Are Green Building Programs Really Leading to Green?€¦ · Sustainable sites 14 pts, 1 pr 21 pts,...

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1 Are Green Building Programs Are Green Building Programs Really Leading to Green? Really Leading to Green? The meaning of green. The meaning of green. Growing interest in green issues. Growing interest in green issues. - Product certification programs Product certification programs - Development of LCA/LCI Development of LCA/LCI Green building programs Green building programs Provisions of leading programs in the U.S. Provisions of leading programs in the U.S. Designation of environmentally preferable materials. Designation of environmentally preferable materials. A comparison and critique of leading programs. A comparison and critique of leading programs. Building environmentally better buildings vs. Building environmentally better buildings vs. maximizing green points. maximizing green points. Are Green Building Programs Really Leading to Green? Wood Products Council via Canadian Wood Council and the Wood Solutions Wood Products Council via Canadian Wood Council and the Wood Solutions Fair is a Registered Provider with The American Institute of Architects Fair is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion will be reported to CES Records for AIA members. Certificates of Completion for non for non-AIA members are available on request. AIA members are available on request. This program is registered with the AIA/CES for continuing professional This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this methods, and services will be addressed at the conclusion of this presentation. presentation. Program Education Credit Information Learning Objectives Learning Objectives 1. 1. Understand green building basics. Understand green building basics. 2. 2. Recognize environmentally preferable Recognize environmentally preferable materials. materials. 3. 3. Learn how to earn green credits while Learn how to earn green credits while also building environmentally better also building environmentally better buildings. buildings. What Does “Green” Mean? What Does “Green” Mean? Growing Interest in Green Issues Growing Interest in Green Issues

Transcript of Are Green Building Programs Really Leading to Green?€¦ · Sustainable sites 14 pts, 1 pr 21 pts,...

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Are Green Building Programs Are Green Building Programs

Really Leading to Green?Really Leading to Green?

�� The meaning of green.The meaning of green.

�� Growing interest in green issues.Growing interest in green issues.-- Product certification programsProduct certification programs-- Development of LCA/LCIDevelopment of LCA/LCI

�� Green building programsGreen building programs–– Provisions of leading programs in the U.S.Provisions of leading programs in the U.S.–– Designation of environmentally preferable materials.Designation of environmentally preferable materials.–– A comparison and critique of leading programs.A comparison and critique of leading programs.

�� Building environmentally better buildings vs. Building environmentally better buildings vs. maximizing green points.maximizing green points.

Are Green Building Programs Really Leading to Green?

Wood Products Council via Canadian Wood Council and the Wood Solutions Wood Products Council via Canadian Wood Council and the Wood Solutions Fair is a Registered Provider with The American Institute of Architects Fair is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion will be reported to CES Records for AIA members. Certificates of Completion for nonfor non--AIA members are available on request.AIA members are available on request.

This program is registered with the AIA/CES for continuing professional This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this methods, and services will be addressed at the conclusion of this presentation.presentation.

Program Education Credit Information Learning ObjectivesLearning Objectives

1.1. Understand green building basics.Understand green building basics.

2.2. Recognize environmentally preferable Recognize environmentally preferable materials.materials.

3.3. Learn how to earn green credits while Learn how to earn green credits while also building environmentally better also building environmentally better buildings.buildings.

What Does “Green”Mean?

What Does “Green”Mean?

Growing Interest in Green Issues

Growing Interest in Green Issues

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Product Certification Programs

Product Certification Programs

Product Certification ProgramsProduct Certification Programs

�� SCS FloorscoreSCS Floorscore

�� Carpet and Rug Institute’s GreenCarpet and Rug Institute’s Green

Label Plus ProgramLabel Plus Program

�� Forest and wood products Forest and wood products

certification programs.certification programs.

Forest Forest CertificationCertification andandCertified WoodCertified Wood

Forest Stewardship Council (FSC)

Sustainable Forestry Initiative (SFI)

Canadian Standards Association (CSA)

Program for the Endorsement of Forest Certification Programs (PEFC)

Forest Certification Programs in North America

FSC Principles

� Compliance with laws� Tenure and use rights and responsibilities� Indigenous Peoples’ rights� Community relations & worker’s rights� Benefits from the forest� Environmental Impact� Management Plan� Monitoring and Assessment� Maintenance of High Conservation Value Forests� Plantations

FSC Principles

� Compliance with laws� Tenure and use rights and responsibilities� Indigenous Peoples’ rights� Community relations & worker’s rights� Benefits from the forest� Environmental Impact� Management Plan� Monitoring and Assessment� Maintenance of High Conservation Value Forests� Plantations

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Forest Stewardship Council (FSC)

Sustainable Forestry Initiative (SFI)

Canadian Standards Association (CSA)

Program for the Endorsement of Forest Certification Programs (PEFC)

Forest Certification Programs in North America

Identifying Environmentally Superior Products and Practices

Identifying Environmentally Superior Products and Practices

Identifying Environmentally Superior Identifying Environmentally Superior Products and PracticesProducts and Practices

�� Brainstorming, intuitionBrainstorming, intuition

�� Systematic analysisSystematic analysis

Identifying Environmentally Superior Identifying Environmentally Superior Products and PracticesProducts and Practices

�� Brainstorming, intuitionBrainstorming, intuition

�� Systematic analysis Systematic analysis –– environmentalenvironmental

accountingaccounting

Life Cycle Assessment (LCA) / Life Cycle Inventory (LCI)

Life Cycle Assessment (LCA) / Life Cycle Inventory (LCI)

Life Cycle Inventory (LCI)

Examination of all measurable:

•Raw material inputs

•Products and by-products

•Emissions

•Effluents

•Wastes

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Life Cycle Inventory (LCI)

May involve all stages in production, use, and disposal, including:

•Extraction

•Transportation

•Primary processing

•Conversion to semi-finished products

•Incorporation into finished products

•Maintenance

•Disposal/reuse

Life Cycle Assessment (LCA)

Examines costs associated with specific environmental burdens:

•Cleanup costs

•Health impacts

•Landscape impacts

•Environmental impacts

OTHER RELEASES

PRODUCTS

COPRODUCTS

EMISSIONS

EFFLUENTS

SOLIDWASTESMATERIALS

ENERGY

WATER

Forest Management (Regeneration)

(Transportation)

Raw Material Acquisition(Harvest)

(Transportation)

Product Manufacturing

(Transportation)

Building Construction

(Transportation)

Use/Maintenance(Transportation)

Recycle/Waste Management(Transportation)

Relative Energy Consumption to Relative Energy Consumption to Produce a Ton of:Produce a Ton of:

Material Energy

Aluminum 70

Steel 17

Brick 3.1

Concrete Blocks 3.0

Dry Lumber 1.0

Source: CORRIM I, U.S. National Research Council, 1976.

Net Carbon Emissions in Producing a Ton of:Net Carbon Emissions in Producing a Ton of:

Net Carbon Emissions

Material (kg C/metric ton)

Framing lumber -457

Medium density fiberboard (virgin) -382

Brick 88

Glass 154

Recycled steel (from scrap) 220Concrete 265Concrete block 291Recycled aluminum (100% recycled) 309

Steel (virgin) 694

Plastic 2,502

Aluminum 4,532

Source: EPA 2006.

Carbon Dioxide Emissions of Various Carbon Dioxide Emissions of Various Components in a Typical HouseComponents in a Typical House

-1500

-1000

-500

0

500

1000

1500

2000

Timber

Steel

Concrete Slab

House Frame Floor Wall

Net Carbon Emission (kg C)

Source: Honey and Buchanan, Department of Civil Engineering, University of Canterbury, Christchurch, NZ, 1992.

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Interior Non-Load Bearing Wall, Wood vs. Steel

Comparative Energy Use (GJ)

Wood Steel

3.8 11.5

Source: Athena Sustainable Materials Institute, 1993.

Comparative Emissions in Manufacturing Wood vs. Steel-Framed Interior Wall

Emission/Effluent Wood Wall Steel Wall

CO2 (kg) ,305 965

CO (g) 2,450 11,800

SOX (g) 1,400 3,700

NOX (g) 1,150 1,800

Particulates (g) 1,100 335

VOCs (g) 390 1,800

Methane (g) ,4 45

Source: Athena Sustainable Materials Institute, 1993.

Comparative Effluents in Manufacturing Wood vs. Steel-Framed Interior Wall

Emission/Effluent Wood Wall Steel Wall

Suspended solids (g) 12,180 495,640

Non-ferrous metals (mg) 62 2,532

Cyanide (mg) 99 4,051

Phenols (mg) 17,715 725,994

Ammonia (mg) 1,310 53,665

Halogenated

organics (mg) 507 20,758

Oil and grease (mg) 1,421 58,222

Sulphides (mg) 13 507

Source: Athena Sustainable Materials Institute, 1993.

Performance Indices for Minneapolis Building

WoodWood SteelSteel

WallWall FloorFloor TotalTotal WallWall FloorFloor TotalTotal % Increase% Increase

EnergyEnergy 9797 1212 186186 148148 8383 308308 +66%+66%

GWPGWP 2079020790 19701970 3981039810 2893028930 1333213332 5929059290 +49%+49%

AirAir 14971497 242242 27782778 22462246 14141414 47114711 +70%+70%

WaterWater 3131 1010 185185 492492 544544 11791179 +531%+531%

Solid Solid wastewaste 76007600 11301130 1211012110 63206320 13231323 1102011020 --9%9%

Results of a LifeResults of a Life--Cycle Inventory of a Cycle Inventory of a Large Office BuildingLarge Office Building

Construction Total Energy Use*

Above Grade Energy Use*

CO2

Emissions**

Wood 3.80 2.15 73

Steel 7.35 5.20 105

Concrete 5.50 3.70 132

Source: Athena Sustainable Materials Institute (1997)

* GJ x 103

** kg x 103

Consumption of Fossil Fuels (MJ/ft.Consumption of Fossil Fuels (MJ/ft.22) ) Associated with Two Exterior Wall Associated with Two Exterior Wall Designs Designs –– Warm Climate HomeWarm Climate Home

Type of Exterior WallType of Exterior Wall

LumberLumber--FramedFramed ConcreteConcrete

Structural ComponentsStructural Components 6.276.27 75.8975.89

InsulationInsulation 8.518.51 8.518.51

CladdingCladding 22.3122.31 8.098.09

TotalTotal 37.0937.09 92.4992.49

Source: Edmonds and Lippke 2004.

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Consumption of Fossil Fuels (MJ/ft.Consumption of Fossil Fuels (MJ/ft.22) ) Associated with Three Floor DesignsAssociated with Three Floor Designs

Floor DesignFloor Design

Wood floor Wood floor joistsjoists

Concrete Concrete slabslab

Steel floor Steel floor joistsjoists

TotalTotal 9.939.93 24.7524.75 48.3248.32

Source: Edmonds and Lippke 2004.

Performance Indices for Minneapolis Building

Wood Steel

Wall Floor Total Wall Floor Total % Increase

Energy 97 12 186 148 83 308 +66%

GWP 20790 1970 39810 28930 13332 59290 +49%

Air 1497 242 2778 2246 1414 4711 +70%

Water 31 10 185 492 544 1179 +537%

Solid Waste 7600 1130 12110 6320 1323 11020 -9%

Source: CORRIM (2005)

Green Building Programs

Green Building Programs

�� LEEDLEED

�� Green GlobesGreen Globes

�� NAHB Green Building ProgramNAHB Green Building Program

�� Atlanta EarthCraft House Program Atlanta EarthCraft House Program

Green Building Programs

Leadership in Energy and Environmental Design (LEED)

Leadership in Energy and Environmental Design (LEED)

LEED

Introduced in 2000 by the U.S. Green Building Council

(USGBC)

LEED

Introduced in 2000 by the U.S. Green Building Council

(USGBC)

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Point Distribution within Several LEED Programs

LEED-NC, Version 2.2

LEED-H, Version 2.0

Sustainable sites 14 pts, 1 pr 21 pts, 2 pr

Water efficiency 5 pts 15 pts

Energy and atmosphere 17 pts, 3 pr 38 pts, 1 pr

Materials and resources 13 pts, 1 pr 14 pts, 3 pr

Indoor air quality 15 pts, 2 pr 20 pts, 7 pr

Innov. and design process 5 pts 10 pts

Location and linkages 9 pts, 4 pr

Homeowner awareness 3 pts, 1 pr

TOTAL 69 pts, 7 pr 108 pts, 18 pr

Point Distribution within Several LEED Programs

LEED-NC, Version 2.2

LEED-H, Version 2.0

Sustainable sites 14 pts, 1 pr 21 pts, 2 pr

Water efficiency 5 pts 15 pts

Energy and atmosphere 17 pts, 3 pr 38 pts, 1 pr

Materials and resources 13 pts, 1 pr 14 pts, 3 pr

Indoor air quality 15 pts, 2 pr 20 pts, 7 pr

Innov. and design process 5 pts 10 pts

Location and linkages 9 pts, 4 pr

Homeowner awareness 3 pts, 1 pr

TOTAL 69 pts, 7 pr 108 pts, 18 pr

Point Distribution within Several LEED Programs

LEED-NC, Version 2.2

LEED-H, Version 2.0

Sustainable sites 14 pts, 1 pr 21 pts, 2 pr

Water efficiency 5 pts 15 pts

Energy and atmosphere 17 pts, 3 pr 38 pts, 1 pr

Materials and resources 13 pts, 1 pr 14 pts, 3 pr

Indoor air quality 15 pts, 2 pr 20 pts, 7 pr

Innov. and design process 5 pts 10 pts

Location and linkages 9 pts, 4 pr

Homeowner awareness 3 pts, 1 pr

TOTAL 69 pts, 7 pr 108 pts, 18 pr

Points for “environmentally preferable materials” –

8 under LEED-NC8 under LEED-H

LEED-NC LEED-H

Materials and Resources

Credit 1.1-1.3 Building reuse Credits 1.1-1.5 – Limit waste in framing, advanced framing systems, off-site framing

Credit 2.1 and 2.2 - Reduction of construction waste

Credit 2.2 (Prereq)–Provide suppliers with notice of intent to specify FSC certified wood. All tropical wood must be FSC.

Credit 4.1 and 4.2 - Use of matlswith recycled content

Credit 2.2Environmentally preferable productsSelect environmentally preferable products from list – bamboo, cork, linoleum, reclaimed, recycled content (25% post-consumer), FSC certified, concrete (30% fly ash), low or no VOC or no urea formaldehyde, locally sourced; 90% or more by weight or volume. 0.5 points each, 8 points maximum.

Credit 5.1 and 5.2- Local/regional matls(extracted, processed, manufactured)

Credit 6 - Rapidly renewable matls(10-year or less harvesting cycle)

Credit 7 - FSC certified wood

Credits Related to Characteristics of Construction Materials Under the LEED-NC and LEED-H Programs

LEED-NC LEED-H

Indoor Environmental Quality Materials Requirements

Credit 4.4 – Low emitting materials, composite wood, and agrifuber

Credit 2.1, 2.2 – Quality management for durability. (Durability plan, indoor moisture controls, quality mgmt plan.

Innovative Design

Credit 4 – Innovative and regional design.Opportunity to use LCA or go over and above regular material credits.

Credits Related to Characteristics of Construction Materials Under the LEED-NC and LEED-H Programs

To date, identification of “green” building materials within LEED is characterized by intuition and a focus on single attributes . . .

To date, identification of “green” building materials within LEED is characterized by intuition and a focus on single attributes . . .

LEED SUMMARIZED

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To date, identification of “green” building materials within LEED is characterized by intuition and a focus on single attributes . . .

To date, identification of “green” building materials within LEED is characterized by intuition and a focus on single attributes . . .

. . . certified by FSC (wood only), rapidly renewable (10 years or less),contains recycled content, associated with low VOC emissions, comes from within 500 miles.

Forest Stewardship Council (FSC)

Sustainable Forestry Initiative (SFI)

Canadian Standards Association (CSA)

Program for the Endorsement of Forest Certification Programs (PEFC)

Forest Certification Programs in North America

Within LEED there is no requirement for certification of any construction material

other than wood . . .

Within LEED there is no requirement for certification of any construction material

other than wood . . . For wood to receive a point as a “green” material within the LEED program it must be

FSC certified.

For wood to receive a point as a “green” material within the LEED program it must be

FSC certified.

But if requirements as defined by FSC are important in determining a greenmaterial, why are materials other thanwood exempted?

� Compliance with laws� Tenure and use rights and responsibilities� Indigenous Peoples’ rights� Community relations & worker’s rights� Benefits from the forest� Environmental Impact� Management Plan� Monitoring and Assessment� Maintenance of High Conservation Value Forests� Plantations

There is no justification for singling out only one

construction material for a host of special requirements.

The production and use of allbuilding materials results in environmental and other

impacts.

There is no justification for singling out only one

construction material for a host of special requirements.

The production and use of allbuilding materials results in environmental and other

impacts.

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In the LEED program, wood does not receive any recognition for being a Renewable Material

In the LEED program, wood does not receive any recognition for being a Renewable Material

In addition, within LEED rapidly renewable materials

are preferred . . .

In addition, within LEED rapidly renewable materials

are preferred . . .

. . . despite a comprehensive study commissioned by LEED that concluded that there is

no justification for rewarding rapid renewability.

. . . despite a comprehensive study commissioned by LEED that concluded that there is

no justification for rewarding rapid renewability.

One material that is singled out in LEED for receipt of credit

because of rapid renewability is bamboo.

One material that is singled out in LEED for receipt of credit

because of rapid renewability is bamboo.

Yet, growing, and harvesting of bamboo has all of the problems

often attributed to wood.

Yet, growing, and harvesting of bamboo has all of the problems

often attributed to wood.

There are no certification standards within LEED for bamboo and other fast-growing materials.

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In the LEED program, a “green” credit is awarded

for use of recycled materials.

In the LEED program, a “green” credit is awarded

for use of recycled materials.

Yet, systematic analysis has shown that recycled materials such as steel studs nonetheless require twice the energy to produce, and result in more than twice the release of

greenhouse gases and other pollutants, as wood studs.

Yet, systematic analysis has shown that recycled materials such as steel studs nonetheless require twice the energy to produce, and result in more than twice the release of

greenhouse gases and other pollutants, as wood studs.

Within LEED, consideration of embodied energy and emissions,

effluents, and wastes is not required as part of environmental assessment of building materials.

Green GlobesGreen Globes

Green GlobesGreen Globes

Originated from the Canadian “Go Originated from the Canadian “Go Green Comprehensive” building Green Comprehensive” building

standards (which evolved from the UK standards (which evolved from the UK Building Research Establishment’s Building Research Establishment’s Environmental Assessment Method Environmental Assessment Method

(BREEAM). (BREEAM).

Modified for use in the United States Modified for use in the United States in 2004.in 2004.

Point Distribution within Green Globes

CategoryCategory Points

Project management 50 points

Site 115 points

Energy 380 points

Water 85 points

Resources 100 points

Emissions, effluents, other 70 points

Indoor environment 200 points200 points

TOTAL 1000 points

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Point Distribution within Green Globes

CategoryCategory Points

Project management 50 points

Site 115 points

Energy 380 points

Water 85 points

Resources 100 points

Emissions, effluents, other 70 points

Indoor environment 200 points200 points

TOTAL 1000 points

Characteristic Points

Have the following assemblies been selected based on a life cycle assessment considering embodied energy and green house gas emissions? – Foundations and floor assemblies, structural systems, roof assemblies, other mat’s (cladding, windows, etc.)

40

Minimize consumption and depletion of material resources 30

- What proportion of bldg matls and components are reused? 10

- What proportion of bldg materials contain recycled post-consumer content?

10

- What proportion of materials are bio-based mat’ls? 5

- What proportion of lumber and panel products are third-partycertified (SFI, CSA SFM Program, FSC, ATFS)?

5

Credits Related to Characteristics of Construction Materials Under the Green Globes Program

Characteristic Points

Re-use of existing structures 10

Building durability, adaptability and disassembly 10

Reduction, re-use and recycling of waste 10

Credits Related to Characteristics of Construction Materials Under the Green Globes Program

� A central focus of bldg materials assessment

is LCA/LCI using international protocols.

� The program seeks to minimize use of non-

renewable materials.

� Guidelines throughout the standards are based

on established standards (ANSI, ASHRAE).

� There is no requirement for certification of

any material other than wood, but any one of a number of certification programs are allowed.

Green Globes Bldg. Mat’ls Stds Summarized

The NAHB Green Building ProgramThe NAHB Green Building Program

NAHB Model Green Home Building Guidelines -Minimum Points Required for Levels of Achievement

CategoryCategoryMinimum Points Required to Attain Indicated Minimum Points Required to Attain Indicated

LevelLevel

Bronze Silver Gold Emerald

Lot Design, Prep., & Devel.

8 10 12 n/a

Resource Efficiency 44 60 77 n/a

Energy Efficiency 37 62 100 n/a

Water Efficiency 6 13 19 n/a

Indoor Env. Quality 32 54 72 n/a

Oper., Maint., and HO Educ.

7 7 9 n/a

Global Impact 3 5 6 n/a

Add’l Pts from Sectionsof Your Choice 100 100 100 n/a

Total Points 237 311 395 n/a

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NAHB Model Green Home Building Guidelines -Minimum Points Required for Levels of Achievement

CategoryCategoryMinimum Points Required to Attain Indicated Minimum Points Required to Attain Indicated

LevelLevel

Bronze Silver Gold Emerald

Lot Design, Prep., & Devel.

8 10 12 n/a

Resource Efficiency 44 60 77 n/a

Energy Efficiency 37 62 100 n/a

Water Efficiency 6 13 19 n/a

Indoor Env. Quality 32 54 72 n/a

Oper., Maint., and HO Educ.

7 7 9 n/a

Global Impact 3 5 6 n/a

Add’l Pts from Sectionsof Your Choice 100 100 100 n/a

Total Points 237 311 395 n/a

NAHB National Green Building Standard - Minimum Points Required for Levels of Achievement

CategoryCategoryMinimum Points Required to Attain Indicated Minimum Points Required to Attain Indicated

Level*Level*

Bronze Silver Gold Emerald

Lot Design, Prep., & Devel.

39 66 93 119

Resource Efficiency 45 79 113 146

Energy Efficiency 30 60 100 120

Water Efficiency 14 26 41 60

Indoor Env. Quality 36 65 100 140

Oper., Maint., and HO Educ.

8 10 11 12

Global Impact n/a n/a n/a n/a

Add’l Pts from Sectionsof Your Choice 150 100 100 100

Total Points 222 406 558 697

* In addition to attaining the minimum level of points as indicated above, must satisfy mandatory provisions.

Characteristic Points

Minimize size of dwelling 15

Reduce quantity of materials and waste 66

Enhance durability and reduce maintenance 49-53

Reuse salvaged or scrap materials; reuse existing buildings 19

Use recycled content materials 18

Recycle waste materials during construction 21

Use renewable, biobased materials/ certified wood products 15

Use resource efficient materials, incl. light brick, engineered wood or steel products, roof or floor trusses

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Use locally sourced materials for major elem. of the building 10

Select environmentally preferable materials using LCA 15

Use products from ISO 14001 cert. suppliers (1 point per % of products). 10

Credits Related to Resource Efficiency Under the NAHB National Green Building Standard

* Additional points under Health and Indoor Air Quality Section

134 of 251 total points

� Seeks to reduce quantity of materials and waste.

� Awards use of recycled content, renewable/biobased, and locally sourced materials.

� Certified wood specified, but certification maybe SFI, ATFS, CSA, or FSC.

� Use of LCA/LCI in designation of environmentally preferable materials or for full structure assessment rewarded.

� Doing business with ISO 14001 certified suppliers rewarded.

NAHB National Green Building Standard Summarized

The Atlanta Earth Craft House Program

The Atlanta Earth Craft House Program

Point Requirements for Certification Under the Atlanta EarthCraft House Program

Earthcraft Earthcraft House IHouse I

Earthcraft Earthcraft House IIHouse II

Earthcraft Earthcraft House IIIHouse III

Max. Max. Pts.Pts.

Site Planning 4 6 8 54

Energy Eff. Bldg. Envelope and Systems 80 90 100 375

Resource Efficient Design 2 2-3 3-4 51

Resource Efficient Building Materials 1-6 2-12 3-16 88

Waste Management 1-3 2-4 3-6 21

Indoor Air Quality 1-15 2-25 3-35 113

Water Conservation 1-3 2-5 3-10 62

Homebuyer Education 1 2 3-4 23

Builder Operations 1-2 2-4 3-6 15

Bonus Points + + + +

Minimum Pts Req. for Certification 150 200 230 874+

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Characteristic Points

Recycled and Natural Content Materials 26

Sustainably harvested lumber (50%) FSC 3

Cork or bamboo flooring 2

Outdoor decking and porches (min. 40% recycled content) 3

Cabinet faces reused, MDF, local species, or FSC certified wood 2

Advanced Products 28

Engineered wood framing (80%) 2

Engineered roof framing 3

All beams are steel, engineered wood, or trusses 1

All structural headers are steel or engineered wood 1

Engineered wall framing (25% of studs/80% of studs) 1/2

Steel interior wall framing 1

Engineered exterior trim including soffit, fascia, and trim 1

Durability 34

Credits Related to Resource Efficient Building Materials Under the Atlanta EarthCraft House Program Resource Efficient Building MaterialsResource Efficient Building Materials

While the use of FSC certified lumber, brings 3 green credits to aWhile the use of FSC certified lumber, brings 3 green credits to ahome builder, use of the following materials bring additional home builder, use of the following materials bring additional credits, whether environmentally certified or not:credits, whether environmentally certified or not:

�� Engineered floor framing (Min. 80%) Engineered floor framing (Min. 80%) Engineered trusses, IEngineered trusses, I--beams or nonbeams or non--woodwood. (2). (2)

�� Engineered roof framing (Min. 80%) Engineered roof framing (Min. 80%) Engineered trusses, IEngineered trusses, I--beams or nonbeams or non--woodwood. (3). (3)

�� Engineered wall framing. (min. 25% of studs). Examples of Engineered wall framing. (min. 25% of studs). Examples of acceptable material include acceptable material include nonnon--solidsolid--sawn woodsawn wood such as such as laminated or fingerlaminated or finger--jointed studs. (1)jointed studs. (1)

�� Engineered wall framing. (min. 80% of studs). Examples of Engineered wall framing. (min. 80% of studs). Examples of acceptable material include acceptable material include nonnon--solidsolid--sawn woodsawn wood such as such as laminated or fingerlaminated or finger--jointed studs. (2)jointed studs. (2)

�� Engineered exterior trim (Min. 80%) including soffit, fascia, and Engineered exterior trim (Min. 80%) including soffit, fascia, and trim made of trim made of nonnon--solid wood or nonsolid wood or non--wood materialwood material. (1). (1)

Resource Efficient Building MaterialsResource Efficient Building Materials

While the use of FSC certified lumber, brings 3 green credits to aWhile the use of FSC certified lumber, brings 3 green credits to ahome builder, use of the following materials bring additional home builder, use of the following materials bring additional credits, whether environmentally certified or not:credits, whether environmentally certified or not:

�� Structural headers (Min. 80%) are Structural headers (Min. 80%) are steel or engineered woodsteel or engineered wood. . (1)(1)

�� Beams (Min. 80%) are Beams (Min. 80%) are steel, engineered wood, or trussessteel, engineered wood, or trusses. . (1)(1)

�� OSBOSB (not plywood) roof decking (1)(not plywood) roof decking (1)

� Seeks to minimize materials use in construction.

� Rewards avoidance of solid wood in construction.

� FSC certified wood specified.

� Rewards use of recycled content, salvaged, durable, non-combustible, rapidly renewable materials.

� Little attention to individual characteristics ofbuilding materials.

� Building materials not assessed using LCA/LCI.

Atlanta EarthCraft House Program Summarized

A Comparison of Green Building Programs

A Comparison of Green Building Programs

Comparison of Green Building ProgramsGreen Building Program

LEED G. Globes NAHB Atl. EarthCraft

Cert. req. of mat’lsother than wood - - - -

FSC certification only X X

Wood cert. other thanFSC X X

3rd party verification of certification X X X

Rapid renewability rewarded X

Use of bamboo flooring rewarded X X X

Prescriptive system RE env. pref. mat’ls X X X

Bldg mat’ls assessment based on LCA/LCI

X (required)

X (voluntary)

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Environmental Attributes of Wood Building

Materials

Environmental Attributes of Wood Building

Materials

The Environmental Attributes of Wood

Wood is:

• Produced using solar energy.• A material that can be converted touseful products with minimal energy consumption and associated emissions.

• Manufactured in the U.S. by an industry

that in the U.S. is 60 to 70 percent

energy self-sufficient.

• A material that is 49 percent carbon.

• Renewable

The Environmental Attributes of Wood

Wood is:

• When purchased certified, the only

construction material available that

provides assurance of environmental

responsibility regarding production.

Building Environmentally Building Environmentally Better Buildings or Better Buildings or

Maximizing Green PointsMaximizing Green Points

Building Environmentally Building Environmentally Better Buildings or Better Buildings or

Maximizing Green PointsMaximizing Green Points

Building Environmentally Better BuildingsBuilding Environmentally Better Buildings

� Use guidelines that will, in fact, lead toward environmentally superior structures.

� Make use of LCA-based recommendations whenever possible.

Athena Impact EstimatorAthena Impact Estimator

www.athenasmi.ca/tools/impactEstimator/www.athenasmi.ca/tools/impactEstimator/index.htmlindex.html

15

Athena EcoCalculatorAthena EcoCalculator

www.athenasmi.ca/tools/ecoCalculator/inwww.athenasmi.ca/tools/ecoCalculator/index.htmldex.html

Building Environmentally Better BuildingsBuilding Environmentally Better Buildings

� Use guidelines that will, in fact, lead toward environmentally superior structures.

� Make use of LCA-based recommendations whenever possible.

� Reject nonsensical guidelines.

Building Environmentally Better BuildingsBuilding Environmentally Better Buildings

� Use guidelines that will, in fact, lead toward environmentally superior structures.

� Make use of LCA-based recommendations whenever possible.

� Reject nonsensical guidelines.

� When you have a choice, work with green building programs that base recommendations on systematic assessment.

Building Environmentally Better BuildingsBuilding Environmentally Better Buildings

� Use guidelines that will, in fact, lead toward environmentally superior structures.

� Make use of LCA-based recommendations whenever possible.

� Reject nonsensical guidelines.

� When you have a choice, work with green building programs that base recommendations on systematic assessment.

� Provide feedback to green building program administrators when you know program guidelines to be bogus.

Building Environmentally Better BuildingsBuilding Environmentally Better Buildings

� Use wood to the maximum extent possible.

When we finally get serious about moving toward sustainability, wood will re-emerge as the environmental

material of choice!

Questions/ Comments?Questions/ Comments?

This concludes the:This concludes the:

American Institute of ArchitectsAmerican Institute of Architects

Continuing Education Systems ProgramContinuing Education Systems Program

Are Green Building Programs Are Green Building Programs Really Leading to Green? Really Leading to Green?

Jim Bowyer

Bowyer and Associates, Inc./Dovetail Partners, Inc.

www.dovetailinc.org