pieces were used in the past. Two examples of this are utilized in our sustainable Net Zero project. As you can see from the pictures all the horizontal planes (floors and roof) utilize open web trusses as opposed to monolithic dimensional lumber. This allows for the use of not only smaller pieces of wood to create an engineering effect but less of them on a volume basis than dimensional lumber.
All builders are happy when the infrastructure comes out of the ground and transitions to framing. Wood is the primary choice for our sustainable Net Zero efforts as trees are infinitely renewable with considerate and proper harvest techniques. Wood is durable when proper efforts are made to preserve its integrity and protect it from decaying forces of nature such as water and insect intrusion. Wood provides moderate thermal characteristics although not sufficient for the building envelop specifications necessary for this net zero house. Finally, wood is wonderful with which to work as it is malleable and can be made to conform to many geometries and many purposes all with material and labor cost effectiveness.
As you can see in the photos a continuous layer of Naduras peel and stick waterproofing membrane was applied to the entire exterior to seal the foundation from the deleterious effects of water/ice and being underground.
C-TEC in partnership with Nudura/Holdfast also utilized an ICF (Insulated Concrete Form) foundation form system to define the geometry of the basement walls and hence the footprint of the house. These forms then remain after the concrete is poured as part and parcel of the residence providing an exemplary foundation wall insulation with claimed values of up to R-50, an amazing accomplishment for an area of the house which often bleeds energy to the exterior especially in our Central Ohio (5200-degree day) winter climate with times of heavy ground freeze.
The foundation system for the C-TEC net zero house incorporates new building technologies designed to promote effectiveness and reduce expense. The necessary concrete footings were formed using the form-a-drain product which once installed not only establishes the footing geometry but remains as fully defined and integrated footing drains on both the interior and exterior planes of the footing system. This not only eliminates the use and waste of wood forms but saves money by reducing the labor needed for breaking down and removing traditional forms and supplying, installing the necessary drain tile. Our master builder/instructor Rex Wilson also installed PVC bleeders through the footing to equalize any hydrostatic pressure differential that may occur between the interior and exterior of the footing/foundation wall.
Silt fences were carefully designed and constructed with respect to topographical slope to prevent erosion and spoiling of the adjacent open space areas while the earth was displaced from the foundation dig. The earth removed from the area of the new basement was also carefully piled, seeded and strawed both to mitigate erosion and preserve its integrity and finally a platform was created with oriented strand board and 6” of mulch to provide a durable, low impact area for the deposit of the necessary materials for the net zero house construction.
- Sustainability and durability implies doing no harm. The construction process which integrates our plans for infrastructure with the environment is disruptive as the earth is rendered for proper foundations, reconfigured for drainage swales and has to support both heavy equipment and tons of material delivery. Minimizing harm involves a careful analysis and respect for the work site and its surrounding…in the pictures one can see the careful consideration given to this issue of doing no harm…the tree, important for shading and the natural co2 and water cycles has been isolated by construction fencing to restrict activity over its sensitive root system…in general the visible canopy is a reflection of the invisible root system so the entire area under the canopy has been restricted…the rain garden area, so important for agriculture/horticulture and sustainable use of the water resource has also been carefully laid out and isolated by construction fencing to prohibit construction activity that would compress and adversely affect the areas ability to support rainwater absorption and plant growth.
Groundbreaking -May 2013
Fall 2012 – AED students helping in the design process of the house