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GreenPoint Rated and Green MaterialsKaty Hollbacher, P.E. | beyondefficiency.org
May 16, 2009
Today’s Presentation:
2
Considering individual choices in context of the project as a whole
Verification & testing: choosing a green material is not enough!
Example material-related measures in GreenPoint Rated
Who Is Build It Green?
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Drive policy development— partner with government to establish credible and accessible green building policies that promote private sector innovation and provide consistent guidelines statewide.
Increase supply of green homes—train building professionals on latest best practices and connect green product suppliers with consumers.
Stimulate consumer demand—build awareness of the benefits of green building by providing GreenPoint Rated as a trustworthy, recognized brand for green homes.
Mission is to promote healthy, energy- and resource-efficient buildings in California.
What Is Green Building?
4
“Whole-Systems” approach for designing and constructing buildings that: are integrated into the building site
consume less energy and water are durable and easier to maintain use resource efficient techniques and materials
are healthier, safer, and more comfortable
Green=SMART
Traditional vs. Green Approach
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Traditional: how much more does it cost to install a 92% instead of 80% AFUE furnace?
Greener: how much more does it cost to operate and maintain an 80% instead of 92% AFUE furnace over 20 years?
Think lifecycle cost, not upfront cost Think value, not cost
The Whole-Systems Approach
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What is a ‘truly green’ heating system? Insulation is installed properly, and levels exceed code
Air sealing techniques minimize heat loss at doors, elec. outlets, attic hatches, etc…
Windows are dual-pane and low-E Ductwork and furnace have been sized and designed with appropriate manuals
System has been tested for proper performance
Furnace is properly maintained over its lifetime…
Step 1: Conserve Resources
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Use materials resourcefully Efficient design Smart construction Waste management/recycling
Always ask: What is the highest and best use of a product? Good: Downcycle Better: Recycle (salvage and reuse)
Best: Refinish or refurbish
Step 2: Choose Materials
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Recycled content Salvaged or reused Rapidly renewable Sustainably harvested Resourceful Safe and healthy Lifecycle considerations: Locally sourced or manufactured
Durable/low-maintenance Recyclable or biodegradable
Associated energy & water use
Beyond Product and Material Selection…
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Defining a product as “green” is not straightforward
A product is often just one component of a larger system
Rarely is there a ‘greenest’ choice; depends on specific situation
“Green Products” can be used in dumb ways!What Makes a Product Green? http://tinyurl.com/ber2ko
Think Big Picture. Think Critically. Use Common Sense!
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Making Green Building Happen: Communication and Coordination
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Subs/Specialty Trades
General Contractor
Owner
Architect/ Designer
Green Building Bu
ilding
Department
Product Supplier
How to collaborate?
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Identify project goals. Assemble quality team—and educate them. Identify and assign “gray area” roles. WHO is accountable for WHAT?
Who needs to be consulted when? How will accountability by measured or verified?
Educate and Make the Team Accountable
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“All trades are to become familiar with the GreenPoint Rated checklist and provide all documentation to the owner or Architect to complete the checklist.”
Specify
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Verify
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Why Green Rating Systems?
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Verify and quantify environmental benefits
Achieve energy, water, resource, and carbon-reduction goals
Empower consumers Provide competitive advantage for builders
Create green building market value for products, homes & services
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A program of Build It Green California based & stakeholder grown
Accessible yet credible
Single Family
Multifamily
GreenPoint Rated Certificate
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Minimum Requirements
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Minimum Points – 50 Categories – 5
Minimum thresholds in 4 SF Minimum thresholds in 5 MF
Prerequisites – up to 4 Perform 15% above T-24 50% Waste Diversion by Weight (Recycling or Reuse)
GreenPoint Rated Checklist in Blueprints 3-Yr. Warranty for Shingle Roofs on Multifamily Projects
CategoryMin
PointsMax Points
Community 0 31
Energy 30 194
IAQ/Health 5 51
Resources 6 103
Water 9 69
Totals 50 448
Why LEED Homes & GreenPoint Rated?
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Provide complementary opportunities to California builders: GreenPoint Rated--credible yet accessible point of entry
LEED for Homes--national environmental leadership award for top-performing new homes
California Code GreenPoin
t Rated LEED Homes
Collaboration: Memorandum of Understanding
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Cross-training of GreenPoint Raters and LEED for Homes Raters and Representatives
Dual branding with equivalency tool Cross-referrals to steer projects towards the most appropriate rating system
The GreenPoint Rated Process
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Build It Green Manages program Trains and certifies the raters Provides quality assurance of raters Issues certificates to builders
GreenPoint Rater Coordinates with Build It Green Provides rating and verification
Who are GreenPoint Raters?
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Certified by Build It Green; no contractual relationship
Prior building industry & green building experience required
Raters receive 3.5 day training
Written & field exams Ongoing certification requirements
GreenPoint Checklists
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Accompany guidelines and provide a tool to track green features of a project
Define specific metrics for achieving green building measures
Uses: Do-it-yourself assessment Communication tool for project team Policy tool for municipality and builder Basis for third-party verified projects
Verification Methods
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Four ways to verify each measure:
Rater Manual defines the recommended methods
Balance between rigor and excessive burden
Plan Review
Rough Inspection
Final Inspection
Documentation
Material-related GPR measures
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How do specific materials help earn points in GreenPoint Rated? Are environmentally preferable Improve durability or reduce maintenance requirements (eg overhangs)
Contribute to energy or water efficiency Improve air quality (eg hard surfaces in entryways)
Are part of a resource-efficient system… or not used at all!
Site
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Deconstruct Instead of Demolishing Existing Buildings on Site
SF MFSF MF
A2
Foundation
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Displace Portland Cement in Concrete with Recycled Flyash or Slag a. 20% b. 25% (MF 30%)
SF MFSF MF
C2B1
Foundation
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Use Frost-Protected Shallow Foundation in Cold Areas (C.E.C. Climate Zone 16)
SF MFSF
B2
Structure
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Optimal Value Engineering (Advanced Framing) a. Place Rafters & Studs at 24-Inch On Center
SF MFSF
C5D1
Structure
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Optimal Value Engineering (Advanced Framing) b. Size Door AND Window Headers for Load
SF MFSF
C5D1
Yes
No
Structure
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Engineered Structural Elements b. Insulated Engineered Headers
SF MFSF
D2
Quiz: Structure
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b. Size Door and Window Headers for Load?
SF MFSF
C5D1
NO
SF MFSF
C5D1
NOYes!
Structure
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Optimal Value Engineering (Advanced Framing) c. Use Only Jack and Cripple Studs Required for Load
NO
SF MFSF MF
C4D2
Engineered Structural Elements c. Wood I-Joists or Web Trusses for Floors
Structure
35
Structure
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FSC Certified Wood
SF MFSF MF
PD3,4
D3 C3
Structure
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Design Energy Heels on Roof Trusses (75% of attic insulation height at outer edge of ext. wall)
MFMF
C8D6
SF
Structure
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Install Overhangs and Gutters (16” & 24”)
SFSF MF
D10
Manual: Measured horiz. from finish siding to end of fascia, not gutter
Must be on all sides of roof, not just eaves
Exterior Finish
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Install a Rain Screen Wall System
SF MFSF MF
C11E2
Manual: A 3/8” min air space (spacer strips or rain screen mat) that allows for effective ventilation
Exterior Finish
40
Select Durable and Fire-Resistant Roofing Materials
SF MFSF MF
C10E4
Manual: • Class A assembly (SF/MF)• 3 yr subcontractor installation guarantee & 20 yr mfr warranty (req’d in MF)
Finishes
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Vandalism Deterrence E.13 Project Includes Vandalism Resistant Finishes and Strategies
F.5 Vandalism Management Plan
SF MFSF MFE13, F5
Insulation
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Install Insulation with 75% Recycled Content Note: post-industrial OK
SF MFSF MF
C9F1
Field: ONLY cellulose, cotton, rockwool meet this
Insulation
43
SF MFSF M
F3
Pre-Drywall Inspection Shows Quality Insulation Installation Note: HERS verification req’d
Holes everywhere…
44energystar.gov
Caulking and Sealing
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Air sealing Increase comfort and reduce energy bills
25% or more of heat loss from homes is due to air infiltration
Rated vs. Actual R-Value Air infiltration can reduce a wall's rated insulative value from R-13 to an effective value of R-5
Tax credits up to $1500
Building Performance
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Home obtains EPA Indoor Air PLUS Certification Home must be ENERGY STAR rated
Same HERS Rater does the IAP
Pilot phase is just ending
SF MFSF
J3
SF MFSF
J3
++ Materials
Moisture Control ++
Pest Barriers++
Combustion Systems++HVAC Systems++
Radon Control++
Building Performance
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Home obtains EPA Indoor Air PLUS Certification No extra IAP fees over regular fees at this time
EPA Indoor Air PLUS
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“Specifications were developed based on best available science and information about risks associated with indoor air quality problems, and balanced with practical issues of cost, builder production process compatibility, and enforceability” epa.gov/iaq/indoorairplus
Finish Measures
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Paints, sealants, adhesives
Cabinetry & furnishings Flooring Appliances
Invoices, MSDS, cut sheets as documentation
Watch for switch-outs during construction (but it’s in the specs!)
Finishes
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Design Entryways to Reduce Contaminants SF/MF - Provide Hard Surface & Permanently Installed Shoe Storage System at Home Entrances
MF - Permanent Walk-Off Systems are Provided at All Main Entrances & in Common Areas
SF MFSF MF
E2K1
Manual: Built-in cubby or shelf is req’d, bench isn’t
Finishes
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Use Low/No-VOC Paint
Field: Documentation is key. Finding cans in field is often difficult and not necessarily indicative of which paint was applied where.
Finishes
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Use Environmentally Preferable Materials for Interior Finish A) FSC Certified Wood, B) Reclaimed, C) Rapidly Renewable D) Recycled-Content or E) Finger-Jointed or Local
SF MFSF MF
E7K6
PK1
Appliances
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Install a Built-in a. Recycling Center b. Compost Center
MFMF
E3M4
SF
Community Design
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Cluster Homes / Keep Size in Check c. Home Size Efficiency
SFSF MF
O2 O2
The Not So Big House
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Since 1949, the square footage of housing per person has jumped by 3.6 times from 214 to 769 in the U.S.! Sarah Susanka,
notsobighouse.com Typically calls for building one-third less in square footage than homeowners think they need
“McMansion”
Market Trends: Small Is In?
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Living small: Defying trend, some homeowners make more of less square footage MarketWatch.com: tinyurl.com/livingsmall
2009 Forecast: Smaller Single-family Home Trend Will Continue Trulia.com: tinyurl.com/smallertrend
Homework?
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Ask an architect or builder friend if you can review a few old sets of plans
Practical exercise: Review plans with a critical eye regarding material use
How is this project doing a good job?
What can be improved? Where do you require more info to make an honest assessment?
Questions…
58beyondefficiency.org