Daniel J. Glenn

Design Director

ASU Stardust Center

HUD Workshop:

Energy Efficiency, Renewables, and Green Building in Housing Programs

September 17, 2008

Building Greener:

Materials and Methods

The Mission

Through research, educational outreach, advocacy and design innovation, the ASU Stardust Center for Affordable Homes and

the Family supports organizations, neighborhoods, and professionals in their efforts to improve the growth of quality

affordable homes and sustainable communities.

There are over 76 million residential and 5 million commercial buildings in the U.S. Collectively, these buildings consume:

65% of electricity and 37% of primary energy25% of all water supplies and

30% of all wood & materialsCollectively, these buildings generate:

35% of solid waste36% of CO2 and 46% of SO2

emissions19% of NOx and 10% of fine

particulate emissions(LEEDs US Green Building Council)

Importance of Construction(U

SGS, 2000)

(USG

S, 2000)

5% is renewable

Frontier Forests 8,000 Years Ago

Credit: Jonathan Lash (2005)

Frontier Forests Today

Credit: Jonathan Lash (2005)Credit: Jonathan Lash (2005)

Rapidly Melting Sea IceGulf Stream Flow Has Decreased by 30%?!

Credit: Jonathan Lash (2005)Credit: Jonathan Lash (2005)

Energy Consumption per Wall Type

0

50

100

150

200

250

300

6" Frame SIP 6" SIP 8" FlexCrete 8" Adobe 8" Adobe 12" Adobe 16"

kWh/

m2

Heating Cooling Lighting Other Total

ENERGY CONSUMPTION PER WALL TYPE

Greening Affordable Housing:Affordable + Sustainable Demonstration Homes

Nageezi House 2005 Guadalupe House 2006

ASU Stardust Center 2005 Affordable + SustainableDesign/Build Project

Nageezi, Navajo Nation

Project Sponsors:ASU Stardust Center for Affordable Homes and the FamilyNavajo Housing AuthorityNavajo FlexCreteFlexCrete Building SystemsNageezi ChapterCabinets SouthwestStardust Building SuppliesArizona MultibankAugustine Family

Ease of Use:•Lightweight – 1/5 weight of concrete•Easily shaped – sawed, drilled and shaped like wood w/ standard tools•Mortarless – Blocks are laid up with thin-set, not mortar.

Durability:•No organic material•Not susceptible to termites or other pests•Non-allergenic•Highly resistant to mod and fungi

Fire Resistant:•Meets ASTM E119 for four-hour rating

Energy Efficient:8” wall has an equivalent R-Value of 25 with no additional insulationMassive wall creates thermal lag for passive heating and coolingReduces energy use by 40 to 50 percent over stick-frame construction

Recycled Content:•Navajo FlexCrete is 60 percent flyash – recycled waste product from coal-burning electrical plants

Locally Produced•Navajo FlexCrete is produced in Page Arizona on the Navajo Reservation by the Navajo Nation.

Advantages

Of

Navajo

FlexCrete

Smart Growth:Build for the Desert

Guadalupe House -Affordable Green Demonstration Home

ASU Stardust Center 2006 Affordable + SustainableDesign/Build ProjectGuadalupe, Arizona

Project Sponsors/Suppliers:ASU Stardust Center for Affordable Homes and the FamilyGuadalupe YouthBuildNavajo Housing AuthorityNavajo FlexCreteSouthwest Tradition Log HomesStardust Building SuppliesSticks & StructuresAlter AirMirrorSealASU Photovoltaic Laboratory

Existing Residence

• Incrementally-bui

• Poorly constructed

• Condemned

Community Design WorkshopGroup #3 Conventional

scheme

February 1, 2006

Southwest Traditional Log Homes

Mirrorseal

Navajo FlexCrete

Sips Structures

ASU Photovoltaic Laboratory

U of A Environmental Research Laboratory

Alter Air

Cool Roof: Mirrorseal reducesroof temperature to ambient air

5,859 gallons of water/year

Valley Rain Precipitation

0 .8

0 .6

0 .3

0 .1 0 .1

0 .8

1

0 .70 .6 0 .6

0 .90 .9

0

0.2

0.4

0.6

0.8

1

1.2

150 gallons of grey water per day diverted to court yard

Infill Lots in Guadalupe

Colonia Lupita: Guadalupe Self-Help homes, 6 infill units

124’

35’

148’

60’

Guadalupe House

Guadalupe II

Guadalupe II

Project: Yanche Subdivision Design DevelopmentClient: Chicanos Por la Causa 47 units 5.8 DU/ACRE

Site Plan

Project: Yanche Subdivision Design DevelopmentClient: Chicanos Por la CausaElevation Variations

47 units 5.8 DU/ACRE

Street View

Floor Plans

47 units 5.8 DU/ACRE

Project: Yanche Subdivision Design Development

47 units 5.8 DU/ACRE

47 units 5.8 DU/ACRE

Insulated Concrete Forms, or ICFs, are used as a means of energy efficient construction. A typical ICF consists of highly insulative foam combined with a reinforced concrete wall. Through the combined effects of continuous R-Value, reduced air infiltration and thermal mass qualities moderating indoor temperatures, ICFsprovide a superior form of wall assembly. According to the Insulated Concrete Form Association, “homes built with ICF exterior walls typically require 44% less energy to heat and 32% less energy to cool than comparable frame homes. Benefits of building with ICFs include:

Insulated Concrete Forms

•Outstanding structural integrity, withstanding hurricane force winds and earthquakes.

•Energy efficient, with significant savings on heating and cooling.

•Increased comfort with more even indoor temperatures and no drafts.

•Lower insurance rates.

•Quieter than conventionally-built wood frame houses.

•Flexibility in the design of a home. Unique characteristics like curved walls are less expensive to build into an ICF home.

•Lower labor costs than frame construction. Keep in mind the price of these high-quality materials are slightly more than stick frames.

•The metal, concrete and insulating foam can all be recycled.

Insulated Concrete Forms