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