New Whole-House Solutions Case Study


Book Description

Even builders who are relatively new to energy-efficient construction can consistently reach a target whole house airtightness of 1.5 air changes per hour at 50 Pascals (ACH50) with high R-value enclosures that use a hybrid insulation approach. In 2010, the City of Wyandotte, Michigan, started construction to build affordable, energy-efficient homes on lots in existing neighborhoods. A goal was to engage local builders in energy-efficient construction and be able to deliver the new houses for less than $100/ft2. By the end of 2012, approximately 25 new houses were built by five local builders under this program. To help builders consistently achieve the airtightness target, a local architect worked with researchers from Building Science Corporation, a Building America team, to develop a technology specification with several key pieces. A high R-value wall and roof assembly made use of 2 ×6 advanced framing and a hybrid insulation approach that included insulating sheathing to control thermal bridging and closed cell spray polyurethane foam insulation (ccSPF) for its airtightness and vapor control benefits. This approach allows the air barrier to be completed and tested before any finishing work occurs, ensuring that problems are spotted and corrected early in the construction process.




The Intersection of Energy Efficiency and Affordable Housing


Book Description

The study researched inclusions and limitations of zoning ordinances for energy efficient, affordable housing in upstate New York. A survey tested the acceptance level of the public toward mandates for affordable housing and energy efficient housing as discrete programs for residential development. Data was collected using interviews of key stakeholders and policy implementers in Tompkins County, New York. The Cornell Institute for Social and Economic Research conducted the survey as part of the annual Empire State Poll. There were three hypotheses, the first being that requiring energy efficient, affordable housing is an unpopular concept in New York State. The second hypothesis was that local land use regulations limit affordable, energy efficient development. The third hypothesis was that housing development that is both energy efficient and affordable is not a high priority concept for community planners. The results from the survey reveal that the residents of New York State supports housing development that is affordable and that is energy efficient. Data collected from interviews of planners, lenders and developers in Tompkins County, New York indicate local land use regulations have an impact on residential development in a variety of ways, but that affordable, energy efficient housing is a high priority in the county. This research brings forth possible solutions for changes to zoning ordinances that may encourage developers to build housing units that are affordable to a broad range of socioeconomic levels and meet the needs of a diverse community such as Tompkins County, New York.







Holistically Green Homes


Book Description

Most houses being built today are not as energy efficient as they could be. Every builder, if asked, "Do you build energy efficient houses?" will persuasively answer, "Yes." Without studying energy efficient housing in an objective way, most homebuyers will believe the builder's answer. Yet studies and tests prove otherwise. After reading the eighteen clearly defined principles in this book, the reader will have a basis for understanding and comparing the efficiency of one house to another and one builder to another. The eighteen easy-to-implement principles are based on tried and proven solutions for conservation and clean renewable energy generation. Homes that are built to be "holistically green" are economical and maintain their value. And by saving energy and improving indoor quality, they are environmentally responsible and provide a healthier place to live. Building an energy-conscious home is smarta smart financial investment, a smart approach to our energy and environmental challenges, and "the right thing to do." The benefits of planning for and building based on the Eighteen Principles in total are greater than the sum of the individual principles. References are made in the textfrom principle to principlethat will be helpful in understanding how each one is dependent in some way on the other. Economic and financial considerations are discussed based on examples and case studies. The studies show that, while it does cost more to build a house that is energy efficient, environmentally friendly and responsible, structurally stronger, and resistant to the challenges of time, a well designed, efficient home can be more economical to live inbeginning with the first month that utility bills are received. And it is a better investment because of the higher resale value and reduced maintenance. This book will educate and instill confidence in consumers with regard to their largest personal investment: their home. They will understand what specifics to look for to get an energy efficient, healthy home that will save them money and have a positive impact on energy conservation, energy generation, and climate change.







Building America Case Study


Book Description

Single family homes in urban areas that are available for renovation by nonprofit developers are often in rough shape (1MM to 2MM nationally). Budgeting has historically focused on improving homes to meet basic housing standards. A rising interest in the long-term impact of homeownership has introduced the need to balance basic needs with home performance. This demonstration project aims to help nonprofit affordable housing developers become familiar with three Building America performance measures, the installation processes, and impacts and benefits of each. A story and a half home in North Minneapolis, MN was presented by Urban Homeworks our local nonprofit partner. The team helped them install three researched upgrade measures: exterior roof insulation or 'overcoat, ' exterior foundation insulation, or 'excavationless', and a combined space and water heating HVAC system or 'combi'. To maximize efficiency of application and to address budget issues, the Team worked with Urban Homeworks to identify ways to use volunteers and construction training programs to install the measures. An open invitation to visit the job site was extended to other nonprofit developers and industry partners to encourage dialog about the systems during live installation.




Existing Whole-House Solutions Case Study


Book Description

This project analyzes the cost effectiveness of energy-saving measures installed by a large public housing authority in Salishan, and evaluates those solutions to improve efficiency of affordable housing for new and existing homes. Research focuses on the modeled and measured energy usage of the first six phases of construction, and compares the energy usage of those phases to phase 7.




Affordable Cold Climate Infill Housing with Hybrid Insulation Approach, Wyandotte, Michigan (Fact Sheet)


Book Description

Even builders who are relatively new to energy-efficient construction can consistently reach a target whole house airtightness of 1.5 air changes per hour at 50 Pascals (ACH50) with high R-value enclosures that use a hybrid insulation approach. The City of Wyandotte, Michigan, started a construction program in 2010 to build affordable, energy-efficient homes on lots in existing neighborhoods. Agoal of the program was to engage local builders in energy-efficient construction and be able to deliver the new houses for less than $100/ft2. By the end of 2012, approximately 25 new houses were built by five local builders under this program. To help builders consistently achieve the airtightness target, a local architect worked with researchers from Building Science Corporation, a U.S.Department of Energy Building America team, to develop a technology specification with several key pieces. A high R-value wall and roof assembly made use of 2 x 6 advanced framing and a hybrid insulation approach that included insulating sheathing to control thermal bridging and closed cell spray polyurethane foam insulation (ccSPF) for its airtightness and vapor control benefits. This approachallows the air barrier to be completed and tested before any finishing work occurs, ensuring that problems are spotted and corrected early in the construction process.




Building an Affordable House


Book Description

The first comprehensive guide of its kind, Building an Affordable House is for homeowners and building contractors who want to incorporate proven cost-saving techniques into their projects.