LEED v4 and Credits for Wood Use

Transcription

1 LEED v4 and Credits for Wood Use Jim Bowyer Dovetail Partners, Inc. Minneapolis, MN This presentation was developed by a third party and is not funded by WoodWorks or the Softwood Lumber Board.

2 The Wood Products Council is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/ CES), Provider #G516. Credit(s) earned on completion of this program will be reported to AIA/CES for AIA members. Certificates of Completion for both AIA members and non- AIA members are available upon request. This program is registered with AIA/CES for continuing professional 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 construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.

3 Course Description This presentation examines changes in the latest version of LEED (LEED v4) and implications for wood use. Particular attention is given to the Materials and Resources section of the standard where the greatest changes have been made. Environmental Product Declarations (EPDs) and Health Product Declarations (HPDs) both of which are prominent within LEED v4 are explained, and their potential use, as well as potential problems in attempting to use, are discussed.

4 Learning Objectives Understand the changes that have been made in the latest version of LEED (v4) and implications for building materials selection and wood use. Understand the purpose of EPDs, the science behind them, the nature of information they provide, and how to use them effectively in the building materials selection process. Learn the essentials of HPDs and their use. Learn current limitations to application of EPDs and alternative approaches to identifying low impact materials.

5 Focus of Presentation Will focus on LEED for New Construction and Major Renovation. Within each program will focus on Materials and Resources, and will touch on Indoor Environmental Quality.

6 Outline Overview of Changes from LEED 2009 to LEED v4 Examination of LCA as a Basis for Understanding EPDs Essentials of EPDs and Their Use Essentials of HPDs and Their Use Awarding of Points within LEED v4 Wood Use and LEED v4 Summary

7 Changes to the LEED Standard an Overview

8 Point Thresholds within LEED v4 The main sections of the standard include 100 points. Up to 10 additional points are offered for other project considerations, including: work with a LEED Accredited Professional (1 pt), compliance with provisions that match areas of regional priority (4 pts), and innovation (5 pts).

9 Major Changes in LEED v4 Expanded application to data centers, warehouses, hotels, existing retail and schools, mid-rise residential 2 additional credit categories: - Location - Integrative Process Prerequisites for metering energy and water use Energy performance requirements Minimum requirements for Energy and Atmosphere and Location and Transportation categories.

10 Point Distribution In LEED v4 New Construction and Major Renovation

11 Major Changes in the Materials and Resources Category Added prerequisite for waste management New optional credits related to: - Life Cycle Assessment (LCA) - Environmental Product Declarations (EPDs) - Materials ingredients reporting - Reporting of raw materials sourcing and extraction New list of responsible sourcing criteria, including extended producer responsibility, bio-based materials, certified, and recycled content materials.

12 Major Changes in the Materials and Resources Category New locally sourced definition with a 100 mile limit. Removal of credits for rapidly renewable materials.

13 Comparison of Materials & Resources Prerequisites and Credits in LEED 2009 and v4 LEED 2009 New Construction and Major Renovations (14 total possible points) MRc1 MRc2 Storage and collec-on of recyclables Construc-on waste management LEED v4 New Construction and Major Renovations (13 total possible points) Required Prereq. Storage and collec-on of recyclables 2 possible points Prereq. Credit Construc-on and demoli-on waste management planning Construc-on waste management Required Required 2 possible points

14 Comparison of Materials & Resources Prerequisites and Credits in LEED 2009 and v4 LEED 2009 New Construction and Major Renovations (14 total possible points) MRc1 MRc2 Storage and collec-on of recyclables Construc-on waste management MRc1.1 Building reuse maintain exis-ng walls, floors, roof MRc1.2 Building reuse maintain exis-ng interior elements LEED v4 New Construction and Major Renovations (13 total possible points) Required Prereq. Storage and collec-on of recyclables 2 possible points 3 possible points 1 possible point Prereq. Credit Construc-on and demoli-on waste management planning Construc-on waste management Now included within building life cycle impact reduc-on Historic, blighted buildings added Required Required 2 possible points 2-5 possible points

15 Comparison of Materials & Resources Prerequisites and Credits in LEED 2009 and v4 LEED 2009 New Construction and Major Renovations (14 total possible points) MRc3 Materials reuse 2 possible points MRc4 Recycled content 2 possible points MRc7 Cer-fied wood 1 possible point MRc5 MRc6 Regional materials (500 mile limit) Rapidly renewable materials 2 possible points 1 possible point LEED v4 New Construction and Major Renovations (13 total possible points) No longer stand- alone credits No longer a stand- alone credit Now included as elements under Responsible Sourcing (6 categories contribute to credit). Can provide bonus credit only in several specified credit areas. (100 mile limit) Eliminated 2 possible points

16 Comparison of Materials & Resources Prerequisites and Credits in LEED 2009 and v4 LEED 2009 New Construction and Major Renovations (14 total possible points) LEED v4 New Construction and Major Renovations (13 total possible points) Credit Building product disclosure and op-miza-on Environmental Product Declara-ons* 2 possible points Credit Building product disclosure and op-miza-on Material Ingredients* 2 possible points * Double credit for cost basis if sourced (raw materials extracted, manufactured, distributed) from within 100 mile radius.

17 Life Cycle Assessment

18 Determining the Environmental Impact of Products Brainstorming, intuition

19 Determining the Environmental Impact of a Product Brainstorming, intuition Systematic analysis - - environmental accounting Life Cycle Assessment

20 Determining the Environmental Impact of a Product

21 Determining the Environmental Impact of a Product

22 Determining the Environmental Impact of a Product

23 Life Cycle Inventory (LCI) Examination of all measurable: Raw material inputs Products and by-products Emissions Effluents Wastes

24 In determining environmental impacts, consider: Raw material extraction Transportation All steps in manufacturing

25 - Analyze individual components, wall sections, entire structure. - Full bill of materials. - Track life cycle environmental impacts of every component. Raw material inputs Energy consumption Emissions Effluents Solid wastes By-products

26 If the product is a component assembled on-site or an entire structure, also assess: Transport of materials to construction site Building construction Operation (heating/cooling) Maintenance End-of-building-life

27 Impact Measures Fossil fuel consumption Weighted resource use Global warming potential Smog potential Acidification potential Human health respiratory effects Photochemical oxidation Ozone layer depletion Depletion of non-renewable resources Water consumption Eutrophication Solid waste

28 If comparing two different products: They must be functionally equivalent. They must be evaluated: - in the same way and in accordance with international protocols. - using the same system boundaries. - including all significant aspects and emission factors.

29 Steel Design Columns hollow structural section steel, beams wide flange steel; Intermediate floors open-web steel joists w/concrete topping; Exterior walls 2x4 steel studs 16 o.c., R-3.8 rigid insulation sheathing, stucco cladding, R-13 Batt insulation + PET membrane, gypsum board + latex paint; Roof open-web steel joists w/steel decking, R-20 rigid insulation + PET membrane, modified bitumen membrane, gypsum board + latex paint. Concrete Design Columns reinforced concrete, concrete beams; Intermediate floors precast double-t truss with concrete topping; Exterior walls concrete block w continuous insulation and polyethylene membrane, stucco cladding; Roof pre-cast double-t concrete, R-20 continuous insulation + PET membrane, modified bitumen membrane, latex paint.

30 ENVIRONMENTAL IMPACT SUMMARY STEEL CONSTRUCTION Assembly Total area Fossil Fuel Consumpt. (MJ) Weighted Resource use (tonnes) GWP (tonnes CO 2 eq) Acidificatio n Potential (moles of H + eq) HH Respiratory Effects Potential (kg PM2.5 eq) Eutrophica tion Potential (g N eq) Ozone Depletion Potential (mg CFC-11 eq) Smog potential (g NOx eq) Foundations & Footings , , , CONCRETE VS. STEEL Columns and Beams ,400, , , Intermediate Floors ,428, , , Exterior Walls , , , Windows Interior Walls Roof ,405, , , S 8,760,105 1, ,307 1, , ,079 ENVIRONMENTAL IMPACT SUMMARY CONCRETE CONSTRUCTION Assembly Total area Fossil Fuel Consumpt. (MJ) Weighted Resource use (tonnes) GWP (tonnes CO 2 eq) Acidificatio n Potential (moles of H + eq) HH Respiratory Effects Potential (kg PM2.5 eq) Eutrophica tion Potential (g N eq) Ozone Depletion Potential (mg CFC-11 eq) Smog potential (g NOx eq) Foundations & Footings , , , Columns and Beams ,273,849 1, , , Intermediate Floors ,081, , , Exterior Walls ,758, , , ,051 Windows Interior Walls Roof ,099, , , ,166 S 11,745,595 3, ,604 1, , ,037

31 ENVIRONMENTAL IMPACT SUMMARY STEEL CONSTRUCTION Assembly Total area Fossil Fuel Consumpt. (MJ) Weighted Resource use (tonnes) GWP (tonnes CO 2 eq) Acidificatio n Potential (moles of H + eq) HH Respiratory Effects Potential (kg PM2.5 eq) Eutrophica tion Potential (g N eq) Ozone Depletion Potential (mg CFC-11 eq) Smog potential (g NOx eq) Foundations & Footings , , , CONCRETE VS. STEEL Columns and Beams ,400, , , Intermediate Floors ,428, , , Exterior Walls , , , Windows Interior Walls Roof ,405, , , S 8,760,105 1, ,307 1, , ,079 ENVIRONMENTAL IMPACT SUMMARY CONCRETE CONSTRUCTION Assembly Total area Fossil Fuel Consumpt. (MJ) Weighted Resource use (tonnes) GWP (tonnes CO 2 eq) Acidificatio n Potential (moles of H + eq) HH Respiratory Effects Potential (kg PM2.5 eq) Eutrophica tion Potential (g N eq) Ozone Depletion Potential (mg CFC-11 eq) Smog potential (g NOx eq) Foundations & Footings , , , Columns and Beams ,273,849 1, , , Intermediate Floors ,081, , , Exterior Walls ,758, , , ,051 Windows Interior Walls Roof ,099, , , ,166 S 11,745,595 3, ,604 1, , ,037

32 ENVIRONMENTAL IMPACT SUMMARY STEEL CONSTRUCTION Assembly Total area Fossil Fuel Consumpt. (MJ) Weighted Resource use (tonnes) GWP (tonnes CO 2 eq) Acidificatio n Potential (moles of H + eq) HH Respiratory Effects Potential (kg PM2.5 eq) Eutrophica tion Potential (g N eq) Ozone Depletion Potential (mg CFC-11 eq) Smog potential (g NOx eq) Foundations & Footings , , , CONCRETE VS. STEEL Columns and Beams ,400, , , Intermediate Floors ,428, , , Exterior Walls , , , Windows Interior Walls Roof ,405, , , S 8,760,105 1, ,307 1, , ,079 ENVIRONMENTAL IMPACT SUMMARY CONCRETE CONSTRUCTION Assembly Total area Fossil Fuel Consumpt. (MJ) Weighted Resource use (tonnes) GWP (tonnes CO 2 eq) Acidificatio n Potential (moles of H + eq) HH Respiratory Effects Potential (kg PM2.5 eq) Eutrophica tion Potential (g N eq) Ozone Depletion Potential (mg CFC-11 eq) Smog potential (g NOx eq) Foundations & Footings , , , Columns and Beams ,273,849 1, , , Intermediate Floors ,081, , , Exterior Walls ,758, , , ,051 Windows Interior Walls Roof ,099, , , ,166 S 11,745,595 3, ,604 1, , ,037

33 ENVIRONMENTAL IMPACT SUMMARY STEEL CONSTRUCTION Assembly Total area Fossil Fuel Consumpt. (MJ) Weighted Resource use (tonnes) GWP (tonnes CO 2 eq) Acidificatio n Potential (moles of H + eq) HH Respiratory Effects Potential (kg PM2.5 eq) Eutrophica tion Potential (g N eq) Ozone Depletion Potential (mg CFC-11 eq) Smog potential (g NOx eq) Foundations & Footings , , , CONCRETE VS. STEEL Columns and Beams ,400, , , Intermediate Floors ,428, , , Exterior Walls , , , Windows Interior Walls Roof ,405, , , S 8,760,105 1, ,307 1, , ,079 ENVIRONMENTAL IMPACT SUMMARY CONCRETE CONSTRUCTION Assembly Total area Fossil Fuel Consumpt. (MJ) Weighted Resource use (tonnes) GWP (tonnes CO 2 eq) Acidificatio n Potential (moles of H + eq) HH Respiratory Effects Potential (kg PM2.5 eq) Eutrophica tion Potential (g N eq) Ozone Depletion Potential (mg CFC-11 eq) Smog potential (g NOx eq) Foundations & Footings , , , Columns and Beams ,273,849 1, , , Intermediate Floors ,081, , , Exterior Walls ,758, , , ,051 Windows X 0 2.2X 0 1.9X 0 1.7X 0 1.6X 1.5X 0 3.9X X Interior Walls Roof ,099, , , ,166 S 11,745,595 3, ,604 1, , ,037

34 Alternatives to a Full LCA Environmental product labels.

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36 ISO Environmental Labeling Standards ISO has established standards for three types of labels: Type I - the most common type of label in today s market. Require third party certification of a pre-set list of criteria for issues such as recycled content, VOC s, and bio-degradability. Type II - provide criteria for self-declarations by a materials extraction organization (mining, for example), manufacturer or supplier. There is no third party review in Type II labels. Type III - require the rigorous use of life cycle environmental information, an open consultation process, and ease of comparison among products. Type III labels are similar to consumer nutrition labeling on food products.

37 ISO Environmental Labeling Standards ISO has established standards for three types of labels: Type I - the most common type of label in today s market. Require third party certification of a pre-set list of criteria for issues such as recycled content, VOC s, and bio-degradability. Type II - provide criteria for self-declarations by a materials extraction organization (mining, for example), manufacturer or supplier. There is no third party review in Type II labels. Type III - require the rigorous use of life cycle environmental information, an open consultation process, and ease of comparison among products. Type III labels are similar to consumer nutrition labeling on food products.

38 ISO Environmental Labeling Standards ISO has established standards for three types of labels: Type I - the most common type of label in today s market. Require third party certification of a pre-set list of criteria for issues such as recycled content, VOC s, and bio-degradability. Type II - provide criteria for self-declarations by a materials extraction organization (mining, for example), manufacturer or supplier. There is no third party review in Type II labels. Type III - require the rigorous use of life cycle environmental information, an open consultation process, third party review, and ease of comparison among products. Type III labels are similar to consumer nutrition labeling on food products.

39 Alternatives to a Full LCA Environmental product labels. - ISO Type I 3 rd party, single attribute. - ISO Type II self declaration. - ISO Type III LCA-based, multiple attribute, 3 rd party verified information. Environmental Product Declaration

40 Environmental Product Declarations

41 Environmental Product Declaration (EPD) An EPD provides consistent and comparable information to industrial customers and enduse consumers regarding environmental impacts. Product category rules define how information is to be collected and how measurements are to be made.

42 Environmental Product Declarations LCA - based Disclose quantified life cycle data for a product. Must clearly state the life cycle stages and product components covered. Third party verified

43 Development of an EPD Organization for Implementation Product Category Rules Input from producers, LCA experts, testing institutes, NGOs, consumer orgs. Tests, Certificates, Other information Life Cycle Assessment EPD Draft Verification by independent third party EPD Publication

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46 Product description Light Gauge Steel profiles are cold-formed profiles that are used to construct the bearing walls, flooring and roof panels of a building. Declaration is based on aver- aged thickness of cold-formed steel profiles prepared according to a design specification of a building. Application Light Gauge Steel profiles from hot-dip galvanized steel are used in construction industry as well as many other applications: roofing (roofing sheets, roof tiles), cladding (Trapezoidal sheets, sandwich panels, wall cassettes), interior trim (trapezoidal sheets, sandwich panels, wall cassettes), flat sheets (covers, structural panels, wall connections, facing roof), roof drainage systems (gutters, downspouts, soffit boards and accessories), Automotive (vehicles, trailers, refrigeration units), white and brown goods. Typical applications of steel profiles are: - Detached houses, - Villas, vineyard huts, - School and dormitory buildings, - Commercial buildings, - Factory buildings.

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49 Publisher Institut Bauen und Umwelt e.v. Tel. +49 (0) Rheinufer 108 Fax +49 (0) Königswinter Germany Web Programme holder Institut Bauen und Umwelt e.v. Tel. +49 (0) Rheinufer 108 Fax +49 (0) Königswinter Germany Web Owner of the Declaration Akkon Steel Structure Systems Co Tel Çerkezköy Organize Sanayi Bölgesi, Fax: GMKP Mah Atatürk Caddesi No:134, Çerkezköy, Tekirdağ Turkey Web Author of the Life Cycle Assessment Metsims Sustainability Consulting Tel Veko Giz Plaza, Meydan Sk. No:3 K.13 Fax: Maslak İstanbul Turkey Web

50 lumber. This EPD was developed in compliance with ISO and ISO and has been verified under UL Environment s EPD program. The EPD includes Life-Cycle Assessment (LCA) results for all processes up to the point that planed and dry lumber is packaged and ready for shipment at the manufacturing gate; the cradle-togate product system includes forest management, logging, transportation of logs to lumber mills, sawing, kiln-drying, and planing.

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57 F. INTERIOR WALLS Assembly Type Fossil Fuel Consumpt. per ft. 2 (MJ) Weighted Resource use per ft. 2 (mt) GWP per ft. 2 (mt CO 2 eq) Acidifica tion Potential per ft. 2 (moles of H+ eq) HH Respiratory Effects Potential per ft. 2 (kg PM2.5 eq) Average across interior walls x4 Wood Stud Wall 16 o.c. 5/8 gypsum board + 2 coats latex paint x4 Wood Stud Wall 24 o.c. 5/8 gypsum board + 2 coats latex paint x4 Wood Stud Wall 16 o.c. 2 x 5/8 gypsum board + 2 coats latex paint /8 x 3 5/8 Steel Stud Wall 16 o.c. 5/8 gypsum board + 2 coats latex paint /8 x 3 5/8 Steel Stud Wall 24 o.c. 5/8 gypsum board + 2 coats latex paint /8 x 3 5/8 Steel Stud Wall 24 o.c. 2 x 5/8 gypsum board + 2 coats latex paint Concrete Block 5/8 gypsum board + 2 coats latex paint Concrete Block 2 coats latex paint

58 F. INTERIOR WALLS Assembly Type Fossil Fuel Consumpt. per ft. 2 (MJ) Weighted Resource use per ft. 2 (mt) GWP per ft. 2 (mt CO 2 eq) Acidifica tion Potential per ft. 2 (moles of H+ eq) HH Respiratory Effects Potential per ft. 2 (kg PM2.5 eq) Average across interior walls x4 Wood Stud Wall 16 o.c. 5/8 gypsum board + 2 coats latex paint x4 Wood Stud Wall 24 o.c. 5/8 gypsum board + 2 coats latex paint x4 Wood Stud Wall 16 o.c. 2 x 5/8 gypsum board + 2 coats latex paint /8 x 3 5/8 Steel Stud Wall 16 o.c. 5/8 gypsum board + 2 coats latex paint /8 x 3 5/8 Steel Stud Wall 24 o.c. 5/8 gypsum board + 2 coats latex paint /8 x 3 5/8 Steel Stud Wall 24 o.c. 2 x 5/8 gypsum board + 2 coats latex paint Concrete Block 5/8 gypsum board + 2 coats latex paint Concrete Block 2 coats latex paint

59 Health Product Declarations

60 Health Product Declarations The Health Product Declaration Standard was originally developed by the HPD Working Group in collaboration with the Healthy Building Network and Building Green. It is now managed by the HPD Collaborative.

61 Health Product Declarations - HPDs describe product content and direct health hazards associated with human exposure to the individual components of a product. - An HPD is not an assessment of risks associated with actual use of a product. - An HPD does not address potential health impacts of substances used or created during manufacture. - An HPD is not a full assessment of environmental impacts from the life cycle of a product.

62 Health Product Declarations - An HPD differs from a MSDS: o An HPD aims for 100% disclosure of all ingredients: If hazardous, must be reported much as in MSDS. Also provides information as to long-term, chronic exposure. o A MSDS provides information about how to work with a hazardous substance or product in a safe manner. Focus is acute health risks: Physical data melting point, boiling point, flash point) Other information toxicity, health effects, first aid, storage, disposal, protective clothing, spill handling, etc.)

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67 Awarding of Points within LEED v4

68 LEED v.4 and LCA Building life-cycle impact reduction (5 pts. possible) - Historic building reuse (5 pts), or - Renovation of abandoned or blighted building (5 pts), or - Building and materials reuse (2-4 pts), or

69 LEED v.4 and LCA Building life-cycle impact reduction (5 pts. possible) - Historic building reuse (5 pts), or - Renovation of abandoned or blighted building (5 pts), or - Building and materials reuse (2-4 pts), or - Whole building life cycle assessment (3 pts)

70 LEED v.4 and LCA Building life-cycle impact reduction (5 pts. possible) - Whole building life cycle assessment (3 pts) New construction (bldgs or portions of bldgs) LCA must demonstrate a minimum 10% reduction, compared to a baseline building:

71 LEED v.4 and LCA Building life-cycle impact reduction (5 pts. possible) - Whole building life cycle assessment (3 pts) New construction (bldgs or portions of bldgs) LCA must demonstrate a minimum 10% reduction, compared to a baseline building: GWP (required) And, at least two of the following: Stratospheric ozone depletion Acidification potential Eutrophication potential Formation of tropospheric ozone Depletion of nonrenewable energy resources

72 LEED v.4 and EPDs Building product disclosure and optimization environmental product declarations (2 pts. possible) - Use at least 20 different permanently installed products sourced from at least 5 different manufacturers that meet one of the following disclosure criteria: EPDs (1 point) - Industry-wide (generic) EPD where the product manufacturer is a participant. (counted as ½ of a product in credit calculation) - Product-specific EPD where the product manufacturer is the participant. Second point is gained for optimization

73 LEED v.4 and EPDs Building product disclosure and optimization environmental product declarations (2 pts. possible) - Use at least 20 different permanently installed products sourced from at least 5 different manufacturers that meet one of the following disclosure criteria: EPDs (1 point) - Industry-wide (generic) EPD where the product manufacturer is a participant. (counted as ½ of a product in credit calculation) - Product-specific EPD where the product manufacturer is the participant. Clarification being sought

74 LEED v.4 and EPDs Building product disclosure and optimization environmental product declarations - Use at least 20 different permanently installed products sourced from at least 5 different manufacturers that meet one of the following disclosure criteria: Product specific declarations. (1 point) Products for which there is a publicly available, critically reviewed (ISO 14044) assessment of at least cradle to gate scope (counted as ¼ of a product in credit calculation). AND/OR...

75 LEED v.4 and EPDs Building product disclosure and optimization environmental product declarations (must comply with one of criteria below for 50% by cost of total value of permanently installed product) Third-party certified products that demonstrate impact reduction below industry average in at least 3 of the following categories: GWP Stratospheric ozone depletion Acidification potential Eutrophication potential Formation of tropospheric ozone Depletion of nonrenewable energy resources

76 LEED v.4 and HPDs Building product disclosure and optimization material ingredients (2 pts. possible) - Material ingredient reporting. (1 pt.) Use at least 20 different permanently installed products sourced from at least 5 different manufacturers that meet one of a number of specified programs to demonstrate the chemical inventory of a product to at least 0.1% (1000 ppm) Manufacturer inventory (complete, public, CASRN) Health product Declaration Cradle to Cradle certification at Basic or Bronze level

77 LEED v.4 and HPDs Building product disclosure and optimization material ingredients - Material ingredient optimization. (1 pt) Use products that document their material ingredient optimization using various identified paths* for at least 25% of the cost of the total value of permanently installed products in a project. * Green Screen, Cradle to Cradle Certified, REACH Optimization

78 LEED v.4 and HPDs Building product disclosure and optimization material ingredients - Product mfg supply chain optimization (1 pt). Products are sourced from manufacturers that engage in validated safety, health, hazard, and risk programs and that also document at least 99% (by weight) of product ingredients, and that have independent 3 rd party verification of their supply chain with respect to a number of measures.

79 Use of Wood Products and LEED v4

80 Wood Use and LEED v4 Specification of wood contributes to about 10% of points in various standards. Opportunities for achievement of points through specification of wood products include: o Building life cycle impact reduction (3 pts) o EPDs (1-2 pts) o Sourcing of raw materials (1-2 pts) - annual CSR report - FSC certified wood - recycled content, reused o Material Ingredients unfinished, untreated (1 pt)

81 Wood Use and LEED v4 Opportunities for achievement of points through specification of wood products include: o Low-emitting materials no or low formaldehyde (1-2 pts) o Reclaimed materials ( 1 / 2 pt) multifamily midrise only (products made from felled, diseased, or dead trees from urban or suburban areas) In principal wood producing areas, high potential for achieving locally sourced multiplier.

82 Summary A number of changes have been made to LEED in the latest version of the standard. The most substantial changes have occurred in the Materials and Resources section. Environmental impacts of materials and products cannot be accurately determined through intuition. Life cycle analysis (LCA) performed in accordance with international protocols facilitates accurate determination of environmental impacts and product comparisons.

83 Summary LCA-based EPDs provide reliable information regarding product attributes. Product comparisons difficult. HPDs provide complete information regarding chemical ingredients. Too much information?? Wood use can contribute to about 10% of total LEED v4 credits.

84 This concludes The American Institute of Architects Continuing Education Systems Course Questions? Jim Bowyer Dovetail Partners, Inc.